[00:05:42] asakomatsumoto leaves the room [00:22:32] Alexis Weinnig leaves the room [00:54:17] Amy Wagner leaves the room [01:24:31] Amy Wagner leaves the room: Replaced by new connection [02:16:14] Amy Wagner leaves the room [03:15:51] kaseycantwell leaves the room [10:47:15] Testing [11:01:14] Alexis Weinnig leaves the room [11:27:41] kaseycantwell leaves the room [11:44:37] EX1903L2_DIVE14 ROV powered off [12:16:38] EX1903L2_DIVE14 ROV Launch [12:24:05] EX1903L2_DIVE14 ROV on Surface [12:24:52] EX1903L2_DIVE14 ROV Descending [12:25:34] LAT : 35.734619 , LON : -74.812456 , DEPTH : 16.413 m, TEMP : 26.50209 C, SAL : 36.10322 PSU, DO : 6.60368 mg/l [12:30:35] LAT : 35.735251 , LON : -74.812044 , DEPTH : 51.8406 m, TEMP : 12.35203 C, SAL : 34.05668 PSU, DO : 7.67695 mg/l [12:35:35] LAT : 35.73525 , LON : -74.812216 , DEPTH : 193.6285 m, TEMP : 12.85685 C, SAL : 35.65165 PSU, DO : 4.6187 mg/l [12:40:36] LAT : 35.734831 , LON : -74.812085 , DEPTH : 353.5321 m, TEMP : 8.08138 C, SAL : 35.14558 PSU, DO : 5.06298 mg/l [12:42:04] robertcarney leaves the room [12:45:36] LAT : 35.734422 , LON : -74.812245 , DEPTH : 359.193 m, TEMP : 8.00478 C, SAL : 35.13912 PSU, DO : 5.11489 mg/l [12:50:37] LAT : 35.734298 , LON : -74.812228 , DEPTH : 364.3862 m, TEMP : 7.96948 C, SAL : 35.1372 PSU, DO : 5.11345 mg/l [12:55:37] LAT : 35.733915 , LON : -74.812466 , DEPTH : 421.1724 m, TEMP : 7.13437 C, SAL : 35.10242 PSU, DO : 5.70557 mg/l [12:56:47] When you get a chance can you put up the standard feed three with D2 scanning sonar and Hypack map? [12:58:03] yes, we have a trainee on the video side so I'm waiting until he is done with the ROV guys [12:58:09] Thanks, Adam! [12:58:23] Thanks! [12:59:20] EX1903L2_DIVE14 ROV on Bottom [12:59:57] Mid-water surveys should be good today! [13:00:13] Quill worms are likely Hyalinoecia sp. [13:00:20] yeah, no kidding! This is amazing [13:00:38] LAT : 35.733951 , LON : -74.812548 , DEPTH : 438.7339 m, TEMP : 6.26008 C, SAL : 35.06921 PSU, DO : 6.46714 mg/l [13:01:38] Wow! [13:01:57] @bernie--I was even able to type that quill worm ID in the other day when we had it based on the paper that came out on the Pick Up Sticks site! [13:05:09] so even if we don't find the photogenic seafloor chemo communities, this kind of density of water column life tells you how important the methane is for exporting carbon to the water column and helping to sustain other forms of life [13:05:38] LAT : 35.733765 , LON : -74.812472 , DEPTH : 445.3937 m, TEMP : 6.13325 C, SAL : 35.06319 PSU, DO : 6.5609 mg/l [13:06:03] We've seen quill worms on carbonate hardgrounds and here this looks soft. Bernie or someone else know how they actually live? What substrate they need? [13:07:54] We fond them on hard and soft sediment in 2015 [13:08:19] "Found" [13:09:54] EX1903L2_D14_01B fish that sampled itself into Suction chamber 1 [13:10:13] kaseycantwell leaves the room [13:10:39] LAT : 35.733647 , LON : -74.812603 , DEPTH : 444.1543 m, TEMP : 6.13745 C, SAL : 35.06267 PSU, DO : 6.56772 mg/l [13:13:00] Hyalinoecia artifex ----Cindy worked with a group that IDed these on hardgrounds like that iconic carbonate "cap" with about 7 methane streams from the Nature Geoscience paper [13:13:18] Meyer, K. S., Wagner, J. K. S., Ball, B., Turner, P. J., Young, C. M., and Van Dover, C. L. (2016). Hyalinoecia artifex : Field notes on a charismatic and abundant epifaunal polychaete on the US Atlantic continental margin. Invertebr. Biol., 1–14. doi:10.1111/ivb.12132. [13:13:32] I would not be able to ID a quill worm! [13:15:39] LAT : 35.733646 , LON : -74.812603 , DEPTH : 445.0353 m, TEMP : 6.1542 C, SAL : 35.06245 PSU, DO : 6.5636 mg/l [13:19:25] clams have not been seen this far north (we had them at blake in 2001 and 2003), but there are several species of mussels between blake ridge and baltimore canyon/chincoteague [13:20:02] B. childressi and heckerae mussels [13:20:37] @bernie thanks! I remember childressi because Amanda's paper, but I forgot hekerae [13:20:41] LAT : 35.7335 , LON : -74.812691 , DEPTH : 443.2401 m, TEMP : 6.20071 C, SAL : 35.06489 PSU, DO : 6.81991 mg/l [13:20:44] @carolynruppel @bernardball roger, we will take a zoom when we have a chance [13:21:13] Looks like a B. heckerae shell [13:21:35] Bathymodiolus [13:23:11] we mostly have seen B. heckerae with the DEEPSEARCH work at the deeper seeps [13:25:40] LAT : 35.733574 , LON : -74.812787 , DEPTH : 440.4854 m, TEMP : 6.2023 C, SAL : 35.06501 PSU, DO : 6.75677 mg/l [13:30:40] LAT : 35.733496 , LON : -74.812886 , DEPTH : 437.1251 m, TEMP : 6.26183 C, SAL : 35.07065 PSU, DO : 6.6474 mg/l [13:33:39] another mussel shell in debris just traversed by that crab with the anenome [13:35:41] LAT : 35.733535 , LON : -74.81304 , DEPTH : 431.0259 m, TEMP : 6.47238 C, SAL : 35.07587 PSU, DO : 6.42157 mg/l [13:37:18] Follow mussel shells [13:37:45] carbonate on right? [13:38:11] let's look for living patches of shells [13:38:42] Let us know when/where you want to collect a carbonate rock sample [13:39:10] Bathymodiolus are alive [13:39:11] Livew mussel [13:39:15] live [13:39:29] live recumbent mussels on mud adj bolders [13:39:59] @Amy--You were on DEEPSEARCH...so you know some of the carbonates collected there are to expand the U-Th dating collaborative with our colleagues at BGS. I think you got some carbonate at Pea Island nearby? [13:40:31] cool on the mussels!!! [13:40:41] LAT : 35.733556 , LON : -74.813132 , DEPTH : 428.1444 m, TEMP : 6.51834 C, SAL : 35.08124 PSU, DO : 6.33777 mg/l [13:40:42] @carolynruppel must have been a different Amy. I'm new to this! :) [13:41:08] Looks like Bathymodiolus childressi. We collected many of them north of here [13:42:18] @carolynruppel let me look back at our sample log from DEEPSEARCH to see if we collected carbonate at Pea Island [13:42:26] extensive "shag" on rock surfaces [13:42:35] More live mussels on the rock there, and behind it [13:42:37] I was looking through Nancy Prouty's paper and figured you would want additional carbonate samples but need to know proximity to the seep sites you want samples [13:44:29] right, we have more work done on the 2015 samples with many more dates, but none right here. Let me ping Nancy re what she collected on last cruise. [13:45:42] LAT : 35.733517 , LON : -74.813142 , DEPTH : 426.912 m, TEMP : 6.62537 C, SAL : 35.08221 PSU, DO : 6.22085 mg/l [13:46:03] @Amy We will see much more carbonate today, so don't worry about sampling here. I texted Nancy to find out what was collected at Pea [13:47:17] Very nice shot of the mussels, thank you. [13:47:49] This is really great. We did some camera work at some other sites at this water depth range between here and Baltimore and didn't find much. We also dove in 2017 at Washington Canyon promontory and didn't find much. So this is great and extends the range of these chemos northward towards Norfolk in this gap [13:48:30] possible target in top left quadrant of Serios scanning sonar (if not tether artifact) [13:49:03] No (apparent) signs of smaller mussels/active recruitment [13:50:28] @carolynruppel ok, thanks [13:50:42] LAT : 35.733533 , LON : -74.813148 , DEPTH : 426.3243 m, TEMP : 6.7455 C, SAL : 35.07875 PSU, DO : 6.16247 mg/l [13:51:00] top most rocks tabulate "shattered pavement" [13:51:07] @bernardball do you have depth ranges for the mussels? [13:51:25] mashkoormalik leaves the room [13:51:45] I'm more familiar with seeing them >1000m [13:52:07] @Alexis: I believe there are mussels at Baltimore, and that site is 400 m or so...Amy has the paper there. [13:52:17] We found them B. childressi as shallow as 305 m, in 2015 [13:52:30] @bernie thanks! [13:52:57] @bernardball and @carolynruppel thanks! [13:53:14] @Alexis mussel ranges expand w/ discovery. Things called "Childressi" generally start at ~~ 450m and then become replaced by other congeners deeper than 1000m [13:55:43] LAT : 35.733536 , LON : -74.813273 , DEPTH : 425.7001 m, TEMP : 6.66885 C, SAL : 35.08245 PSU, DO : 6.14234 mg/l [13:55:47] @robertcarney thanks - very good point about discovery [13:55:51] bolder in scour or bubble-excavated depression [13:55:58] The B. heckerae we spotted in 2015 were in Norfolk West, around 1400 m [13:56:22] correction, 1500 m [13:56:45] @carolynruppel in our sample sheet from the Deepsearch cruise in April 2019 we did sample a few rocks (~~6) at Pea Island [13:57:03] Hello all [13:57:14] Hi @asakomatsumoto :) [13:57:22] Hi @Alexis [14:00:43] LAT : 35.733496 , LON : -74.813305 , DEPTH : 425.1329 m, TEMP : 6.61502 C, SAL : 35.0814 PSU, DO : 6.17524 mg/l [14:03:06] Some longer disarticulated shells [14:05:44] LAT : 35.733558 , LON : -74.813417 , DEPTH : 421.267 m, TEMP : 6.64521 C, SAL : 35.08252 PSU, DO : 6.13583 mg/l [14:10:37] @robertcarney, are bubble-excavated depressions created in a single event, or gradually over time? [14:10:44] LAT : 35.733614 , LON : -74.813649 , DEPTH : 419.2284 m, TEMP : 7.07553 C, SAL : 35.09742 PSU, DO : 5.7861 mg/l [14:15:20] Live mussels [14:15:45] LAT : 35.733679 , LON : -74.813862 , DEPTH : 