[10:10:16] DIVE10 test message from Okeanos Explorer [11:35:48] EX2104_DIVE10 ROV powered off [12:24:04] EX2104_DIVE10 ROV Launch [12:30:31] EX2104_DIVE10 ROV on Surface [12:32:14] EX2104_DIVE10 ROV Descending [12:32:48] LAT : 35.262284 , LON : -47.999323 , DEPTH : 13.7534 m, TEMP : 25.76676 C, SAL : 36.62906 PSU, DO : 6.99064 mg/l [12:37:49] LAT : 35.263993 , LON : -48.000657 , DEPTH : 53.0365 m, TEMP : 19.84765 C, SAL : 36.46315 PSU, DO : 7.92482 mg/l [12:42:49] LAT : 35.265818 , LON : -48.003173 , DEPTH : 55.156 m, TEMP : 19.59375 C, SAL : 36.43098 PSU, DO : 7.93607 mg/l [12:47:49] LAT : 35.265858 , LON : -48.003448 , DEPTH : 124.3184 m, TEMP : 17.7059 C, SAL : 36.39999 PSU, DO : 7.02195 mg/l [12:52:50] LAT : 35.266061 , LON : -48.00355 , DEPTH : 271.9239 m, TEMP : 15.66551 C, SAL : 36.03149 PSU, DO : 6.45582 mg/l [12:53:03] stevenauscavitch leaves the room [12:57:51] LAT : 35.266349 , LON : -48.003425 , DEPTH : 418.6898 m, TEMP : 11.51247 C, SAL : 35.42198 PSU, DO : 5.2276 mg/l [13:02:51] LAT : 35.266565 , LON : -48.003412 , DEPTH : 570.8603 m, TEMP : 8.18132 C, SAL : 35.12172 PSU, DO : 5.49142 mg/l [13:07:52] LAT : 35.266641 , LON : -48.003187 , DEPTH : 724.8508 m, TEMP : 6.6383 C, SAL : 35.12353 PSU, DO : 6.58394 mg/l [13:12:53] LAT : 35.266681 , LON : -48.00323 , DEPTH : 874.3075 m, TEMP : 5.91803 C, SAL : 35.13179 PSU, DO : 7.27605 mg/l [13:17:53] LAT : 35.266588 , LON : -48.003164 , DEPTH : 1027.1674 m, TEMP : 5.28019 C, SAL : 35.10246 PSU, DO : 7.77888 mg/l [13:22:40] juliajohnstone leaves the room [13:22:53] LAT : 35.266534 , LON : -48.003043 , DEPTH : 1166.6601 m, TEMP : 4.60303 C, SAL : 35.01573 PSU, DO : 8.2168 mg/l [13:23:14] jocelyncooper leaves the room [13:25:55] noellehelder leaves the room [13:27:54] LAT : 35.266381 , LON : -48.002899 , DEPTH : 1316.8544 m, TEMP : 4.71284 C, SAL : 35.07795 PSU, DO : 7.93289 mg/l [13:32:55] LAT : 35.266207 , LON : -48.002771 , DEPTH : 1477.8846 m, TEMP : 4.33146 C, SAL : 35.04071 PSU, DO : 8.16595 mg/l [13:37:56] LAT : 35.26604 , LON : -48.00277 , DEPTH : 1635.0044 m, TEMP : 4.40822 C, SAL : 35.05922 PSU, DO : 8.00851 mg/l [13:38:43] Thanks for diving a bit deeper today. Hopefully we'll get some rocks that will provide an age for the seamount [13:40:46] noellehelder leaves the room [13:42:56] LAT : 35.266012 , LON : -48.002558 , DEPTH : 1790.274 m, TEMP : 4.38999 C, SAL : 35.05766 PSU, DO : 7.94556 mg/l [13:47:28] For those hearing we're just working on some recuts of audio for daily videos [13:47:56] LAT : 35.266095 , LON : -48.002447 , DEPTH : 1902.3756 m, TEMP : 3.91671 C, SAL : 34.99109 PSU, DO : 8.2292 mg/l [13:51:18] Solmissus! [13:51:22] on camera 2 [13:52:01] Prayidae [13:52:57] LAT : 35.265612 , LON : -48.002373 , DEPTH : 1913.708 m, TEMP : 3.90434 C, SAL : 34.99509 PSU, DO : 8.2205 mg/l [13:54:05] Solmissus [13:54:21] vondawarehamhayes leaves the room [13:54:26] rhianwaller leaves the room [13:56:15] rhianwaller leaves the room: Replaced by new connection [13:57:57] LAT : 35.265468 , LON : -48.002382 , DEPTH : 1955.2028 m, TEMP : 3.83353 C, SAL : 34.98496 PSU, DO : 8.20987 mg/l [13:58:57] 20m off bottom [13:59:30] bottom in sight [13:59:38] EX2104_DIVE10 ROV on Bottom [14:01:53] noellehelder leaves the room [14:02:57] LAT : 35.265437 , LON : -48.002525 , DEPTH : 1985.0355 m, TEMP : 3.80929 C, SAL : 34.98062 PSU, DO : 8.26841 mg/l [14:03:38] Did we land on the ridge crest or slope? Looks like a flat smooth FeMn crust [14:04:17] Below the ridge, we transit up a wall and then onto the ridge [14:07:53] lots of seastars [14:07:59] LAT : 35.265339 , LON : -48.002565 , DEPTH : 1983.7045 m, TEMP : 3.82202 C, SAL : 34.98342 PSU, DO : 8.2677 mg/l [14:08:03] Might be fossil coral debris field that is encrusted. I agree with Kira, it's a great looking rock but hard to tell if it's in-situ [14:08:46] feather star [14:09:48] feather stars in chrus line [14:09:52] thoughts on this outcrop overhand, Kevin? [14:09:54] chorus [14:12:36] I was going to say paramuricea for this but the polyps contracted are different. so maybe some other plexaurid [14:12:50] Thanks Les! [14:12:56] benthocodon? [14:13:00] in cam2 [14:13:01] LAT : 35.265382 , LON : -48.002612 , DEPTH : 1980.1319 m, TEMP : 3.78494 C, SAL : 34.97957 PSU, DO : 8.27907 mg/l [14:16:09] Collapsed pillow [14:16:42] rocks in here of interest, Kevin? [14:17:03] A lot of volatiles built up in that pillow before it popped. [14:17:24] If we see a thick rock among the pillows. The rind won't be date-able [14:17:33] emilycrum leaves the room [14:17:35] ok for Stauropathes) [14:17:38] hi here [14:17:49] kensulak leaves the room [14:17:49] Thanks Tina - hi! [14:18:00] LAT : 35.265318 , LON : -48.00253 , DEPTH : 1978.2022 m, TEMP : 3.78077 C, SAL : 34.97745 PSU, DO : 8.28675 mg/l [14:18:11] leswatling leaves the room [14:18:20] I am here but a bit distracted) [14:18:46] noellehelder leaves the room [14:19:23] they look more like Vaganella... [14:19:32] spelling is wrong [14:20:12] Vaughanella [14:20:26] johndeitz leaves the room [14:20:34] yes))) [14:22:04] haroldcarlson leaves the room [14:23:00] LAT : 35.265286 , LON : -48.002448 , DEPTH : 1977.6895 m, TEMP : 3.78305 C, SAL : 34.97772 PSU, DO : 8.27003 