[00:00:23] it can go with one of the brittl [00:00:29] e star [00:00:44] oh wow. it leaves quite a track [00:00:52] whatever is easiest. [00:00:55] look at that track! [00:01:03] the brittle star can handle it.. [00:01:25] chat-admin leaves the room [00:02:12] star is fine [00:02:22] whatever works. [00:02:44] im gonna go thru the shmutz in the canister as well [00:02:46] if we get any [00:02:50] thanks! [00:02:54] to see what is in the detritus! [00:02:56] You bet! [00:03:11] LAT : 27.399323 , LON : 179.87029 , DEPTH : 4285.0236 m, TEMP : 1.45854 C, SAL : 34.68211 PSU, DO : 4.79297 mg/l, TURBIDITY : 0.0549 FTU [00:03:14] ha ha.. I wonder if those ophiuroids with the brown stuff are filled with poop? no anus [00:03:57] do they eventually explode like mites do? [00:04:44] ha ha maybe we'll find that Astrophiura in there also! [00:04:56] i can only hope! [00:07:42] just fyi troubleshooting software issue on seirios - jar canister is not rotating as expected [00:08:11] LAT : 27.399145 , LON : 179.870232 , DEPTH : 4284.8011 m, TEMP : 1.45752 C, SAL : 34.68396 PSU, DO : 4.77497 mg/l, TURBIDITY : 0.0611 FTU [00:08:39] christophermah leaves the room [00:09:27] the slime star climbed on the filter! smart [00:09:36] *laugh* WHAT? [00:09:58] oh no! [00:10:20] I just saw it climbing on there! [00:10:24] it's not getting out don't worry [00:10:28] oh and it didn't break seirios! [00:10:29] hahahaha [00:10:40] Good sample! [00:10:46] peterauster leaves the room [00:10:56] D13_11B [00:12:59] christophermah leaves the room [00:13:11] LAT : 27.398925 , LON : 179.870059 , DEPTH : 4283.9727 m, TEMP : 1.4681 C, SAL : 34.68134 PSU, DO : 4.66762 mg/l, TURBIDITY : 0.0549 FTU [00:14:30] roger [00:14:58] was that a coral or an anemone? [00:15:15] I think anemone [00:15:34] thanks! [00:15:48] More viscous = more boom [00:16:41] thanks val more viscous = more boom! [00:17:10] no prob! haha [00:17:28] more gas also = more boom [00:17:32] every day is like taking quals again hahaha [00:17:34] thank you! [00:17:36] also more bad jokes [00:17:40] Colossendeis [00:17:42] except my quals were not about volcano [00:17:44] rip [00:17:48] moHAHA [00:17:55] more bad joked [00:17:59] ahahaha [00:18:12] LAT : 27.399397 , LON : 179.870468 , DEPTH : 4275.6946 m, TEMP : 1.45415 C, SAL : 34.68243 PSU, DO : 4.74191 mg/l, TURBIDITY : 0.0488 FTU [00:20:22] lots more of those weird tubes we saw earlier. what are they? [00:20:27] wow, look at all of the traces here! [00:20:43] christophermah leaves the room [00:21:16] is that a big bamboo coming up? [00:21:21] that toppled thing [00:22:13] we think maybe giant calophacus sponge stalk [00:22:17] oh wow [00:22:25] what the [00:22:32] whoa [00:22:37] OH wow. [00:22:42] ehoaaaaaa [00:23:12] LAT : 27.399053 , LON : 179.870516 , DEPTH : 4266.3789 m, TEMP : 1.45602 C, SAL : 34.68435 PSU, DO : 4.78855 mg/l, TURBIDITY : 0.0488 FTU [00:23:37] that's like 2 D2s [00:24:41] pteropod shells [00:24:49] they're very dissolvable... [00:25:02] huh [00:25:12] prob deosited recently but cool! [00:25:21] Rough estimate, but my scale could be wonky [00:25:37] christophermah leaves the room [00:27:26] Wait. Did it suddenly get snowier? [00:27:55] yes but I think the ROV did that [00:27:59] oh! [00:28:02] Ahh, thanks [00:28:08] can we get view of center [00:28:12] LAT : 27.399079 , LON : 179.870319 , DEPTH : 4260.0776 m, TEMP : 1.45481 C, SAL : 34.68605 PSU, DO : 4.7699 mg/l, TURBIDITY : 0.0549 FTU [00:28:24] yes can do view of center after pilot swap [00:28:47] gotta run home. might be back toward the end. thanks again for a great dive! [00:29:24] christophermah leaves the room [00:29:41] kelly what are the rounded ball like things in the center? [00:29:56] those are reproductive pinnules [00:30:01] it's an antedonid [00:30:09] amazing thank you! [00:32:12] have to leave the chat but will checking the stream. enjoy rest of the dive! thank