414.6736 m, TEMP : 7.04937 C, SAL : 35.10038 PSU, DO : 5.76806 mg/l [14:19:00] I've never seen such a density of spider crabs [14:19:15] @bernie let me guess what they eat? [14:19:56] Larger patch of live mussels [14:20:45] LAT : 35.73368 , LON : -74.813964 , DEPTH : 412.9491 m, TEMP : 7.05262 C, SAL : 35.09932 PSU, DO : 5.72569 mg/l [14:20:49] @carolyn yes [14:20:57] @bernie I'm not sure there has been such a large patch of mussels at such shallow depths on this margin so far? [14:21:15] @bernie Deeper for sure....Do you know a site? [14:21:57] We found them shallower, but I cannot remember them being in this density [14:22:39] Again, not looking like there are multiple cohorts [14:23:07] Serios sonar spots look like bubbles [14:23:32] No signs of active recruitment again [14:23:35] awesome [14:23:51] YES!!! [14:24:02] we wanted bubbles [14:24:10] Bubbles [14:25:46] LAT : 35.733702 , LON : -74.813996 , DEPTH : 412.5368 m, TEMP : 7.07747 C, SAL : 35.10188 PSU, DO : 5.67365 mg/l [14:26:14] mussel siphons quite extended [14:26:29] Do you want a mussel collection? [14:27:12] Amanda is textingme about that. She just came off our Falkor cruise and is in the car on the way to Portland airport. Is it possible to get some mussels with D2? [14:27:24] surface of mussels also covered with brown mud tubes [14:28:12] @carolynruppel yes, we should be able to [14:29:25] Just to left, very long mussel [14:29:40] B. heckerae would be nice to collect [14:30:46] LAT : 35.733671 , LON : -74.813973 , DEPTH : 413.0199 m, TEMP : 7.06835 C, SAL : 35.09944 PSU, DO : 5.70753 mg/l [14:31:20] If you collect mussels please freeze the sediment tubes on it (possibly capitellid polychaetes and arborescent foraminifera [14:32:08] if we collect mussels - what is the preferred preservative? and do we need to drill a hole in the shell? [14:32:39] @lisalevin is there any other way to preserve the tubes on the shell? Okeanos does not have a -80 freezer [14:32:51] @lisa - our -80 isn't working currently [14:32:54] We can keep them at -20C but just so you know [14:33:09] Have to go, happy exploring. [14:33:13] bernardball leaves the room [14:34:23] @kasey Texting with Amanda now on preserving, or maybe Lisa knows now that Bernie left [14:34:27] well -20 will do for isotope analyses - formalin best for obtaining morphological specimens. [14:34:34] Thanks Carolyn! [14:34:52] we do have formalin - what percent? [14:35:06] 4-8% formalin buffered [14:35:10] collected mussels were apparently not attached to rock...attached to one another lying on sed surface [14:35:47] LAT : 35.733672 , LON : -74.813989 , DEPTH : 413.1539 m, TEMP : 7.20613 C, SAL : 35.10117 PSU, DO : 5.57202 mg/l [14:36:38] It is useful to document all of the fish and invertebrates 'using' this habitat [14:36:50] yes it is @lisalevin [14:37:02] @Lisa - thanks! [14:37:22] that would be helpful! We are doing our best but can always use more help! @lisalevin [14:40:35] "metallic flakes" in sed may be small bits of nacreous shell from inside of mussel shells that have largely dissoved [14:40:47] LAT : 35.733625 , LON : -74.813998 , DEPTH : 412.5274 m, TEMP : 7.1163 C, SAL : 35.10231 PSU, DO : 5.54271 mg/l [14:41:04] @bob excellent point! [14:42:06] @kaseycantwell I have talked with Amanda about sampling for the mussels [14:43:52] @alexis - perfect! [14:44:14] Here is the telecon info is cas anyone else wants to call in - 1-866-617-5860, passcode: 1233796# [14:45:48] LAT : 35.733649 , LON : -74.814069 , DEPTH : 411.9212 m, TEMP : 7.17212 C, SAL : 35.10564 PSU, DO : 5.4861 mg/l [14:50:48] LAT : 35.733609 , LON : -74.814132 , DEPTH : 411.1976 m, TEMP : 7.23668 C, SAL : 35.10738 PSU, DO : 5.48209 mg/l [14:53:37] Suggest going to waypoint 6 [14:53:46] That is the area of highest backscatter [14:54:44] Yes it might be boring for other people but we'd really like to see if there is carbonate at WP 6 [14:55:07] another 100 m covered [14:55:12] 200 meters total [14:55:19] yep we are going to head to WPT6! [14:55:49] LAT : 35.73366 , LON : -74.814223 , DEPTH : 409.6031 m, TEMP : 7.211 C, SAL : 35.10519 PSU, DO : 5.46873 mg/l [14:56:18] carry on a bit more on our current heading and then cut over to WTP 6 when we are in line with it [14:59:12] capitellids from surfaces of vesicomyid clam shells definitely have methane-derived carbon [15:00:49] LAT : 35.73363 , LON : -74.814288 , DEPTH : 408.7497 m, TEMP : 7.18384 C, SAL : 35.10573 PSU, DO : 5.49248 mg/l [15:03:36] Interesting that the high density of shrimp first seen in the water