mg/l [14:23:47] Really sediment free, should be a prime crust formation area. Too bad we can't drill anything [14:23:57] mysid [14:24:34] You'll have to propose to come back with a drill Kevin - the last few dives have really been fascinating! [14:25:33] I was thinking of submitting a IODP proposal. Get a record of ancient mid-Atlantic reefs and then some nice basalts [14:25:49] could also be eroded that current is so high [14:26:33] That would be awesome Kevin [14:27:06] kensulak leaves the room: Replaced by new connection [14:28:01] LAT : 35.265223 , LON : -48.002616 , DEPTH : 1977.9431 m, TEMP : 3.77944 C, SAL : 34.97647 PSU, DO : 8.30238 mg/l [14:28:37] Stauropathes cf punctata [14:28:46] noellehelder leaves the room [14:29:04] an impressively "thick" colony [14:29:37] yep [14:29:55] vondawarehamhayes leaves the room [14:30:16] I am looking each time you are speaking "black coral" aloud)) [14:30:24] gammarid amphipod [14:32:41] LIttle fossil city in this pillow [14:33:01] LAT : 35.265203 , LON : -48.00257 , DEPTH : 1974.4589 m, TEMP : 3.7984 C, SAL : 34.98013 PSU, DO : 8.24523 mg/l [14:33:28] Clio pteropod shell [14:33:59] mysid [14:34:41] crinoid? [14:36:06] vondawarehamhayes leaves the room [14:36:33] kensulak leaves the room [14:37:24] michaelvecchione leaves the room [14:38:02] LAT : 35.265025 , LON : -48.002395 , DEPTH : 1968.133 m, TEMP : 3.81724 C, SAL : 34.98178 PSU, DO : 8.28046 mg/l [14:38:05] kimberlygalvez leaves the room [14:40:15] macrourid [14:42:04] leswatling leaves the room [14:42:16] I am amazed at the fact that this is a hard, sediment clear substrate at the right depth but hardly any corals and sponges. Hmmmm [14:43:02] LAT : 35.264963 , LON : -48.002423 , DEPTH : 1965.163 m, TEMP : 3.82975 C, SAL : 34.98765 PSU, DO : 8.2729 mg/l [14:43:04] Sponge may be a rossellid [14:43:14] Interesting that some boulders have high bio density while nearby rocks are barron. I wonder if it's microtextures in the crust or something [14:44:06] limited food availablility perhaps [14:44:21] Yeah, Kevin and jason. Dont quite understand what is going on here. [14:44:44] or there is just enough sediment to prevent laval settling [14:45:14] Just doesn't seem like there is that much sediment [14:45:17] not likely to be trawled at this depth [14:45:56] Yellow sponge could have been Hertwigia [14:46:22] or, it's better to hang out on a big rock off the open platform :-) [14:46:26] Bathypathes [14:46:26] johndeitz leaves the room [14:47:35] Yeah, I guess it is Hertwigia. Thanks for the closeup [14:48:02] LAT : 35.264914 , LON : -48.002618 , DEPTH : 1960.1909 m, TEMP : 3.83019 C, SAL : 34.98395 PSU, DO : 8.25181 mg/l [14:48:15] noellehelder leaves the room [14:48:21] flytrap anenome [14:48:42] what is the sedimentation rate out here? [14:50:16] Not sure @harold! [14:50:25] @harold, somewhere in the range of 100 to 200 m/million years [14:50:55] noellehelder leaves the room [14:51:09] @jason would that be considered high or low rate? [14:51:18] but that is based on limited information, especially for the deeper sections [14:51:46] low [14:52:04] or lowish [14:52:34] thanks. [14:53:03] LAT : 35.264881 , LON : -48.002355 , DEPTH : 1956.0711 m, TEMP : 3.75702 C, SAL : 34.97659 PSU, DO : 8.24867 mg/l [14:53:19] but not as low as would be expected from this far out on the Sohm abyssal plain [14:54:24] Given the age of cretaceous guyots out here, some summits must have some seriously thick sediment beds [14:56:23] vondawarehamhayes leaves the room [14:57:07] Large flows + shallower depth most likely. The greater the hydrostatic pressure the harder it is to form bubbles. So these erupted at depths shallower than it currently resides (<2000mbsl) [14:58:03] LAT : 35.264806 , LON : -48.002426 , DEPTH : 1949.2823 m, TEMP : 3.76581 C, SAL : 34.97697 PSU, DO : 8.30008 mg/l [15:00:17] haroldcarlson leaves the room [15:03:04] LAT : 35.264729 , LON : -48.002471 , DEPTH : 1948.529 m, TEMP : 3.77265 C, SAL : 34.97864 PSU, DO : 8.24804 mg/l [15:03:36] dhugallindsay leaves the room [15:06:41] very unusual growth orientation. Usually the colony is perpendicular to the prevailing current with the polyps oriented down-current. That colony however had polyps oriented in multiple directions [15:07:05] noellehelder leaves the room [15:08:05] LAT : 35.264648 , LON : -48.002507 , DEPTH : 1945.4339 m, TEMP : 3.77376 C, SAL : 34.97895 PSU, DO : 8.25571 mg/l [15:08:21] @steve - it was multiple broken pieces - so they had fallen in different orientations [15:09:56] I would agree Rhian. Plexaurid or paramuriceid [15:10:40] rossellid vase [15:13:06] LAT : 35.264677 , LON : -48.002257 , DEPTH : 1941.6133 m, TEMP : 3.78572 C, SAL : 34.98081 PSU, DO : 8.2517 mg/l [15:15:42] kensulak leaves the room [15:16:40] Hertwigia and demosponges [15:16:46] noellehelder leaves the room [15:18:07] LAT : 35.264499 , LON : -48.002334 , DEPTH : 1933.7866 m, TEMP : 3.75151 C, SAL : 34.97402 PSU, DO : 8.26735 mg/l [15:18:25] noellehelder leaves the room [15:19:59] chrysogorgiid [15:20:03] All the loose bits were likely buried by the old fossils and cemented over. Fingers crossed something comes along [15:20:10] or acanella I guess [15:22:24] vondawarehamhayes