you!! [00:32:16] snow still relatively consistent though [00:32:21] asakomatsumoto leaves the room [00:32:59] thank you asako! [00:33:13] LAT : 27.399155 , LON : 179.870457 , DEPTH : 4253.8382 m, TEMP : 1.45668 C, SAL : 34.68494 PSU, DO : 4.80541 mg/l, TURBIDITY : 0.0672 FTU [00:38:14] LAT : 27.399547 , LON : 179.870804 , DEPTH : 4245.7615 m, TEMP : 1.4708 C, SAL : 34.6845 PSU, DO : 4.78795 mg/l, TURBIDITY : 0.0549 FTU [00:40:13] big traveler [00:40:53] Look how rounded it is. It was part of a big pumice raft, and all of the jostling against other chunks of pumice rounded off the corners [00:42:33] This made the news a few years back https://www.bbc.com/news/world-australia-49469446 [00:43:04] a few very round nodules here [00:43:07] ? [00:43:15] LAT : 27.399649 , LON : 179.87088 , DEPTH : 4238.7963 m, TEMP : 1.45463 C, SAL : 34.68481 PSU, DO : 4.76387 mg/l, TURBIDITY : 0.0549 FTU [00:44:32] One of my officemates during my PhD worked on the Havre pumices (Tonga-Kermadec Arc). That eruption was discovered because someone on a flight was looking out the window and spotted the pumice raft. They got in touch with some volcanologists, who looked at satellite imagery from dates around the flight, and actually tracked down where the pumices came from. It led to the discovery of Havre, which is a large submarine arc volcano. Very cool stuff [00:45:32] I missed the nodules, sorry! [00:45:39] that is an incredible story, thankyou! [00:47:37] It's such a cool story. Volcanoes are amazing places for all of the reasons [00:48:16] LAT : 27.399628 , LON : 179.8707 , DEPTH : 4231.2529 m, TEMP : 1.45716 C, SAL : 34.68394 PSU, DO : 4.82409 mg/l, TURBIDITY : 0.0549 FTU [00:53:16] LAT : 27.399584 , LON : 179.870863 , DEPTH : 4220.9678 m, TEMP : 1.45415 C, SAL : 34.68603 PSU, DO : 4.82847 mg/l, TURBIDITY : 0.0611 FTU [00:55:32] Maybe! That's the hypothesis I want to test here [00:55:40] oooo [00:55:45] love that! [00:55:50] Chemistry is probably mostly independent of depth [00:57:05] Crystallization maybe not either, although not really tested for lavas that are still molten. I think the phenocrysts we see are forming mostly in the magma chamber before eruption, less after eruption [00:57:33] omg, how can you tell that?? [00:57:37] cool thanks [00:57:53] is it in the grains when you do thin sections or are you seeing anything here that suggests that's happening? [00:58:06] Vesiculation, though! Gas content of volcanoes is variable, but Sara can probably attest to the gassiness of even hotspot lavas. Vesicle formation SHOULD be suppressed in lavas erupted at greater depths [00:58:16] LAT : 27.399476 , LON : 179.870961 , DEPTH : 4212.0017 m, TEMP : 1.45421 C, SAL : 34.68297 PSU, DO : 4.77764 mg/l, TURBIDITY : 0.0549 FTU [00:58:54] But the weird thing is that we still dredge up vesicular lavas from >5000 m down. Which speaks to the gas pressure versus hydrostatic pressure! [00:59:08] Sometimes very vesicular . . . which always blows my mind [00:59:54] Sara, were you asking about the chemistry and depth stuff? [00:59:59] that's so freaking cool! [01:00:05] asakomatsumoto leaves the room [01:00:34] Because there are two answers! Depth of eruption shouldn't really mess with chemistry. But depth of where the melting occurs in the mantle TOTALLY can and does affect the chemistry [01:02:12] Val I was wondering if you have thoughts about how/where these basalts formed based on their gross morphology or if thatʻs something you look at later on in lab (via chem or [01:02:23] otherwise [01:02:27] ah sorry got distracted by sponge [01:02:31] thank you!!! [01:03:16] LAT : 27.399694 , LON : 179.871321 , DEPTH : 4205.6426 m, TEMP : 1.45133 C, SAL : 34.68405 PSU, DO : 4.80494 mg/l, TURBIDITY : 0.0488 FTU [01:03:28] If my hypothesis is verified that these are some odd, low-degree partial melts, it's possible that they melted at greater depth in the mantle [01:03:48] The rare