0859 magnetometer calibration started at 1555m, finished at 0901h at 1617m
0944 109 on bottom 2668m
glassy but lightly sedimented lobate flow composed of broad, low lobes 1-5m diamter and <1m high;
octopus
mostly intact and uncollapsed
0949 119 Lobate flows in the same flow unit as the previous log entry. Some of the lobes are wrinkled or folded with ~10cm fold wavelength and 1-5cm fold amplitude.
0959 sample 1: glassy lobe toe
X: 3066 / Y: 6634
1007 170 flat lobate flows, still <1m high flow lobes
1009 181 nav fixes improving on the A-B line
Lobate flows have roughly the same sediment cover and still covered with intact glass. Lobes now have more relief in some cases up to 1m. Frequently the lobes have collapsed into their hollow interior.
1012 193 Lobates are more extensively collapsed, larger collapse areas several meters wide. Places where entire flow is hollow and collapsed not just individual lobes. Still same sediment cover. Occasional crabs and anemones(?) and some things floating in the water are the only apparent biota.
X:3090 Y:6165
1015 zoarthid(?) fish
1020 216 Chaotically folded sheet flow extending beyond the field-of-view from starboard porthole (over 20m wide). No coherent directional indicators in the folds. Fold amplitudes range from <1 cm to 15 cm, but mostly 4-5 cm. Some pieces of crust thrust turned vertical. All deformation of the crust appears to have been autobrecciation while the flow was still moving.
X:3031 Y:6037
1023 250 Striated flat sheet flow visible with the striations subparallel to the direction of the heading. Flat sheet flow is 5m wide and on either side has chaotically folded sheet flow. This channel is wider than the
1040 240 Returning to the channel found at 1020h, because the flat sheet flow disappeared into the chaotically folded flow. The ground slopes upward in front of the sub, and the pilot sees lobate flows ahead. This is assumed to be the end of the channel.
1044 038 Back at the location of the second sample, trying to follow the original channel. Heading is downslope direction of the channel. Small patches of striated flat sheet flow a few meters wide and few 10's of meters long within the chaotic folded sheet flow.
1047 Flying over the longitudinally striated sheet flow in the channel. Directly below the sub now is a lava coil.
1050 254 Collapse pit within the channel floored with same lava morphology and same lava age as what's surrounding the pit. Isolated stalked crinoids as well as the crabs are the obvious biota of the channel.
1053 255 X:2992 Y:6347 Heading south, because this channel also seems to end in an upward slope. Lava morphology within the channel has been chaotically folded sheet flow. Very rarely, what appear to be wall of smaller channels within the main channel are also visible. These walls have glassy selvages 1-2cm thick. Both of the subchannel wall are not exposed.
1100 217 Chaotically folded sheet flow with same apparent age as everything else seen so far. Light dusting of sediment, but plenty of glassy reflections. Age 1
Sampled a fold at this location and put it into bio box to preserve the easily friable pieces of glass. X:2975 Y:6318
1107 307 Possible battery problems in the second battery make us decide to head west across the chaotic sheet flow to look for the contact at its western boundary.
1109 306 Just crossing contact between chaotic sheet flow and lobate flows. Lobates have very low, broad shape. Some lobes are 5m wide, but not more than 10cm high. The lobes are mostly uncollapsed, or small collapse of individual lobes
1112 305 Flying over a collapse 5-10m deep and 15-20m long. On the floor of collapse is fairly smooth sheet flow. X:2855 Y:6381
1114 304 Contact between Chaotically folded sheet flow and smooth sheet flow. The contact appears gradational and formed by different flow regimes within the same channel. There is patchy sediment all over the flow, but only a thin layer. The width of the flat smooth sheet flow is >10m.
1118 257 2730 6417 Just passed over a contact between Chaotically folded sheet flow and broad lobate flows. Lava age appears to stay constant at Age 1. Lobates are smaller 1-2m diameter and 10-50cm high. Only little collapses in individual lobes.
1123 257 More bulbous lobates and pillows with fresh glassy pillow buds.
1125 256 No pillows here, and much flatter, broader lobate flows. Lobes are mostly 1-2m across and 10-15cm high. White staining in cracks of the lobates.