leaves the room [15:23:01] upasanaganguly leaves the room [15:23:02] johndeitz leaves the room [15:23:07] LAT : 35.264553 , LON : -48.002488 , DEPTH : 1935.5194 m, TEMP : 3.77343 C, SAL : 34.9792 PSU, DO : 8.24361 mg/l [15:23:24] christophermah leaves the room [15:25:13] gordonrees leaves the room [15:25:54] Such hard-surfaced manganese encrusted volcanic substrate is OK for sessile invertebrates, but very poor habitat for fishes and benthopelagic megafauna. Aside from certain specialized taxa, deep benthic fishes are generally either benthivores (feeding on invertebrates on or within the sediment) or predators (feeding on the benthivorous fishes, as well as megafaunal crustacean and cephalopods). Thus, there is fundamentally a deficiency of the food base that supports most of the typical macrourids, halosaurs, etc. on such habitat [15:28:07] LAT : 35.264525 , LON : -48.002463 , DEPTH : 1930.838 m, TEMP : 3.78283 C, SAL : 34.98014 PSU, DO : 8.23553 mg/l [15:29:38] Sometimes you can break off the edge of a sharp ridgelike rock as is showing, if the edge is thin enough. It might be worth a try [15:30:30] Sorry, popping in and out today, so apologies if someone has commented on this already: there is a LOT of coral debris here! One wonders how deep it goes on some of these flat spots... [15:31:27] I would suspect that we might encounter a tripodfish on such habitat - since tripodfishes feed to some extent on current-borne plankton, e.g., microcrustacea. The large tripodfish Bathypterois grallator with prop fins up to a meter long is a typical inhabitant of this depth regime. From its elevated perch, it faces into the current awaiting planktonic and small nektonic preye [15:31:29] @Chris we haven't really seen many potential edges to do that - it has to be pretty thin (and non carbonate) for the ROV to break it (they don't like to do big pieces as it damages the wrist) [15:31:32] The fact that the corals and sponges all seem to be on the harder boulders sticking up provides support for your suggestion that the substrate may simply not be stable enough for settlement [15:31:51] @Ken, I would love to see a tripod fish! [15:33:08] LAT : 35.264393 , LON : -48.002145 , DEPTH : 1929.7169 m, TEMP : 3.77727 C, SAL : 34.97962 PSU, DO : 8.24937 mg/l [15:33:23] vondawarehamhayes leaves the room [15:34:11] noellehelder leaves the room [15:38:08] LAT : 35.264354 , LON : -48.002402 , DEPTH : 1923.1725 m, TEMP : 3.78055 C, SAL : 34.97999 PSU, DO : 8.26887 mg/l [15:39:00] leswatling leaves the room [15:40:38] kensulak leaves the room [15:42:26] christophermah leaves the room [15:42:43] noellehelder leaves the room [15:43:08] LAT : 35.264309 , LON : -48.002241 , DEPTH : 1921.1569 m, TEMP : 3.81452 C, SAL : 34.98378 PSU, DO : 8.22851 mg/l [15:43:10] vondawarehamhayes leaves the room [15:48:08] LAT : 35.264112 , LON : -48.00219 , DEPTH : 1916.2208 m, TEMP : 3.79918 C, SAL : 34.98286 PSU, DO : 8.1754 mg/l [15:48:10] echinothuriid urchin, possibly Sperosoma [15:48:58] fish [15:49:09] macrourid [15:49:33] This macrourid could be Coryphaenoides [15:49:52] urchin is interesting... is it pooping? [15:50:04] dark red = aboral gills? [15:50:08] Fish! Coryphaenoides carapinus - rattail macrourid. [15:50:12] @ChrisK, I think this stuff is too mobile for for sessile things with longevity [15:50:28] I agree Les [15:51:35] I've never seen those red projections on the urchin.. not the balloon spines are they? [15:51:45] this macrourid is a typical inhabitant of depths around 2000 m The large blackish eye is a typical ID feature [15:52:34] Gotta go for awhile. Will be back [15:52:38] christopherkelley leaves the room [15:52:44] Coryphaenoides carapinus likes to feed on brittle stars - so it is in a happy zone [15:53:09] LAT : 35.264184 , LON : -48.002516 , DEPTH : 1911.5411 m, TEMP : 3.78044 C, SAL : 34.98145 PSU, DO : 8.18718 mg/l [15:55:06] not a trawl or sled track? [15:55:37] that's why we are going back over them [15:56:28] bit deep here for trawl but possible [15:56:32] not 100% sure what they are [15:56:56] We saw trawl marks at 1200m, so it is a bit deep - but on the blueview there are a lot of these marks... [15:57:15] scientific trawl or sledge...then depth isn't such an issue [15:57:17] Regarding the double linear track along the bottom, this is likely anthropogenic - from back in the early days of deep-sea exploration, pre-sub, pre-ROV. Most exploration was accomplished using bottom trawls (Challenger, Albatross, Columbus Iselin, etc.) One of the typical trawls employed was a semi-balloon otter trawl, spread hydrodynamically using two wooden or steel 'doors' that spread the mesh as the scraped along the bottom, leaving a nice double linear track. Looks like that is what you encountered today [15:57:21] exploratory trawling for rattails [15:57:51] no recorded geologic sampling in this location [15:58:10] LAT : 35.264055 , LON : -48.002438 , DEPTH : 1907.3863 m, TEMP : 3.79395 C, SAL : 34.98289 PSU, DO : 8.203 mg/l [15:58:21] there was a lot of mapping by McGregor et al. but maybe they didn't use dredge or anything [15:58:27] Richard Haedrich from Woods Hole and later Newfoundland conducted years of bottom trawling