earth elements will reveal that part of the story [01:05:00] But who knows for sure! I'm not ruling out another "oh hey, that's funny" moment when some data comes back on these. This is unknown territory for lava petrogenesis, these little things [01:05:10] oo thank you val that is so cool!!!! [01:05:13] so it was not Gaza but still tumbling! [01:05:55] it was not gaza but it was tumbling! [01:07:23] I like pancakes too. The critters here have good taste [01:08:16] LAT : 27.399885 , LON : 179.871072 , DEPTH : 4197.8591 m, TEMP : 1.45403 C, SAL : 34.6834 PSU, DO : 4.80418 mg/l, TURBIDITY : 0.0611 FTU [01:08:49] Photogrammetry of this dive track would be interesting [01:10:19] i agree [01:10:24] should model this bad boy [01:10:42] and there was pteropod shell . very impressive at this depth [01:11:01] yes i agre! so many pteropod shells [01:11:04] very weird! [01:13:17] LAT : 27.399751 , LON : 179.871247 , DEPTH : 4196.3959 m, TEMP : 1.45163 C, SAL : 34.68336 PSU, DO : 4.69244 mg/l, TURBIDITY : 0.0549 FTU [01:13:54] But they are not dissorved at all. [01:14:15] at this depth! [01:14:25] yes not at all! [01:14:31] thatʻs so weird asako! [01:14:46] gonna see if we can use soe niskin water for carbonate chem [01:16:34] sarakahanamoku leaves the room [01:16:47] and we can see scleractinian and gastropod as well.so many observation of "carbonates" [01:17:46] must be interesting carbonate chem here. [01:17:59] yes, so many carbonate producers - which suggests they are either expending a lot of energy to make the shells or calcite sat state is higher than expected [01:18:10] Iʻm going to request that we put aside some of the water for carb chem [01:18:18] LAT : 27.399644 , LON : 179.871356 , DEPTH : 4189.9803 m, TEMP : 1.45421 C, SAL : 34.68371 PSU, DO : 4.66967 mg/l, TURBIDITY : 0.0549 FTU [01:19:29] they must have aragonite! [01:19:35] ooo [01:19:39] we can take a look and find out! [01:19:52] ;) [01:20:59] scleractinian and gastropod usually have aragonite. [01:21:29] octocoral sclerites are calcite [01:21:45] :) [01:23:19] LAT : 27.39973 , LON : 179.871373 , DEPTH : 4181.7107 m, TEMP : 1.44928 C, SAL : 34.68381 PSU, DO : 4.7704 mg/l, TURBIDITY : 0.0488 FTU [01:27:20] If we see any good rocks before end of dive, I wouldn't say to a third. If not, don't sweat it [01:27:35] wouldn't say no, that is [01:27:39] you bet, we will probably try to get it as close to top depth as possible if can? [01:28:15] Sounds good. Just thinking ahead since we're coming close to end of dive [01:28:20] LAT : 27.399981 , LON : 179.871484 , DEPTH : 4178.7262 m, TEMP : 1.44808 C, SAL : 34.68466 PSU, DO : 4.81851 mg/l, TURBIDITY : 0.0488 FTU [01:28:48] ypu bet! and as always if something calls to you we can stop for it [01:28:54] Awesome [01:28:57] have to leave. Thank you for the interesting dive!! [01:29:15] Bathy indicates that D2 might be turning the corner onto the summit area soon [01:29:46] hahahaha [01:31:01] Later, Asako! [01:33:20] LAT : 27.399782 , LON : 179.871578 , DEPTH : 4173.5328 m, TEMP : 1.44983 C, SAL : 34.68075 PSU, DO : 4.76737 mg/l, TURBIDITY : 0.0611 FTU [01:33:20] asakomatsumoto leaves the room [01:33:28] cracked and partly drained. cool! [01:34:43] Which indicates that we're seeing a lot of this stuff more or less as it was originally emplaced. Plus a lot of crustal overgrowth since [01:37:35] little nodules on the sediment patches, I think [01:38:20] LAT : 27.399967 , LON : 179.87183 , DEPTH : 4166.488 m, TEMP : 1.44694 C, SAL : 34.68343 PSU, DO : 4.79401 mg/l, TURBIDITY : 0.0549 FTU [01:38:28] yeah i was wondering if nodule field [01:41:37] I am the Lorax, I speak for the seas [01:43:20] LAT : 27.399986 , LON : 179.871784 , DEPTH : 4164.6784 m, TEMP : 1.45091 C, SAL : 34.68174 PSU, DO : 4.67253 mg/l, TURBIDITY : 0.0549 FTU [01:45:07] can we see the crinoids [01:45:30] something is on ther arms [01:45:34] was that okay? weʻre jamming