is now gone as we move over the more active chemosynthetic habitat [15:05:50] LAT : 35.733559 , LON : -74.814386 , DEPTH : 408.3307 m, TEMP : 7.23579 C, SAL : 35.10896 PSU, DO : 5.47269 mg/l [15:06:06] @adam Yeah I was thinking that a minute ago too. I have wondered if the high density of water column life is some combo of what is being delivered by currents and what the bottom can provide (e.g., exported carbon to power a lot of biological processes in water column) [15:07:13] For those in the chatroom, WP6 was a high-backscatter 'knoll', so we want to see if there is a good carbonate buildup there. [15:10:50] LAT : 35.733506 , LON : -74.814437 , DEPTH : 409.7724 m, TEMP : 7.21926 C, SAL : 35.10686 PSU, DO : 5.52836 mg/l [15:15:51] LAT : 35.733452 , LON : -74.814602 , DEPTH : 409.387 m, TEMP : 7.21796 C, SAL : 35.10589 PSU, DO : 5.48892 mg/l [15:16:03] Alexis Weinnig leaves the room [15:19:08] upasanaganguly leaves the room [15:20:51] LAT : 35.733264 , LON : -74.814713 , DEPTH : 417.616 m, TEMP : 7.17133 C, SAL : 35.10568 PSU, DO : 5.40777 mg/l [15:22:05] so this is another area with extensive patches of live mussels [15:22:33] lisalevin leaves the room [15:23:18] @carolynruppel yes! they are not seeing anything hard in the D2 sonar [15:23:52] More shrinp [15:24:15] @amy wondering if we will even see carbonate...maybe the high backscatter was caused by the mussels and where they happened to be sitting on more of a promontory [15:24:42] I think it is likely you are seeing bubbles in Serios scanning sonar near field [15:24:47] @carolynruppel yes, that is sort of what I was sondering [15:24:52] *wondering [15:25:21] @adam, yes, it looks like it [15:25:52] LAT : 35.733146 , LON : -74.814745 , DEPTH : 423.2447 m, TEMP : 7.15762 C, SAL : 35.10364 PSU, DO : 5.45305 mg/l [15:26:34] I think the elevated backscatter intensity could be from mussels alone. Do then need hard substrate to settle? [15:27:12] @adam I think they need something fairly hard, but I agree that mussels alone on the local bathy high could be enough to cause the backscatter most likely [15:27:18] question - is a site this extensive at this depth common? [15:27:38] @kasey Baltimore Canyon is the only one at this depth so far that is so extensive as this [15:28:31] @carolynruppel and @kaseycantwell I'm going to ask this on the mic after the pilots do their shift change [15:28:35] I always question if there might be authigenic carbonate just below the sediment. Would still show up as elevated backscatter. [15:28:36] As indicated earlier, we did camera work in 2015 and a dive at Wash Canyon promontory in 2017 and didn't find anything like this at comparable depths. This does bring back memories more of Norfolk Canyon, the two big Chincoteague sites,Blake [15:29:08] Those latter ones are all 1000-1400 m water depth [15:29:29] rachelgulbraa leaves the room [15:30:52] LAT : 35.733108 , LON : -74.814788 , DEPTH : 425.3237 m, TEMP : 7.12159 C, SAL : 35.10182 PSU, DO : 5.48714 mg/l [15:35:53] LAT : 35.73321 , LON : -74.814842 , DEPTH : 422.636 m, TEMP : 7.04806 C, SAL : 35.10233 PSU, DO : 5.50927 mg/l [15:36:30] Let's remember that this is really a "find" today...We haven't discovered a new location with such widespread live mussel beds for awhile now. We shouldn't get jaded. [15:37:27] Any good explanations as to why the mussels seem to be distributed in patches among mud patches of toughly same size? Would slow seepage of dissolved methane within sed? [15:38:01] toughly = roughly [15:39:11] @Adam @Carolyn - this is all perfect!!!!! thank you so much!!! [15:39:46] and @Carolyn - thank for the context of the "find", I really appreciate it! [15:39:59] you all are rockstars! [15:40:13] @bob....Yeah, I don't know. You know as well as I that sometimes the methane sticks to same conduits for a long time and sometimes pops up all over the place at different times. So maybe patches are near where it pops up? Or maybe there is a certain carrying capacity for the amount of methane available subsurface and there are reasons to arrange themselves in clumps? No clue [15:40:53] LAT : 35.733405 , LON : -74.814665 , DEPTH : 414.6538 m, TEMP : 7.1329 C, SAL : 35.10324 PSU, DO : 5.51509 mg/l [15:44:10] @caroyln thanks. I can't recall any especially convincing results about the mussel spatial distribution as it relates to morphology of within sediment "plume" [15:45:54] LAT : 35.73351 , LON : -74.814796 , DEPTH : 409.3345 m, TEMP : 7.1796 C, SAL : 35.10464 PSU, DO : 5.47504 mg/l [15:46:17] @bob