in the New England area. [15:58:54] vondawarehamhayes leaves the room [15:59:02] But not here until the Russians started fishing in the 1970s [16:00:10] we saw a door mark on Bear seamount, where we know NMFS had trawled and it looked a lot different than the mark here.... a very sharp and deep v, almost a meter deep [16:00:39] emilycrum leaves the room [16:02:47] there are obvious trawl marks at Corner and Caloosahatchee seamounts in this group, and we thought we saw evidence of trawling a bit shallower on this seamount [16:03:09] Les - In 1979 I was aboard the German research vessel Anton Dohrn for a few months, Newfoundland to Virginia, bottom trawling between 1000-2000 m with large bottom trawls. We did trawl extensively all along the US East Coast at 500-2000 m, including this area [16:03:12] LAT : 35.26404 , LON : -48.002378 , DEPTH : 1903.4907 m, TEMP : 3.82213 C, SAL : 34.98494 PSU, DO : 8.1911 mg/l [16:04:21] kimberlygalvez leaves the room [16:04:33] thanks @Ken, all the way out here? This is the furthest east of the Corner seamounts.... maybe these are from your work.... [16:04:49] Hi folks - Kasey here on Rhian's account [16:06:02] more scars? [16:07:31] christophermah leaves the room [16:08:12] LAT : 35.263957 , LON : -48.002309 , DEPTH : 1900.1224 m, TEMP : 3.80268 C, SAL : 34.98289 PSU, DO : 8.22345 mg/l [16:08:15] vondawarehamhayes leaves the room [16:09:23] in feed 2 the scars are quite obvious [16:10:18] how are folks feeling about the scanning we are doing here - keep doing this or take some more zooms as we're moving? [16:13:13] LAT : 35.263853 , LON : -48.002167 , DEPTH : 1897.0027 m, TEMP : 3.83542 C, SAL : 34.98858 PSU, DO : 8.18653 mg/l [16:13:23] these two scars together do not look like trawl door scars, but I can't say what they are [16:13:33] I am curious if it would be interesting to poke some of the rubble to see how easily it could be moved [16:13:54] bryozoan? [16:13:59] tinamolodtsova leaves the room [16:14:15] yes the yellow [16:14:34] Les - Haedrich focused on the NE canyons, Hudson, Oceanographer, etc. The Anton Dohrn cruise sampled both along the continental margin and considerably further out - seeking to sample at deep depths. Other vessels have sampled the rise, abyss, and edges of seamounts. I led one deep trawling cruise from Miami to Bermuda to Rhode Island back in 1981 on RV Columbus Iselin. I participated on another on RV Oceanus from Woods Hole trawling again down to 2000-5000 m in 1983. The USS Albatross also conducted considerable deep trawling, but with beam trawls, in the New England area and southward. [16:14:45] I think white - dead bryozoan... [16:15:55] haha, I need to comprehend in between reading before I speak [16:16:42] This is impressive rubble cover. Have you tested how cohesive it is? Is it easily moved? Can test by poking it or setting down and observing how it moved as the vehicle sits down [16:16:44] Hexadella (bright yellow) can encrust many different types of sponges.... just wondering can this be the case with the Bryozoan?... [16:17:04] @Ken, yeah, but I don't think any of that was on these seamounts. In fact, I am not sure who knew what was actually here in 1983. McGregor had just completed the single-beam bathy mapping by that time, I think. [16:17:13] anemone, I would guess [16:17:43] Henricia? [16:18:05] Ballard and company did some further geological mapping and some Alvin dives in 1974 maybe... so the timeline might be right... have to check. [16:18:13] LAT : 35.263867 , LON : -48.00231 , DEPTH : 1892.7904 m, TEMP : 3.86597 C, SAL : 34.99102 PSU, DO : 8.1622 mg/l [16:18:43] does not look like [16:18:54] ballard et al worked on Corner Rise seamount, I don't think they got this far over [16:19:18] Diacria trispinosa pteropod shell beside the star [16:20:17] I second collection [16:20:58] They're going to collect and then push around the rubble to see how mobile it is [16:21:20] Les - you are correct. We were working semi-blind back in those days (1960s-1990s). Very limited good bottom mapping. We would run a track using the depth sounder, and if the bottom looked trawlable, we reversed course and dropped the trawl. We lost trawls on seamount of which we were not aware. Also at times, filled up the trawl with black coral rubble like we are seeing today. Another factor in placing the trawl on the bottom is that at 2000 m depth with maybe 6000-8000 m of wire out, the trawl was tracking a mile behind the ship. So the bottom we were observing on the depth finder was not the actual bottom being trawled. [16:23:13] LAT : 35.263875 , LON : -48.002254 , DEPTH : 1894.1638 m, TEMP : 3.88285 C, SAL : 34.9924 PSU, DO : 8.15507 mg/l [16:24:05] Diacria trispinosa is really beautiful when alive, and quite unpleasant for sorting sediment [16:24:43] noellehelder leaves the room [16:25:37] christophermah leaves the room [16:26:20] rhianwaller leaves the room: Replaced by new connection [16:28:09] upasanaganguly leaves the room [16:28:15] LAT : 35.263925 , LON : -48.002282 , DEPTH : 1892.1835 m, TEMP : 3.9267 C, SAL : 34.98974 PSU, DO : 8.15182 mg/l [16:28:33] kensulak leaves the room [16:28:42] @Ken, I was a decade off... the McGregor paper was 