to surface [01:45:40] sorry **summit [01:45:48] making a lot of oves [01:46:06] i guess it'll have to be [01:46:49] thanks, sorry! [01:48:00] The tiny rubble look pretty nodule-y [01:48:06] yeah not rubble [01:48:08] booo [01:48:20] LAT : 27.400153 , LON : 179.871794 , DEPTH : 4160.196 m, TEMP : 1.44634 C, SAL : 34.6836 PSU, DO : 4.73443 mg/l, TURBIDITY : 0.0549 FTU [01:48:23] The seamounts give as they will! [01:49:04] I don't see great prospects for lava here. Prioritize sed? [01:49:17] val thoughts on getting rocks or moving more [01:49:55] huh yah.... sounds like the seds cant be put into bio boxc [01:50:05] Let's move and get some morpho data on the summit region. These pillows look pretty intact [01:50:15] sweet [01:50:18] can do [01:50:31] some pumice here too [01:51:04] agree, don't see any fragments [01:51:09] oh yeah maybe that [01:51:18] samcuellar leaves the room [01:51:29] top center? [01:51:44] rock o clock [01:51:46] ?? [01:51:50] if can! [01:51:52] letʻs see but looks promising [01:52:12] Not much looks free, but we have science pokes [01:53:20] LAT : 27.400295 , LON : 179.871937 , DEPTH : 4163.1536 m, TEMP : 1.45013 C, SAL : 34.68435 PSU, DO : 4.74979 mg/l, TURBIDITY : 0.0611 FTU [01:54:05] it's also very stuck [01:54:35] samcuellar leaves the room [01:55:46] val can we sed [01:55:59] sed away [01:56:00] weʻre gonna do it [01:56:02] weirdly [01:56:42] that nodule field is actually overlying a ton of sed too [01:57:19] yeah worried about the nodules messing uop the star [01:57:28] Oh geez, good point [01:57:34] Totally forgot [01:57:40] thanks the rock searching burned summit time so weʻre going for this [01:57:43] should be interesting [01:57:57] Good! [01:58:09] thank you! [01:58:21] LAT : 27.400168 , LON : 179.872161 , DEPTH : 4161.3727 m, TEMP : 1.4476 C, SAL : 34.68428 PSU, DO : 4.73173 mg/l, TURBIDITY : 0.0549 FTU [01:58:32] Yeah, rock prospects up here look slim. This reminds me a lot of regular seamounts. Saddle points and fault planes are usually reliable [01:59:14] ahhhh well im glad we got a good sense of the fine-scale features on this thing! [02:00:11] Summit areas are more hit or miss for rocks, and this feature is too small to have big structural failures that expose rocks like on the big platforms, so this is spectacularly intact (unfortunately for hard rock folks!) [02:00:25] I think the two earlier were pretty good though [02:00:54] iʻm glad!! Iʻll take good care of them today! [02:01:01] Awesome! You rock [02:02:21] thank you val I had a great time chatting back and forth with you! [02:03:03] You're welcome, and likewise! I'm glad we were able to get some summit area sediment. That sounded important for your work [02:03:15] than you! Iʻm trying :ʻ) really appreciate it val, so much! [02:03:21] LAT : 27.400516 , LON : 179.872032 , DEPTH : 4160.2964 m, TEMP : 1.44538 C, SAL : 34.6845 PSU, DO : 4.77876 mg/l, TURBIDITY : 0.0549 FTU [02:03:49] sarakahanamoku leaves the room [02:03:59] Cool dive, thank you! [02:04:38] kellymarkello leaves the room [02:05:16] briankennedy leaves the room [02:05:54] valfinlayson leaves the room [02:08:21] LAT : 27.400166 , LON : 179.872062 , DEPTH : 4149.328 m, TEMP : 1.44508 C, SAL : 34.68488 PSU, DO : 4.68109 mg/l, TURBIDITY : 0.0611 FTU [02:13:03] EX2503_DIVE13 ROV Ascending [02:13:22] LAT : 27.400251 , LON : 179.871935 , DEPTH : 4152.2603 m, TEMP : 1.44634 C, SAL : 34.68299 PSU, DO : 4.7592 mg/l, TURBIDITY : 0.0549 FTU [02:18:22] LAT : 27.399581 , LON : 179.871645 , DEPTH : 4001.6283 m, TEMP : 1.44977 C, SAL : 34.68131 PSU, DO : 4.67923 mg/l, TURBIDITY : 0.0549 FTU [02:23:23] LAT : 27.399861 , LON : 179.871389 , DEPTH : 3855.3762 m, TEMP : 1.4592 C, SAL : 34.6787 PSU, DO : 4.5731 mg/l, TURBIDITY : 0.0549 FTU [02:28:23] LAT : 27.399492 , LON : 179.871614 , DEPTH : 3697.5786 m, TEMP : 1.46245 C, SAL : 34.67674 PSU, DO : 4.54072 mg/l, TURBIDITY : 0.0611 FTU [02:29:33] lindasunderland leaves the room [02:33:24] LAT : 27.399865 , LON : 179.871628 , DEPTH : 3552.9475 m, TEMP : 1.47627 C, SAL : 34.67441 PSU, DO : 4.4215 mg/l, TURBIDITY : 0.0549 FTU [02:38:25] LAT : 27.399663 , LON : 179.871706 , DEPTH : 3409.6299 m, TEMP : 1.48708 C, SAL : 34.67443 PSU, DO : 4.34058 mg/l, TURBIDITY : 0.0549 FTU [02:43:26] LAT : 27.399604 , LON : 179.871787 , DEPTH : 3259.7189 m, TEMP : 1.50715 C, SAL : 34.66596 PSU, DO : 4.25613 mg/l, TURBIDITY : 0.0611 FTU [02:45:55] emilymclaughlin leaves the room [02:48:26] LAT : 27.399572 , LON : 179.871897 , DEPTH : 3112.3935 m, TEMP : 1.53147 C, SAL : 34.66459 PSU, DO : 4.14189 mg/l, TURBIDITY : 0.0549 FTU [02:52:37] chat-admin leaves the room [02:53:27] LAT : 27.399378 , LON : 179.872196 , DEPTH : 2959.7361 m, TEMP : 1.56052 C, SAL : 34.66293 PSU, DO : 3.99455 mg/l, TURBIDITY : 0.0549 FTU [02:58:27] LAT : 27.399389 , LON : 179.872363 , DEPTH : 2801.5303 m, TEMP : 1.60532 C, SAL : 34.65433 PSU, DO : 3.83507 mg/l, TURBIDITY : 0.0488 FTU [03:03:27] LAT : 27.399433 , LON : 179.872314 , DEPTH : 2644.8377 m, TEMP : 1.64027 C, SAL : 34.64891 PSU, DO : 3.6491 mg/l, TURBIDITY : 0.0549 FTU [03:08:28] LAT : 27.399437 , LON : 179.872399 , DEPTH : 2489.7436 m, TEMP : 1.69036 C, SAL : 34.64157 PSU, DO : 3.49358 mg/l, TURBIDITY : 0.0549 FTU [03:13:29] LAT : 27.399373 , LON : 179.87242 , DEPTH : 2341.3173 m, TEMP : 1.75236 C, SAL : 34.63259 PSU, DO : 3.30396 mg/l, TURBIDITY : 0.0549 FTU [03:18:30] LAT : 27.399403 , LON : 179.872473 , DEPTH : 2175.1713 m, TEMP : 1.84126 C, SAL : 34.62166 PSU, DO : 3.08606 mg/l, TURBIDITY : 0.0549 FTU [03:23:30] LAT : 27.399736 , LON : 179.872446 , DEPTH : 2023.2437 m, TEMP : 1.93832 C, SAL : 34.61042 PSU, DO : 2.87165 mg/l, TURBIDITY : 0.0549 FTU [03:26:56] chat-admin leaves the room [03:28:30] LAT : 27.399851 , LON : 179.872369 , DEPTH : 1870.5395 m, TEMP : 2.0525 C, SAL : 34.59573 PSU, DO : 2.61187 mg/l, TURBIDITY : 0.0611 FTU [03:33:31] LAT : 27.400226 , LON : 179.872698 , DEPTH : 1710.9297 m, TEMP : 2.20812 C, SAL : 34.57468 PSU, DO : 2.31341 mg/l, TURBIDITY : 0.0549 FTU [03:38:33] LAT : 27.400589 , LON : 179.873136 , DEPTH : 1552.3179 m, TEMP : 2.46423 C, SAL : 34.54363 PSU, DO : 1.88921 mg/l, TURBIDITY : 0.0611 FTU [03:43:33] LAT : 27.40099 , LON : 179.873559 , DEPTH : 1395.0962 m, TEMP : 2.69262 C, SAL : 34.51451 PSU, DO : 1.66117 mg/l, TURBIDITY : 0.0611 FTU [03:48:34] LAT : 27.401309 , LON : 179.874046 , DEPTH : 1238.2381 m, TEMP : 3.0183 C, SAL : 34.4717 PSU, DO : 1.42305 mg/l, TURBIDITY : 0.0672 FTU [03:53:34] LAT : 27.40162 , LON : 179.87447 , DEPTH : 1085.3568 m, TEMP : 3.44129 C, SAL : 34.39835 PSU, DO : 1.07429 mg/l, TURBIDITY : 0.0672 FTU [03:58:34] LAT : 27.402063 , LON : 179.874654 , DEPTH : 931.9305 m, TEMP : 4.04455 C, SAL : 34.30324 PSU, DO : 1.08637 mg/l, TURBIDITY : 0.0611 FTU [04:03:34] LAT : 27.402379 , LON : 179.875104 , DEPTH : 769.903 m, TEMP : 4.77306 C, SAL : 34.16901 PSU, DO : 1.56236 mg/l, TURBIDITY : 0.0672 FTU [04:08:35] LAT : 27.402746 , LON : 179.875369 , DEPTH : 612.6303 m, TEMP : 6.28997 C, SAL : 34.03799 PSU, DO : 3.33353 mg/l, TURBIDITY : 0.0672 FTU [04:13:36] LAT : 27.403247 , LON : 179.876047 , DEPTH : 451.5344 m, TEMP : 9.40166 C, SAL : 34.10436 PSU, DO : 5.55175 mg/l, TURBIDITY : 0.0672 FTU [04:18:36] LAT : 27.403498 , LON : 179.876582 , DEPTH : 294.9163 m, TEMP : 13.21306 C, SAL : 34.37208 PSU, DO : 6.37917 mg/l, TURBIDITY : 0.0611 FTU [04:23:36] LAT : 27.403791 , LON : 179.877156 , DEPTH : 135.9192 m, TEMP : 17.26574 C, SAL : 34.7076 PSU, DO : 6.6453 mg/l, TURBIDITY : 0.0611 FTU [04:28:37] LAT : 27.403853 , LON : 179.877847 , DEPTH : 54.4822 m, TEMP : 20.94231 C, SAL : 35.12546 PSU, DO : 7.30386 mg/l, TURBIDITY : 0.0977 FTU [04:33:38] LAT : 27.403751 , LON : 179.879169 , DEPTH : 58.2172 m, TEMP : 20.30798 C, SAL : 35.04284 PSU, DO : 7.32988 mg/l, TURBIDITY : 0.0977 FTU [04:38:39] LAT : 27.404904 , LON : 