someone should do that study, but it won't be easy! [15:46:23] mussels are getting reduced material from water using siphons. Some "clams" use foot within sediment. [15:47:14] Wow, look at the Serios scanning sonar. Bubbles everywhere. [15:48:29] Wow! That is remarkable! [15:50:43] Cool! [15:50:54] LAT : 35.73351 , LON : -74.814793 , DEPTH : 409.7535 m, TEMP : 7.05188 C, SAL : 35.0936 PSU, DO : 5.4169 mg/l [15:53:01] thin white tubes problematic...maybe agglutinated tubes using very fine elemental sulfur particles. [15:55:54] LAT : 35.733521 , LON : -74.814814 , DEPTH : 409.6717 m, TEMP : 7.02624 C, SAL : 35.08625 PSU, DO : 5.55568 mg/l [16:00:55] LAT : 35.733505 , LON : -74.814826 , DEPTH : 410.1377 m, TEMP : 6.88208 C, SAL : 35.09635 PSU, DO : 5.67563 mg/l [16:05:55] LAT : 35.733573 , LON : -74.814832 , DEPTH : 407.4213 m, TEMP : 7.05 C, SAL : 35.07682 PSU, DO : 5.46453 mg/l [16:07:08] reminds me of mold on blue cheese...a slice would be interesting [16:08:22] carbonate rubble [16:10:56] LAT : 35.733494 , LON : -74.815031 , DEPTH : 404.8412 m, TEMP : 7.14422 C, SAL : 35.10468 PSU, DO : 5.51043 mg/l [16:13:14] great many sepulid tubes? [16:13:18] serpulid [16:13:57] mudibranch rt crab [16:14:06] nudibranch [16:14:53] herbertleavitt leaves the room [16:15:52] @Amy Eventually we should get a carbonate sample, but I think we might want to wait awhile 'til we see good outcrops.... [16:15:56] LAT : 35.733511 , LON : -74.815149 , DEPTH : 402.7676 m, TEMP : 7.07113 C, SAL : 35.10758 PSU, DO : 5.52399 mg/l [16:20:57] LAT : 35.733499 , LON : -74.815117 , DEPTH : 402.906 m, TEMP : 7.14484 C, SAL : 35.10287 PSU, DO : 5.4328 mg/l [16:21:58] wow! [16:22:02] quite the carbonate [16:23:06] @Amy @Alexis....If we can get a sample from something that looks like intact outcrop in this area, that would be great. You know the routine...want to break it off, not pick it up off the seafloor [16:23:46] okay will try and do that @carolynruppel [16:23:52] thanks for the guidance [16:24:09] good to have a geologist out there... [16:24:56] wow [16:25:46] This rock was likely responsible for the elevated backscatter intensity near this location [16:25:57] LAT : 35.733479 , LON : -74.815197 , DEPTH : 401.6819 m, TEMP : 7.13385 C, SAL : 35.10274 PSU, DO : 5.43036 mg/l [16:28:00] nice clump of live mussels at upper center [16:30:58] LAT : 35.733496 , LON : -74.8152 , DEPTH : 401.7502 m, TEMP : 7.14547 C, SAL : 35.10171 PSU, DO : 5.39673 mg/l [16:32:18] thank you for standing up for geologic provenance [16:33:14] my pleasure @carolynruppel :) [16:34:15] Had to leave for a few hours... missed the serpulid tubes - does anyone have a picture of these? [16:34:37] I do. [16:34:38] were any collected? [16:34:58] I can email what I have to you, @lisalevin [16:35:07] They were cemented to the rock, none were collected [16:35:17] @lisa great many small spiral tubes on rock, but I did not see any extended tentacles [16:35:31] New paper just submitted by Goffredi et al. showing some serpulids near seeps have symbionts that can use methane [16:35:58] LAT : 35.733465 , LON : -74.815222 , DEPTH : 401.0678 m, TEMP : 7.14081 C, SAL : 35.10262 PSU, DO : 5.41919 mg/l [16:36:03] please mail serpulid pics to llevin@ucsd.edu [16:36:44] @Amy @ Alexis This is not going to well on the rock sampling. Usually it is so crumbly. If they can't do it, maybe we'll find a better a place later on. [16:39:30] @lisa I've just emailed you the screenshots I have with serpulid tubes. They aren't the best, but it's what I have [16:40:12] badly wounded hake [16:40:59] LAT : 35.733488 , LON : -74.815199 , DEPTH : 401.6626 m, TEMP : 7.14484 C, SAL : 35.10312 PSU, DO : 5.47565 mg/l [16:41:13] Thank you! [16:41:22] :D [16:42:05] @taraluke thanks very much! [16:42:42] what is the name of today's site? [16:43:19] Bodie Island Seep [16:43:23] We are calling this Bodie Island Seep [16:43:34] @Lisa any time! [16:44:15] @Alexis thanks! [16:44:24] It is approximately offshore of Bodie Island NC, and I suspected we might find something good here so didn't want to call it a name subsidiary to Pea Island (3.5 km south of here), where the vestimentiferan worm was found in April. [16:45:11] Figure this should have its own name... [16:45:36] @carolynruppel good call! [16:45:57] @Amy not the first rodeo [16:46:00] LAT : 35.733458 , LON : -74.815198 , DEPTH : 402.4272 m, TEMP : 7.16149 C, SAL : 35.10263 PSU, DO : 5.60145 mg/l [16:46:59] white dots great many [16:47:11] please zoom so we can see what is creating the rock texture - are these organisms? [16:47:33] pycnogonid [16:48:16] these look like spirorbids.. (tiny circles?) [16:48:30] can we collect any? [16:48:53] rock crust surrounding void [16:50:11] @lisalevin We might be able to if we see them at a different spot [16:51:00] LAT : 35.733435 , LON : -74.815168 , DEPTH : 399.0533 m, TEMP : 7.15987 C, SAL : 35.10491 PSU, DO : 5.52116 mg/l [16:52:16] quite a seep 'sphere of influence' [16:54:48] Not a lot of associates? does that have any significance? [16:56:00] LAT : 35.733439 , LON : -74.815171 , DEPTH : 399.4678 m, TEMP : 7.17526 C, SAL : 35.10339 PSU, DO : 5.53586 mg/l [16:57:57] Great view of patchy distribution of both mats and mussels her [16:58:33] wow [16:59:01] could we zoom into the rock wall to see if there are serpulid tubes? [17:01:01] LAT : 35.733517 , LON : -74.815295 , DEPTH : 399.1609 m, TEMP : 7.15228 C, SAL : 35.10206 PSU, DO : 5.5356 mg/l [17:01:24] thanks - they are spirorbid tubes - too fast for a screen shot though [17:01:41] "spirorbid-like serpulids every where, rock and mussel shells [17:01:54] nubibranch [17:03:49] @ carolyn & adam is there high-res topo of this site? Is rock exposure a topo high...a ridge...or what [17:04:53] I have high res bathy from the northern part of this track, and Adam has pulled together the EX data too, as has Shannon out on the ship now. She showed it on the pre-dive call or look at the dive plan for today. [17:05:19] I will have to look where we are on those maps, but I don't remember anything this spectacular showing up. [17:06:01] LAT : 35.733507 , LON : -74.815205 , DEPTH : 399.4597 m, TEMP : 7.13029 C, SAL : 35.10256 PSU, DO : 5.58348 mg/l [17:07:12] Alexis Weinnig leaves the room [17:07:28] @ carolyn, thanks, massiveness of boulders more like W Fla Escp than exposed authigenics I've seen in GoM [17:07:33] all those mud tubes under the sea star are really interesting [17:08:24] @bob Look at the slope map in the dive plan...There are some big slopes. I agree that we have never seen big boulders of carbonate like this in East Coast dives. Hatteras area is always different though. [17:09:34] @carolyn, thanks [17:09:38] @robertcarney NOAA bathymetry is about 25m^2 resolution and does not show rock exposure. Backscatter is elevated. We are on the side of a ridge but erosion is surprising. Other authigenic carbonate on Atlantic margin are flat lining pavement or mounded. Nothing like this. [17:10:15] *flat lying [17:10:40] @adam thanks...maybe more than one geological theme played out here [17:10:48] indeed [17:11:02] LAT : 35.733514 , LON : -74.815215 , DEPTH : 400.0653 m, TEMP : 7.12431 C, SAL : 35.10271 PSU, DO : 5.41588 mg/l [17:11:48] worm tubes seem to have a simple-headed inhabitant [17:13:03] or you are seeing the operculum [17:16:02] LAT : 35.733712 , LON : -74.815135 , DEPTH : 399.8046 m, TEMP : 7.12625 C, SAL : 35.10138 PSU, DO : 5.47554 mg/l [17:21:03] LAT : 35.733888 , LON : -74.815115 , DEPTH : 396.4866 m, TEMP : 7.13662 C, SAL : 35.10248 PSU, DO : 5.54618 mg/l [17:21:11] @Amy and @Alexis one if you is much quieter than I think you were earlier in the dive [17:21:42] thanks @taraluke checking our mics now [17:23:50] clappid - like crab [17:26:03] LAT : 35.733936 , LON : -74.815215 , DEPTH : 395.7606 m, TEMP : 7.14165 C, SAL : 35.0981 PSU, DO : 5.59974 mg/l [17:26:19] large burrow near clappid crab [17:30:05] scattered tabulate boulders [17:31:04] LAT : 35.734222 , LON : -74.815272 , DEPTH : 392.7588 m, TEMP : 7.18672 C, SAL : 35.10279 PSU, DO : 5.5769 mg/l [17:33:19] cerianthid long exposed tube...erosional? [17:35:31] kaseycantwell leaves the room [17:36:04] LAT : 35.734344 , LON : -74.815366 , DEPTH : 392.0388 m, TEMP : 7.49734 C, SAL : 35.10394 PSU, DO : 5.38411 mg/l [17:36:56] Alexis Weinnig leaves the room [17:38:35] It looks kind of like a tonguefish [17:38:47] Cynoglossidae? [17:40:42] that's what I was thinking, but I'm very much not a fish expert [17:41:05] LAT : 35.734417 , LON : -74.815304 , DEPTH : 395.4533 m, TEMP : 7.32436 C, SAL : 35.13838 PSU, DO : 5.47525 mg/l [17:46:05] LAT : 35.734425 , LON : -74.815393 , DEPTH : 394.3793 m, TEMP : 7.6547 C, SAL : 35.0945 PSU, DO : 5.26775 mg/l [17:47:49] more typical morphology for carbonate slabs than at the last site with its boulders [17:48:42] are there living bivalves here? [17:49:40] nary a mussel in sight [17:51:06] LAT : 35.734378 , LON : -74.815522 , DEPTH : 392.7245 m, TEMP : 7.45322 C, SAL : 35.11395 PSU, DO : 5.33798 mg/l [17:55:17] @carolynruppel and @adam are you