1973 where the Corner seamounts were first mapped. And the Ballard dives were in 1974 as I noted. Also, the Uchupi et al paper was 1970 where the rough positions of the NES were located and their approximate summit heights based on single beam [16:29:03] vondawarehamhayes leaves the room [16:29:05] georgematsumoto leaves the room [16:29:40] So @Ken, what happened to all those samples? The coral rubble might be especially interesting. But maybe it was all shoveled overboard... [16:31:04] coral rubble assemblage does look wonderfully complex [16:32:43] I think it is complex inside [16:32:45] rhianwaller leaves the room [16:33:11] a few scoops would make a good study for diversity [16:33:13] just invisibly complex. rubble is great for polychaetes [16:33:17] LAT : 35.263995 , LON : -48.002291 , DEPTH : 1891.6546 m, TEMP : 3.92054 C, SAL : 34.99675 PSU, DO : 8.14268 mg/l [16:35:07] vondawarehamhayes leaves the room [16:36:09] @Cindy for sure - but we don't have the # people onboard to be able to process a diverse sample like that sadly [16:36:34] georgematsumoto leaves the room [16:37:00] leswatling leaves the room [16:37:25] @rhian...just thinking of down the road....a different kind of cruise [16:37:55] rubble seems to be getting more rugose [16:38:15] LAT : 35.263833 , LON : -48.002429 , DEPTH : 1882.1329 m, TEMP : 3.91211 C, SAL : 34.99609 PSU, DO : 8.12437 mg/l [16:38:39] @steve agree - sounds like a tongue twister too [16:38:42] Chief Scientist for Oceanus cruise 183 was ---- Wilson. He was at Univ. S. Florida at the time, but some samples probably went to Woods Hole and the MCZ. Anton Dohrn cruise was a pure fish expedition. No systematic preservation of inverts or substrate. All samples went back to Germany. The Columbus Iselin cruise was a multi-disciplinary mission. I was head scientist, but had invited a group of specialists. Fishes went to U Miami, but they are now mostly in the Smithsonian and the University of Florida fish collection. Inverts went to U. Miami, curated by Nancy Voss. We did save lots of substrate samples, but I forget who was the geology honcho, and do not know where the samples went. I donated all the original cruise logs to Florida Museum. [16:38:45] juliajohnstone leaves the room [16:39:58] Could indicate getting closer to the "source" where rubble has fallen less far downslope and broken up less. [16:40:26] @ken -- T least some cephalopods from Anton Dohrn went to NMNH. [16:42:27] christophermah leaves the room [16:42:45] Heading to my office. Fingers crossed there is a rock somewhere. [16:42:54] interesting @Ken... maybe those data were what gave the Russians the idea of fishing there, although I checked the Vinnichenko paper and he says they discovered the fishery in 1976. [16:43:02] always looking @Kevin [16:43:16] LAT : 35.263703 , LON : -48.002184 , DEPTH : 1874.0933 m, TEMP : 3.93181 C, SAL : 34.99653 PSU, DO : 8.13385 mg/l [16:43:39] Nice sheet flow [16:43:40] Mike - you are correct. We did have a red crab and squid guy aboard. I forget his name right now - it will come to me a bit later. He was with NMFS out of Gloucester. We caught lots of squids in the company of pelagic schools of butterfish - caught pelagically when retrieving the trawl. That fellow was a really good guy - very competent, but not a systematics type - rather a fishery biologist. Oh - my old synapses just kicked in - Warren Rathjen [16:43:45] Maybe [16:44:31] Yes. Warren [16:45:35] He worked with Clyde on deep cephs aound the time I was just getting into it. [16:46:20] Mike - sorry for delayed reply, I keep getting booted off the chatroom every few minutes - requiring a reconnect each time [16:46:53] @ken -- I had that problem until I switched browsers to Netscape. [16:47:35] kelseyviator leaves the room: Replaced by new connection [16:47:37] correction Firefox [16:48:17] LAT : 35.263684 , LON : -48.002423 , DEPTH : 1867.1085 m, TEMP : 3.92243 C, SAL : 34.99595 PSU, DO : 8.11372 mg/l [16:48:25] @Ken, that problem can also happen if you switch between tabs in the same browser window. [16:48:28] Fishie? in the top left [16:48:39] nope sponge [16:48:47] Clearly I have the eyes of geologist [16:49:05] @Kevin LOL - I think we're all on the same page [16:49:43] noellehelder leaves the room [16:49:55] Mike - on that German cruise the 120 ft headrope trawl had very large mesh openings, starting about 12" x 12". I recall that we brought up the eyeball of a great squid. It was retained in that large mesh. It was about the size of a soccer ball and we preserved in in a 5-gallon bucket. There were pieces of arm and suckers also, but the rest of the body must have gone through the large mesh. That trawl was fished at about 4-5 knots - objective to go fast to collect deep sharks, skates, and other very large mobile fishes. [16:50:31] jocelyncooper leaves the room [16:51:38] Hopefully there is something loose at the base of this flow. Really nice massive flow [16:52:11] yes.. Lophaster.. feeding on feather stars [16:52:21] jaymes - I will try Firefox. The problem occurs both with Chrome and Edge - I was using both simultaneously to avoid that switching between tabs within the same browser [16:53:17] LAT : 35.263753 , LON : -48.002295 , DEPTH : 1865.907 m, TEMP : 3.91655 C, SAL : 34.99952 PSU, DO : 8.10755 mg/l [16:54:15] got to sign off now - Thanks to pilot and camera operator for very nice zoomed in imagery of Coryphaenoides carapinus macrourid. [16:54:19] @Ken, I hope that fixes it! [16:54:27] Thanks @Ken [16:54:57] kensulak leaves the room [16:57:28] Thanks all...I'm off to a deep-sea mining "side event" on sustainable development....will be thinking of the animals that live on Fe-Mn crusts of the Corner Rise Seamounts! [16:57:35] cindyvandover leaves the room [16:58:08] davidvousden leaves the room [16:58:18] LAT : 35.263742 , LON : -48.002248 , DEPTH : 1866.8967 m, TEMP : 3.92465 C, SAL : 34.99796 PSU, DO : 8.08714 mg/l [16:58:57] vondawarehamhayes leaves the room [16:59:20] pierrejosso leaves the room [17:00:07] leswatling leaves the room [17:00:16] stevenauscavitch leaves the room [17:03:19] LAT : 35.263704 , LON : -48.002275 , DEPTH : 1868.5002 m, TEMP : 3.92199 C, SAL : 34.9962 PSU, DO : 8.10889 mg/l [17:03:37] tinamolodtsova leaves the room [17:05:33] christophermah leaves the room [17:06:02] Good work. Fingers crossed. [17:06:41] Ok, now I'll head to work. Hard to leave your seat when there is a dive going [17:07:15] Thanks Kevin! [17:07:27] kevinkonrad leaves the room [17:08:19] LAT : 35.263729 , LON : -48.002386 , DEPTH : 1865.2062 m, TEMP : 3.92831 C, SAL : 35.00022 PSU, DO : 8.12487 mg/l [17:08:34] sea spider :) [17:11:15] animals living in the cracks! [17:11:51] David here from South Africa. Noticeable absence of any man-made materials/wastes so far? As i said before i am getting stop-start reception. Admittiedly much of the dives have been on fairly steep substrate so probalby unlikely that any such litter would stay put and you are a long way from land but you are underneath main shipping lanes. [17:12:06] But you may have seen something i haven't? [17:13:20] LAT : 35.263705 , LON : -48.00242 , DEPTH : 1860.0047 m, TEMP : 3.92892 C, SAL : 34.9986 PSU, DO : 8.10301 mg/l [17:14:09] vondawarehamhayes leaves the room [17:15:47] little Hymenaster! [17:16:09] Another different star to right [17:18:09] star in middle [17:18:20] LAT : 35.263641 , LON : -48.002275 , DEPTH : 1856.0591 m, TEMP : 3.92243 C, SAL : 35.00413 PSU, DO : 8.15826 mg/l [17:20:19] davidvousden leaves the room [17:20:26] This reminds me of the fluted carbonate walls off Penguin Bank, Molokai but those were too young and shallow so not Mn crusted. Rhian worked in Hawaii for a number of years so would know that site [17:20:46] kimberlygalvez leaves the room [17:22:03] Isn't this carbonate? [17:23:21] LAT : 35.263665 , LON : -48.002232 , DEPTH : 1848.0783 m, TEMP : 3.92482 C, SAL : 34.99805 PSU, DO : 8.14143 mg/l [17:23:38] It's pretty deep so I guess it could be either basalt or carbonate [17:24:47] As an FYI, we are going to explore up this wall for about 20 minutes or so, then skip to the top of this feature so we can explore the ridge [17:24:50] Would sheet flows be this steep?, also these holes look like carbonate [17:26:01] The ridge is going to be where all the bio is going to be, if its here in abundance. Current flow should intensify as you get closer to the ridge top [17:27:11] Hertwigia [17:27:55] Well known out here in the Atlantic [17:28:22] LAT : 35.263727 , LON : -48.002322 , DEPTH : 1845.633 m, TEMP : 3.93053 C, SAL : 34.99746 PSU, DO : 8.13415 mg/l [17:28:36] wow a starlette [17:28:52] sorry.. couldn't make out any features [17:29:40] probably Narella which forms small planar colonies like this [17:30:39] Hmmmmmmm [17:31:10] snailfish? jellynose? [17:31:25] macrourid I guess but the dorsal fin was more developed than I would expect [17:31:43] noellehelder leaves the room [17:31:49] could be Ornithoteuthis antillarum -- bird squid ommastrphid [17:32:31] Ommastrephidae [17:32:41] @Mike why would the common name be bird squid? What feature prompted it being named that? [17:33:10] I am not sure except that the genus is Ornithoteuthis [17:33:23] LAT : 35.263592 , LON : -48.002254 , DEPTH : 1841.4212 m, TEMP : 3.92881 C, SAL : 34.99842 PSU, DO : 8.13468 mg/l [17:33:34] stevenauscavitch leaves the room [17:35:04] We're about to move off the wall and up to the ridge [17:35:12] There will be a little blue water en-route [17:35:38] Great, ridge top will be safer for pilots [17:36:15] christophermah leaves the room [17:37:10] vondawarehamhayes leaves the room [17:38:23] LAT : 35.263135 , LON : -48.002463 , DEPTH : 1807.4045 m, TEMP : 3.93086 C, SAL : 34.99751 PSU, DO : 8.14377 mg/l [17:39:42] Should be about 30 minutes to move [17:41:45] christopherkelley leaves the room [17:43:23] LAT : 35.263418 , LON : -48.002425 , DEPTH : 1740.7528 m, TEMP : 4.05203 C, SAL : 35.01343 PSU, DO : 8.09646 mg/l [17:45:36] kelseyviator leaves the room [17:47:13] christophermah leaves the room [17:48:23] LAT : 35.263427 , LON : -48.002361 , DEPTH : 1702.0589 m, TEMP : 4.10301 C, SAL : 35.02182 PSU, DO : 8.07801 mg/l [17:51:12] upasanaganguly leaves the room [17:52:43] noellehelder leaves the room [17:53:24] LAT : 35.263277 , LON : -48.002372 , DEPTH : 1703.2621 m, TEMP : 4.06255 C, SAL : 35.01585 PSU, DO : 8.07809 mg/l [17:55:22] vondawarehamhayes leaves the room [17:56:17] christophermah leaves the room [17:56:44] emilycrum leaves the room [17:58:24] LAT : 35.263216 , LON : -48.002489 , DEPTH : 1701.8377 m, TEMP : 4.05956 C, SAL : 35.01627 PSU, DO : 8.10062 mg/l [18:01:54] kelseyviator leaves the room [18:01:54] About 15 minutes [18:02:29] not much in the water column :-( [18:03:24] LAT : 35.262991 , LON : -48.002367 , DEPTH : 1700.7548 m, TEMP : 4.05214 C, SAL : 35.01612 PSU, DO : 8.09417 mg/l [18:04:24] Starting their descent down to reacquire the bottom [18:08:20] pierrejosso leaves the room [18:08:25] LAT : 35.262943 , LON : -48.002341 , DEPTH : 1734.8437 m, TEMP : 3.95083 C, SAL : 34.99997 PSU, DO : 8.1409 mg/l [18:11:01] vondawarehamhayes leaves the room [18:11:31] red ctenophore cydippid [18:11:46] bottom in sight [18:12:24] As expected, more big bio on top of ridge [18:12:43] Can see it already @Chris! [18:12:48] I think thats what we are seeing [18:13:25] LAT : 35.262752 , LON : -48.00233 , DEPTH : 1734.3713 m, TEMP : 3.95771 C, SAL : 35.00039 PSU, DO : 8.15883 mg/l [18:14:55] christopherkelley leaves the room [18:16:55] davidvousden leaves the room [18:18:26] LAT : 35.262689 , LON : -48.002275 , DEPTH : 1735.2092 m, TEMP : 3.89879 C, SAL : 34.99761 PSU, DO : 8.14005 mg/l [18:19:02] Just moving cautiously towards the feature here, should be down shortly [18:21:52] Not that much more bio. Hmmm [18:23:08] Nice big rossellid vase [18:23:26] LAT : 35.262679 , LON : -48.002253 , DEPTH : 1745.2951 m, TEMP : 3.90056 C, SAL : 34.99766 PSU, DO : 8.16054 mg/l [18:24:44] Substrate looks like the start of the dive, we've come full circle :) [18:25:53] Yes, there is more but not as much as I was hoping. Thought we would find another glorious high density community [18:28:26] LAT : 35.2626 , LON : -48.002096 , DEPTH : 1744.0305 m, TEMP : 3.90373 C, SAL : 34.99768 PSU, DO : 8.13899 mg/l [18:29:06] @Kevin, you think volcanic rock? [18:29:09] Primnoid for sure but not sure which genus [18:29:27] we've seen so much carbonate.... [18:29:29] No idea what-so-ever right now [18:30:46] I couldn't see any close polyps. As a general rule, polyps that close down are Narella, polyps that close up are Calyptrophora, but this is not a hard and fast rule and there are plenty of exceptions. This just provides a clue [18:31:32] Big ol' sponges [18:32:41] Watch change for pilots [18:32:54] Aren't they great Kevin? [18:33:22] Yeah, totally. [18:33:26] LAT : 35.262624 , LON : -48.002027 , DEPTH : 1740.5056 m, TEMP : 3.91449 C, SAL : 34.99769 PSU, DO : 8.13562 mg/l [18:33:31] Good point Rhian [18:33:34] Does anything live in the large sponge voids? [18:33:45] is that a seastar over to the left? [18:33:59] yes, plenty of stuff like crabs, shrimp, worms, crinoids, you name it [18:34:28] Don't see it @ChrisM [18:35:19] christopherkelley leaves the room [18:35:46] meaganputts leaves the room [18:36:52] spotted a cusk eel [18:37:07] vondawarehamhayes leaves the room [18:37:49] Primnoidae [18:38:27] LAT : 35.262586 , LON : -48.001904 , DEPTH : 1736.9166 m, TEMP : 3.91943 C, SAL : 34.99924 PSU, DO : 8.14692 mg/l [18:40:07] can age Hemicorallium by base radius [18:41:38] meaganputts leaves the room [18:42:04] haroldcarlson leaves the room [18:42:56] hannahmiller leaves the room [18:43:27] LAT : 35.262561 , LON : -48.001803 , DEPTH : 1736.1862 m, TEMP : 3.89024 C, SAL : 34.99665 PSU, DO : 8.14431 mg/l [18:43:51] Did we take a second rock? Might be a piece of loose crust by the crack to right of the crinoid. Couldn't see it well [18:43:55] around Hawaii, Hemicorallium grow in height about 0.25−0.43 cm/yr, I would assume a similar rate for these corals we are seeing [18:44:19] Pentameticrinus [18:44:29] we have not, Kevin. We could certainly take a look [18:45:06] five armed crinoids are unusual [18:45:07] tinamolodtsova leaves the room [18:48:02] meaganputts leaves the room [18:48:27] LAT : 35.262505 , LON : -48.0019 , DEPTH : 1734.0558 m, TEMP : 3.90117 C, SAL : 34.9946 PSU, DO : 8.12389 mg/l [18:50:28] noellehelder leaves the room [18:50:57] vondawarehamhayes leaves the room [18:52:18] meaganputts leaves the room [18:53:28] LAT : 35.26245 , LON : -48.001955 , DEPTH : 1734.4294 m, TEMP : 3.90023 C, SAL : 34.99753 PSU, DO : 8.18362 mg/l [18:54:27] meaganputts leaves the room [18:55:34] interesting fossil coral substrate divide. [18:56:37] oh wow! arm on the upper right hand side.. starfish? [18:58:21] meaganputts leaves the room [18:58:29] LAT : 35.262293 , LON : -48.001758 , DEPTH : 1726.1435 m, TEMP : 3.92814 C, SAL : 34.99978 PSU, DO : 8.1285 mg/l [19:00:26] meaganputts leaves the room [19:01:50] I don't think it is a rattail [19:01:52] vondawarehamhayes leaves the room [19:01:54] Moridae [19:02:25] codling fish [19:03:29] THanks Mike & Megan! [19:03:30] LAT : 35.262399 , LON : -48.001699 , DEPTH : 1723.5716 m, TEMP : 3.92814 C, SAL : 34.99891 PSU, DO : 8.15799 mg/l [19:05:39] meaganputts leaves the room [19:06:28] oh nice! we'll get some ophs and crinoids off that rock! [19:06:36] Plenty of bonus critters [19:07:01] looks like a piece of dead coral rather than a rock [19:08:30] LAT : 35.262268 , LON : -48.001606 , DEPTH : 1723.0221 m, TEMP : 3.94024 