179.87938 , DEPTH : 58.8801 m, TEMP : 20.18618 C, SAL : 35.02345 PSU, DO : 7.31855 mg/l, TURBIDITY : 0.1099 FTU [04:43:39] LAT : 27.40553 , LON : 179.877672 , DEPTH : 17.8425 m, TEMP : 23.41866 C, SAL : 35.5033 PSU, DO : 6.96298 mg/l, TURBIDITY : 0.0916 FTU [04:44:36] EX2503_DIVE13 ROV on Surface [04:58:23] EX2503_DIVE13 ROV Recovery Complete [09:30:51] EX2503_DIVE13 ROV powered off [15:48:19] allencollins leaves the room [16:32:51] Test message DIVE14 [17:08:40] chat-admin leaves the room [18:20:35] chat-admin leaves the room [18:26:27] EX2503_DIVE14 ROV Descending [18:27:51] LAT : 27.577962 , LON : -178.50403 , DEPTH : 23.308 m, TEMP : 23.53874 C, SAL : 35.47252 PSU, DO : 6.91989 mg/l, TURBIDITY : 0.0855 FTU [18:32:51] LAT : 27.577801 , LON : -178.503456 , DEPTH : 91.6299 m, TEMP : 21.28064 C, SAL : 35.19335 PSU, DO : 6.75423 mg/l, TURBIDITY : 0.116 FTU [18:36:34] okexnav leaves the room [18:37:52] LAT : 27.577923 , LON : -178.503142 , DEPTH : 243.3314 m, TEMP : 15.31557 C, SAL : 34.54576 PSU, DO : 6.60696 mg/l, TURBIDITY : 0.0611 FTU [18:42:52] LAT : 27.578177 , LON : -178.502849 , DEPTH : 396.955 m, TEMP : 11.60798 C, SAL : 34.26845 PSU, DO : 6.44349 mg/l, TURBIDITY : 0.0672 FTU [18:47:52] LAT : 27.578205 , LON : -178.502745 , DEPTH : 549.9927 m, TEMP : 7.75578 C, SAL : 34.05108 PSU, DO : 4.86592 mg/l, TURBIDITY : 0.0611 FTU [18:52:53] LAT : 27.578179 , LON : -178.502519 , DEPTH : 702.1458 m, TEMP : 5.67554 C, SAL : 34.10443 PSU, DO : 2.43129 mg/l, TURBIDITY : 0.0672 FTU [18:57:54] LAT : 27.578376 , LON : -178.502185 , DEPTH : 853.7489 m, TEMP : 4.52362 C, SAL : 34.22258 PSU, DO : 1.37776 mg/l, TURBIDITY : 0.0611 FTU [19:02:54] LAT : 27.578518 , LON : -178.501868 , DEPTH : 1010.9794 m, TEMP : 3.88834 C, SAL : 34.34214 PSU, DO : 1.11762 mg/l, TURBIDITY : 0.0611 FTU [19:07:39] briankennedy leaves the room [19:07:54] LAT : 27.578561 , LON : -178.501765 , DEPTH : 1164.5823 m, TEMP : 3.35975 C, SAL : 34.43578 PSU, DO : 1.2937 mg/l, TURBIDITY : 0.0611 FTU [19:12:55] LAT : 27.578685 , LON : -178.501569 , DEPTH : 1317.8264 m, TEMP : 3.06466 C, SAL : 34.48976 PSU, DO : 1.59462 mg/l, TURBIDITY : 0.0611 FTU [19:17:56] LAT : 27.578857 , LON : -178.50119 , DEPTH : 1474.7612 m, TEMP : 2.66108 C, SAL : 34.53263 PSU, DO : 1.90571 mg/l, TURBIDITY : 0.0611 FTU [19:22:57] LAT : 27.578905 , LON : -178.500997 , DEPTH : 1628.8802 m, TEMP : 2.42873 C, SAL : 34.55543 PSU, DO : 2.13783 mg/l, TURBIDITY : 0.0611 FTU [19:23:43] kellymarkello leaves the room [19:24:27] chat-admin leaves the room [19:27:57] LAT : 27.579192 , LON : -178.501384 , DEPTH : 1775.8757 m, TEMP : 2.1799 C, SAL : 34.57631 PSU, DO : 2.30953 mg/l, TURBIDITY : 0.0611 FTU [19:29:02] christopherkelley leaves the room [19:32:58] LAT : 27.579502 , LON : -178.501562 , DEPTH : 1920.7541 m, TEMP : 2.03368 C, SAL : 34.59466 PSU, DO : 2.53708 mg/l, TURBIDITY : 0.0549 FTU [19:37:58] LAT : 27.57975 , LON : -178.501594 , DEPTH : 2072.5246 m, TEMP : 1.94816 C, SAL : 34.60492 PSU, DO : 2.66711 mg/l, TURBIDITY : 0.0549 FTU [19:42:59] LAT : 27.579899 , LON : -178.501606 , DEPTH : 2226.4424 m, TEMP : 1.80851 C, SAL : 34.62234 PSU, DO : 3.00291 mg/l, TURBIDITY : 0.0549 FTU [19:47:59] LAT : 27.579794 , LON : -178.501516 , DEPTH : 2327.7807 m, TEMP : 1.79757 C, SAL : 34.62521 PSU, DO : 3.12255 mg/l, TURBIDITY : 0.0611 FTU [19:51:04] Aloha all! getting ready to go with the dive here! Diving on an unnamed seamount south of Holaniku, doing a dogleg on the ridge wall, then up to ridgeline, then up ridge [19:51:38] EX2503_DIVE14 ROV on Bottom [19:51:52] Hello! Good rocks already [19:52:18] val let me know where you'd like to sample! this is along the ridge wall so likely not emplaced, but also good rocks and we can probably assume source? [19:52:26] :-) [19:53:00] LAT : 27.579639 , LON : -178.501233 , DEPTH : 2395.0929 m, TEMP : 1.75446 C, SAL : 34.63159 PSU, DO : 3.21617 mg/l, TURBIDITY : 0.0549 FTU [19:53:18] Any