guys okay with altering the track a little to come back a little south? [17:55:59] That sounds fine [17:56:03] We will still will hit all of the way points, it just might be in more of a zig-zag manner [17:56:06] @Amy --you should do whatever you need based on the best data you have available [17:56:07] LAT : 35.734234 , LON : -74.815641 , DEPTH : 390.6046 m, TEMP : 7.50688 C, SAL : 35.11692 PSU, DO : 5.33107 mg/l [17:56:26] Okay, thanks @carolynruppel and @adam [17:56:31] @Amy Are we going to fast or do you think the WP are not on the features? [17:56:35] too fast [17:58:09] It just seems like the seeps are more to the south of the ridge and we have crossed over to the north so just trying to get back [17:59:07] @Amy I would base the decisions on the best data...which may be Shannon's. There is always some imprecision in these determinations. [17:59:50] @okay, we are taking a look now [18:00:38] @Amy Especially b/c the plumes on the western part of dive track seemed better than those on the east...wouldn't want to miss the plumes on the west [18:01:06] LAT : 35.734199 , LON : -74.815886 , DEPTH : 389.511 m, TEMP : 7.51745 C, SAL : 35.12007 PSU, DO : 5.29831 mg/l [18:06:07] LAT : 35.734296 , LON : -74.815975 , DEPTH : 389.1841 m, TEMP : 7.32875 C, SAL : 35.11017 PSU, DO : 5.43167 mg/l [18:06:35] @carolynruppel we are rethinking after looking at the data with Shannon. If you look at camera 3 we are putting the bathymetry with the plumes up [18:07:35] The pilots had suggested going back south to look more for plumes in the line that we originaly were on for WPT 1-7 but it looks like the plumes to the north west are what we want to be on for the rest of the dive [18:08:06] and hopefully the end of the dive track will be at the area to the west with the plume data shown in blue and pink [18:08:09] @Alexis I agree with you. The dive track is parallel and to the south of where we want to be. We need to shift north [18:08:16] I agree. I think we want to be on the line to the NW [18:08:29] ending large plume [18:09:23] @Alexis Can Shannon update WP to put us right down the middle of the line of seeps? [18:09:29] Yes, agreed. The pilots are heading north now and we suggested that they go a little north past the waypoint if we don't see anything right away [18:09:41] If anything, I would search slightly north of targets 8-11 [18:10:15] Really attests to how you have to be in the right place on seafloor to see something. Lucky the acoustics helps us find interesting spots. That just wasn't the case 15-20 years ago [18:11:07] LAT : 35.734515 , LON : -74.816061 , DEPTH : 394.0337 m, TEMP : 7.25801 C, SAL : 35.11435 PSU, DO : 5.44877 mg/l [18:12:30] Thanks @carolynruppel and @adamskarke [18:12:36] we should be working just north of that track line now [18:13:26] lisalevin leaves the room [18:16:08] LAT : 35.734459 , LON : -74.816434 , DEPTH : 393.8924 m, TEMP : 7.39195 C, SAL : 35.11325 PSU, DO : 5.36381 mg/l [18:19:08] Is it possible to get ROV sonar back on Camera 3? [18:19:57] sure thing [18:20:54] Is that good @carolynruppel? [18:21:08] LAT : 35.734499 , LON : -74.816637 , DEPTH : 393.8522 m, TEMP : 7.58952 C, SAL : 35.12062 PSU, DO : 5.23622 mg/l [18:22:46] bubbles [18:22:49] @Alexis..Thanks. Yes, ROV is welcome to put up their full display again if they want...whatever is easier [18:22:59] @bernie You are back! You missed some great stuff [18:23:14] I know, apologies [18:26:09] LAT : 35.734527 , LON : -74.816664 , DEPTH : 395.285 m, TEMP : 7.67948 C, SAL : 35.1218 PSU, DO : 5.14003 mg/l [18:31:09] LAT : 35.734538 , LON : -74.816707 , DEPTH : 395.2434 m, TEMP : 7.67699 C, SAL : 35.11941 PSU, DO : 5.17493 mg/l [18:36:10] LAT : 35.734693 , LON : -74.816727 , DEPTH : 397.7605 m, TEMP : 7.65278 C, SAL : 35.12439 PSU, DO : 5.17236 mg/l [18:41:10] LAT : 35.734889 , LON : -74.816536 , DEPTH : 400.9883 m, TEMP : 7.64161 C, SAL : 35.12184 PSU, DO : 5.18729 mg/l [18:46:11] LAT : 35.734767 , LON : -74.816703 , DEPTH : 399.3229 m, TEMP : 7.70799 C, SAL : 35.12286 PSU, DO : 5.13862 mg/l [18:46:17] herbertleavitt leaves the room [18:48:51] I'm having video feed issues. It keeps cutting out. [18:48:54] bernardball leaves the room [18:49:07] anyone else having video issues? [18:49:14] It might be on my end, because we have a storm going on here. [18:49:31] we will check with our team on this end if it is reoccurring [18:49:45] I was a minute ago but it seems to be gone now [18:49:50] OK, I was wondering the same thing. [18:51:11] LAT : 35.734714 , LON : -74.816878 , DEPTH : 397.0472 m, TEMP : 7.84562 C, SAL : 35.1333 PSU, DO : 5.06584 mg/l [18:51:59] It seems much better now [18:56:12] LAT : 35.734762 , LON : -74.817174 , DEPTH : 395.0744 m, TEMP : 7.92354 C, SAL : 35.13228 PSU, DO : 5.00068 mg/l [19:01:12] LAT : 35.734731 , LON : -74.817331 , DEPTH : 392.5087 m, TEMP : 7.98829 C, SAL : 35.13545 PSU, DO : 4.99184 mg/l [19:06:13] LAT : 35.734724 , LON : -74.817513 , DEPTH : 389.6166 m, TEMP : 8.01259 C, SAL : 35.13448 PSU, DO : 4.90508 mg/l [19:08:31] robertcarney leaves the room [19:09:52] @Alexis So you think we are on top of the line of plumes now? [19:10:58] I think so - let me double check on fledermaus [19:11:13] LAT : 35.734908 , LON : -74.817808 , DEPTH : 387.0296 m, TEMP : 7.93136 C, SAL : 35.13351 PSU, DO : 4.98019 mg/l [19:11:21] yeah we are on top of it [19:11:55] not the big dense portion at the end of the track but north of wpt 11 [19:13:35] furrow in sed rt crab [19:14:36] monofilament fishing line [19:16:14] LAT : 35.734779 , LON : -74.817875 , DEPTH : 383.3979 m, TEMP : 8.07864 C, SAL : 35.13852 PSU, DO : 4.926 mg/l [19:21:14] LAT : 35.73491 , LON : -74.818046 , DEPTH : 381.1426 m, TEMP : 8.12168 C, SAL : 35.14231 PSU, DO : 4.90639 mg/l [19:21:42] oxygen appear to be ascending up into region oxygen minimum [19:24:52] We really got lucky with our waypoints at the beginning of the dive. [19:25:09] well "lucky" is relative… [19:25:12] I doubt the oxygen is low enough to affect distributions here (except for super active animals) [19:25:15] Ox min in west Atlantic not usually considered a physiological barrier [19:25:37] unlike Lisa's favorite places [19:25:49] :-) [19:26:15] LAT : 35.734886 , LON : -74.818265 , DEPTH : 375.9418 m, TEMP : 8.18046 C, SAL : 35.145 PSU, DO : 4.87923 mg/l [19:26:33] we should note that pH and carbonate saturation state also decline when oxygen declines [19:31:15] LAT : 35.734914 , LON : -74.818412 , DEPTH : 371.741 m, TEMP : 8.22071 C, SAL : 35.14641 PSU, DO : 4.83566 mg/l [19:31:57] @Alexis...My screen is too small to see USBL track. Are we zig-zagging up the slope or going straight between the shifted WP? [19:33:05] lisalevin leaves the room [19:34:02] mud with many small round holes [19:34:25] quill worms not so abundant here [19:35:40] cable? [19:35:59] line w/ extensive growth [19:36:16] LAT : 35.734982 , LON : -74.818565 , DEPTH : 367.4961 m, TEMP : 8.3043 C, SAL : 35.15044 PSU, DO : 4.76861 mg/l [19:41:16] LAT : 35.735003 , LON : -74.818828 , DEPTH : 360.0085 m, TEMP : 8.51776 C, SAL : 35.16351 PSU, DO : 4.68198 mg/l [19:41:57] more extensive microbial mats [19:43:43] bubbles [19:46:16] LAT : 35.73489 , LON : -74.818965 , DEPTH : 359.0093 m, TEMP : 8.53232 C, SAL : 35.16375 PSU, DO : 4.66388 mg/l [19:46:33] Alexis Weinnig leaves the room [19:46:43] this looks much more like what I have seen at other sites at these water depths between here and Baltimore...relatively bare seafloor with bubble streams [19:48:48] bottom within grey/white patch looks spongy as with many small voids [19:49:48] small eel pout? [19:49:51] @bob Agree. In some places, these upper slope seds are indurated and sandy, so one gets pipe-like conduits. Here we have discrete conduits, but seafloor seems more spongy [19:51:17] LAT : 35.734949 , LON : -74.818982 , DEPTH : 359.6428 m, TEMP : 8.58526 C, SAL : 35.16518 PSU, DO : 4.65602 mg/l [19:56:17] LAT : 35.734992 , LON : -74.819053 , DEPTH : 357.0024 m, TEMP : 8.61148 C, SAL : 35.17025 PSU, DO : 4.58514 mg/l [19:57:26] looks as though bubble plumes often excavate a shallow pit .... or flow out of an existing bioturbation weakness [19:59:00] fresh paired burrow into grey sediment [19:59:09] I have to go for the day. I'll see you tomorrow! [19:59:44] taraluke leaves the room [20:00:16] @Bob Yes, either ...or : I agree....which came first? A burrow or the excavation of the hollow by gas seepage? [20:01:18] LAT : 35.734913 , LON : -74.819081 , DEPTH : 355.4999 m, TEMP : 8.70266 C, SAL : 35.17508 PSU, DO : 4.58509 mg/l [20:06:19] LAT : 35.734721 , LON : -74.818841 , DEPTH : 361.6136 m, TEMP : 8.66471 C, SAL : 35.17279 PSU, DO : 4.59314 mg/l [20:06:26] @ carolyn/Adam do bubbles flowing from sediment also transport water as with an aquarium bubble pump? [20:08:18] @bob There has been some work on this. [20:08:58] @bob Most bubbles end up behaving physically as "dirty bubbles" soon after emission. Scott Socolofsky has worked on that problem. [20:09:08] @bob Jens Greinert and others have worked on the entrainment issue. [20:09:49]