C, SAL : 34.99526 PSU, DO : 8.13783 mg/l [19:10:29] Candidella imbricata with lots of commensals [19:12:02] Another big crinoid [19:13:31] LAT : 35.262165 , LON : -48.001556 , DEPTH : 1714.548 m, TEMP : 3.94118 C, SAL : 34.99944 PSU, DO : 8.1324 mg/l [19:16:54] vondawarehamhayes leaves the room [19:17:29] Swiftia [19:18:00] leswatling leaves the room [19:18:01] its a type of Plexaurid [19:18:32] LAT : 35.262091 , LON : -48.001465 , DEPTH : 1712.0069 m, TEMP : 3.95671 C, SAL : 35.00192 PSU, DO : 8.13856 mg/l [19:18:40] Kira some kind of mysid or shrimp [19:19:09] thanks, Chris [19:19:31] can we zoom on the star? [19:20:05] meaganputts leaves the room [19:21:06] Lophaster or possibly a korethrasterid [19:21:13] either way.. its a new record for this area [19:21:46] yes nice! thank you! [19:21:59] urchin looked like Echinus [19:22:11] @meagan - does switfia encrust? we saw a similar structure coral a few days ago but it was encrusting on another coral skeleton [19:22:12] meaganputts leaves the room [19:22:33] star on the left.. we passed humped over something [19:23:33] LAT : 35.262107 , LON : -48.001196 , DEPTH : 1703.2596 m, TEMP : 3.95466 C, SAL : 35.00174 PSU, DO : 8.13806 mg/l [19:27:02] vondawarehamhayes leaves the room [19:28:01] Swiftia is not known to encrust on other corals but could possibly attach to dead skeleton. What you saw could possibly be a Stoloniferan which is an encrusting type of octocoral. [19:28:34] LAT : 35.261937 , LON : -48.001014 , DEPTH : 1698.7211 m, TEMP : 3.99037 C, SAL : 35.00595 PSU, DO : 8.11134 mg/l [19:28:45] Funky rock. Will be a fun surprise when cut open. [19:29:42] I have been noticing that all the corals and sponge fans are facing in the same direction, that's usually an indicator of the average current direction at this location [19:30:54] starfish off to the right [19:31:01] jocelyncooper leaves the room [19:32:13] setting up to leave [19:33:06] leswatling leaves the room [19:33:35] LAT : 35.261862 , LON : -48.001104 , DEPTH : 1699.0631 m, TEMP : 3.99076 C, SAL : 35.00575 PSU, DO : 8.11297 mg/l [19:33:39] cookie star [19:33:49] Mediaster or Ceramaster [19:33:54] a goniasterid [19:34:14] much thanks! [19:34:36] so many stars! [19:34:51] @Kevin, highly altered basalt, my guess :) [19:34:59] ha ha! yes! [19:35:05] upasanaganguly leaves the room [19:35:06] Thanks all! Different but interesting dive today [19:35:22] @kira I'm guessing a granite :) [19:35:26] Thank you all! [19:35:26] kelseyviator leaves the room [19:35:29] jaymesawbrey leaves the room [19:35:35] meaganputts leaves the room [19:35:43] oh snap! [19:35:43] christophermah leaves the room [19:35:49] we shall see [19:35:59] Great work today. See ya, tomorrow. Hopefully more loose rocks and high density communities. [19:36:02] EX2104_DIVE10 ROV Ascending [19:36:19] leswatling leaves the room [19:36:53] thanks all for another great dive - different but equally important! [19:36:59] rhianwaller leaves the room [19:37:10] kevinkonrad leaves the room [19:37:27] vondawarehamhayes leaves the room [19:38:07] thanks y'all [19:38:35] LAT : 35.262456 , LON : -48.001617 , DEPTH : 1624.0719 m, TEMP : 4.14915 C, SAL : 35.02753 PSU, DO : 8.08246 mg/l [19:38:43] haroldcarlson leaves the room [19:42:46] kiramizell leaves the room [19:43:36] LAT : 35.262184 , LON : -48.001543 , DEPTH : 1474.8288 m, TEMP : 4.34436 C, SAL : 35.03759 PSU, DO : 8.06575 mg/l [19:43:46] jasonchaytor leaves the room [19:47:03] georgematsumoto leaves the room [19:48:36] LAT : 35.262316 , LON : -48.001648 , DEPTH : 1333.7205 m, TEMP : 4.20519 C, SAL : 34.97906 PSU, DO : 8.35607 mg/l [19:51:32] Poralia [19:53:37] LAT : 35.262197 , LON : -48.001748 , DEPTH : 1181.1141 m, TEMP : 4.57804 C, SAL : 35.01356 PSU, DO : 8.14737 mg/l [19:58:37] LAT : 35.262175 , LON : -48.001929 , DEPTH : 1032.1033 m, TEMP : 4.92628 C, SAL : 35.04585 PSU, DO : 7.94149 mg/l [20:03:37] LAT : 35.262121 , LON : -48.001803 , DEPTH : 888.0803 m, TEMP : 5.86557 C, SAL : 35.16019 PSU, DO : 7.27713 mg/l [20:08:38] LAT : 35.262164 , LON : -48.001787 , DEPTH : 743.1281 m, TEMP : 7.00366 C, SAL : 35.21489 PSU, DO : 6.57281 mg/l [20:10:45] michaelvecchione leaves the room [20:13:38] LAT : 35.26215 , LON : -48.001794 , DEPTH : 586.1456 m, TEMP : 8.16085 C, SAL : 35.15329 PSU, DO : 5.54979 mg/l [20:18:39] LAT : 35.26218 , LON : -48.001687 , DEPTH : 439.4252 m, TEMP : 10.87466 C, SAL : 35.36383 PSU, DO : 5.08057 mg/l [20:23:39] LAT : 35.262114 , LON : -48.001731 , DEPTH : 291.4048 m, TEMP : 14.64527 C, SAL : 35.87365 PSU, DO : 5.92553 mg/l [20:28:40] LAT : 35.261922 , LON : -48.001483 , DEPTH : 142.6791 m, TEMP : 17.38617 C, SAL : 36.3505 PSU, DO : 6.99242 mg/l [20:33:40] LAT : 35.261826 , LON : -48.001366 , DEPTH : 50.3859 m, TEMP : 19.77669 C, SAL : 36.45703 PSU, DO : 7.97105 mg/l [20:38:41] LAT : 35.261817 , LON : -48.001045 , DEPTH : 50.9624 m, TEMP : 19.57338 C, SAL : 36.45133 PSU, DO : 7.94339 mg/l [20:43:42] LAT : 35.262919 , LON : -48.002713 , DEPTH : 43.103 m, TEMP : 20.0254 C, SAL : 36.46499 PSU, DO : 7.99466 mg/l [20:46:26] EX2104_DIVE10 ROV on Surface [21:05:52] EX2104_DIVE10 ROV Recovery Complete [21:07:23] iscwatch leaves the room [22:52:23] noellehelder leaves the room