good angular talus would be excellent here [19:53:36] sweet! [19:54:31] is midwater dive likely to be on Thursday? [19:55:49] yes midwater Thursday is the plan currently [19:55:56] YAY!!! [19:57:20] Making sure we preserve that midwater comparison point! [19:57:51] Bathypathes sp [19:58:00] LAT : 27.579623 , LON : -178.501265 , DEPTH : 2394.4043 m, TEMP : 1.75494 C, SAL : 34.63087 PSU, DO : 3.25026 mg/l, TURBIDITY : 0.0611 FTU [19:58:06] that's a big black coral! [19:58:28] to the right [19:58:48] Hello all! [19:58:55] Hi Asako! [19:59:03] Hello Asako! [19:59:07] hello Asako [19:59:26] Hi Chris, Val and Kelly! [20:00:14] Aloha asako, chris, kelly, val, george! [20:00:33] Aloha... [20:00:51] Hi Sara! George! [20:03:01] LAT : 27.579629 , LON : -178.501149 , DEPTH : 2395.337 m, TEMP : 1.7593 C, SAL : 34.63056 PSU, DO : 3.27559 mg/l, TURBIDITY : 0.0611 FTU [20:08:01] LAT : 27.579746 , LON : -178.501343 , DEPTH : 2394.2534 m, TEMP : 1.76235 C, SAL : 34.63247 PSU, DO : 3.24071 mg/l, TURBIDITY : 0.0549 FTU [20:08:19] samcuellar leaves the room [20:08:28] ripple marks in the seds [20:08:33] YES [20:08:37] dead as a doorbell [20:09:20] poke is a good idea [20:09:26] rocks could be deceptive here [20:10:09] haha yeah [20:10:35] Very old mass wasting event [20:10:43] yeah wow [20:12:19] Agree, sediment sample is a good idea here. We won't know how much is further uphill and this is probably going to be the best opportunity [20:13:02] LAT : 27.579692 , LON : -178.501234 , DEPTH : 2395.0355 m, TEMP : 1.76804 C, SAL : 34.62815 PSU, DO : 3.23723 mg/l, TURBIDITY : 0.0488 FTU [20:14:34] looks like ripples suggesting current from N to S? [20:18:03] LAT : 27.579754 , LON : -178.501319 , DEPTH : 2393.8075 m, TEMP : 1.78143 C, SAL : 34.62686 PSU, DO : 3.21843 mg/l, TURBIDITY : 0.3358 FTU [20:18:16] keeping eyes peeled for rocks [20:19:41] what's wrapped around stalk? [20:19:46] overgrown by stoloniferan [20:19:48] looks like aplac? [20:19:52] christophermah leaves the room [20:20:27] Agree, Worth collecting. [20:20:30] skeleton is llooks like Primnoid [20:20:42] agree for the collection [20:20:47] Agree Asako. [20:20:59] great! [20:21:35] georgematsumoto leaves the room [20:22:50] christophermah leaves the room [20:23:04] LAT : 27.579762 , LON : -178.501348 , DEPTH : 2392.0936 m, TEMP : 1.77264 C, SAL : 34.63457 PSU, DO : 3.19811 mg/l, TURBIDITY : 0.0611 FTU [20:24:17] bonus critters always nice [20:24:41] bonus bio! [20:28:02] looks like we got it, got one pilot holding jaw and another helping fly D2 up [20:28:06] LAT : 27.579767 , LON : -178.501427 , DEPTH : 2393.5219 m, TEMP : 1.79022 C, SAL : 34.62469 PSU, DO : 3.15476 mg/l, TURBIDITY : 0.0549 FTU [20:28:08] go pilots! [20:31:07] sarakahanamoku leaves the room [20:33:05] LAT : 27.579737 , LON : -178.501348 , DEPTH : 2394.113 m, TEMP : 1.79237 C, SAL : 34.62599 PSU, DO : 3.10608 mg/l, TURBIDITY : 0.0549 FTU [20:35:49] loose rocks in view? [20:35:59] worth a poke here [20:36:55] I'm thinking pile to right of this big rick, yeah? [20:37:15] yeah, thinking so too [20:37:30] Ramuligorgia [20:38:06] LAT : 27.579823 , LON : -178.501385 , DEPTH : 2388.5937 m, TEMP : 1.81419 C, SAL : 34.62395 PSU, DO : 3.08498 mg/l, TURBIDITY : 0.0611 FTU [20:40:36] christophermah leaves the room [20:40:37] It's gonna be one of those seamounts today, I see how it is! [20:41:27] Okay, let's see what's further uphill for hard rock [20:41:44] Sounds good Val, will keep eyes peeled [20:43:06] LAT : 27.579875 , LON : -178.50137 , DEPTH : 2386.1715 m, TEMP : 1.82345 C, SAL : 34.62239 PSU, DO : 3.06277 mg/l, TURBIDITY : 0.0549 FTU [20:43:45] The answer varies, depending on what kind of dredging you're doing. I've usually done between around 0.5 to 1 km for active dredging (repositioning the ship during the dredge to maximize best dredge angle), and 1-2 km for passive dredging (deploy dredge, move the ship up the track, then pull dredge in while ship holds position) [20:43:49] yes!! [20:43:55] little hyocrinid probably [20:46:19] For dredging, we try to target slopes where we think there's a good chance of talus or at least break off some pieces of lava sticking out from slopes. The advantage there is that we can tug on heavily encrusted rocks and break them off for seamounts like this one. The huge disadvantage is that we don't know what we're damaging that way, compared to ROV. The team I work with tries to dredge as deeply as we can to minimize impact to deep-sea ecosystems. [20:46:36] christophermah leaves the room [20:46:54] peterauster leaves the room [20:47:09] Ah thanks Val for the explanation!! [20:47:28] Some of the old-school folks, I've been told, would dredge up the entire side of a seamount to ensure they got rocks! That's not a strategy I like, so I've been working on some technique development to make it as efficient as I can [20:47:47] The MARSSAM dredge techs are also super talented [20:47:54] Oof, I can only imagine how many critters they mowed over with those dredges... [20:48:05] nodule branching isidid [20:48:08] LAT : 27.579908 , LON : -178.501234 , DEPTH : 2384.0331 m, TEMP : 1.82668 C, SAL : 34.62196 PSU, DO : 3.01873 mg/l, TURBIDITY : 0.0611 FTU [20:49:12] sarakahanamoku leaves the room: Replaced by new connection [20:50:17] lot of rocks here [20:50:31] Actinoscyphia sp [20:50:35] good rocks but all looking real encrusted [20:51:03] maybe some sitting loose on sed? [20:51:22] These are still looking pretty stuck : ( [20:51:26] :( [20:52:42] !! [20:53:01] Ahuastra [20:53:06] yeah. gfoei [20:53:08] oooh [20:53:09] LAT : 27.580003 , LON : -178.501265 , DEPTH : 2380.3358 m, TEMP : 1.82722 C, SAL : 34.62265 PSU, DO : 3.05555 mg/l, TURBIDITY : 0.0488 FTU [20:53:11] ahuastra! [20:53:12] YAY [20:53:35] let's see if it wants to come back with us [20:53:40] have rock, will clock [20:53:45] ie if it'll fit in the van [20:54:42] if not, this might hint at other loose rocks nearby. left center is another possible one if this one refuses to be picked up [20:54:59] Whose's going to take that one into the lab?!!! [20:55:32] get the crowbar ready for recovery! [20:55:52] Thanks, pilots! Good spot on that one [20:56:00] Crowbar? How about forklift? [20:56:09] Chris, that too! [20:56:28] we need a rock hammer on this dang ship [20:56:33] jackhammer in this case i guess [20:56:40] That better not be too altered or we are going to be mad [20:57:00] We brought up one during a Falkor expedition in 2017 that was circa, 75 lb I think? It was a monster to wrangle in the lab [20:57:41] (To be clear, I was not in charge of sampling on that expedition and don't know the reasoning behind that rock. I just was just sample curation) [20:58:08] LAT : 27.57996 , LON : -178.501293 , DEPTH : 2378.0487 m, TEMP : 1.83732 C, SAL : 34.62066 PSU, DO : 2.96566 mg/l, TURBIDITY : 0.0672 FTU [20:58:16] We've collected some really big ones too from Okeanos and Nautilus. [20:59:31] weird chryso [20:59:38] all polyps closed [20:59:50] collect this one/ [20:59:53] ? [20:59:56] maybe [21:00:01] it is wierd [21:00:05] zoom a bit first [21:00:10] I'll bet! I've had a few big ones on Nautilus, but nothing like that Falkor rock [21:00:16] isn't it kind of juv of Metallo? [21:00:25] I was wondering! [21:01:08] Still wondering.... [21:01:19] Asako / Chris do corals hybridize? [21:01:27] Can you zoom out a bit? [21:01:29] well. the size looks large.... [21:01:55] What do you think Asako? Should they sample? [21:02:19] If in doubt I would say yes. [21:02:21] Seems too big to be juvy metallo [21:02:29] any squat? [21:02:36] not seeing squats [21:02:41] No, don't see any [21:02:46] let's collect [21:03:07] okay! collecting! [21:03:09] LAT : 27.580046 , LON : -178.501275 , DEPTH : 2374.9776 m, TEMP : 1.83636 C, SAL : 34.62104 PSU, DO : 3.02217 mg/l, TURBIDITY : 0.0611 FTU [21:03:20]