1128 More bulbous lobates and pillows again. White staining in the cracks is common.
1133 279 X 2436 Y 6320 stopped to take a sample. Should be near the base of the slope of the axial high. Lava morphology is sort of transitional between pillows and lobates. Some true pillows with buds.
1146 259 Chaotically folded sheet flow with collapses that are really more or less local swales with a few (1-3) meters of relief.
1148 In a depression, flying over a bunch of 1m wide and <1m deep channels within the overall Chaotically folded sheet flow. We are apparently within a channel at this point.
1150 Contact between lobates and Chaotically folded sheet flow, looks like the sheet flow is on top of the lobates here.
1156 267 Just underway after taking Sample 5 at X: 2332 Y:6269
Chaotically folded sheet flow. Periodically the sub flys over drop-offs that are 2-3m high. Almost no biota, except for occasional bighead fish swimming and bugs floating in the water. Chaotically folded sheet flow is the only visible lava morphology. Still appears to have some sediment. Age 1
1209 280 X:2067 Y:6217 The middle of a channel carrying Chaotically folded sheet flow that is wider than the field of view here (>20m?). Flying over features that have about the same dimension and shape as inflation tumuli (3-6m high and 20-40m across)
1215 288 Still in the Chaotically folded sheet flow, but the folds are getting smaller and it looks more like a true breccia. The flow looks really broken up into smaller slabs and pieces.
Stalked crinoids.
1218 288 Flying over 5m deep 5-10m wide circular collapse pit. Only flow unit visible is Chaotically folded sheet flow. In the base of the collapse can see a lava tube with at least 10 selvedges on the interior of the tube. Width of tube opening is ~1m, but Chaotically folded sheet flow flows into it.
1220 250 X:1873 Y:2645 Lobate flows, individual lobes are collapsed, lobates have broad and narrow lobes.
1223 324 Collapse pit of 3m depth and 3-4m width. Looks like a lava tube is exposed at the base of the walls of the collapse. Tube is >0.5m in diameter. Outside the collapse are lobates and broadly folded sheet flows (not as chaotic). Small collapses persist that could be skylights into the lava tube.
1226 323 flying perpendicular across a smooth slightly striated sheet flow that is no more than 5m wide.
1241 281 sampled Chaotically folded sheet flow
X:1875 Y:6285
following the folded sheet flow upslope. folds are fairly well-defined but show no organization in their direction. Most folds are very tight (<<10cm) and 5-10cm high slabs
1244 295 still Chaotically folded sheet flow has more directional pattern headed N-NNW. Jumbled and broken sheets organized also into local lobates on top of the sheet flow. Pods of lobates are <10m wide and long.
1248 286 Heading over a drop-off of >5m. Chaotically folded sheet flow on the East of the escarpment. Impressive simple lobate flow, 20-40 cm high, almost pillow-like morphology clearly covering the Chaotically folded sheet flow at the bottom of the escarpment.
1250 268 Predominately lobates and rare pillows on top of the Chaotically folded sheet flow. Some white staining in the cracks of the lobates. No systematic relationship between lobates, pillows and Chaotically folded sheet flow. All appear syneruptive or contemporaneous.
1254 261 Just came over a pit collapse, that drops 3-4m, flow unit is still Chaotically folded sheet flow. Within the escarpment of the collapse is another lava tube x-section. This tube is very elliptical maybe 1m across but only 0.5m high. Could be filled in partly by Chaotically folded sheet flow.
1302 263 Just passed through a main contact between pillows without buds and manganese encrustation AND the Chaotically folded sheet flow of Age 1. Must be Age 3, no glass visible, and sediments thick enough to obscure the fine-scale morphology of the flows.
1314 Sampled a piece of the outer rind of a large (1m diameter) drained out pillow.
1319 079 Just passed back into Chaotically folded sheet flow across the contact with the Age 3 pillows. Will collect a sample here of the Chaotically folded sheet flow at its distal end.
1323 178 Heading south across the Chaotically folded sheet flow after collecting a sample near the contact with the age 3 pillow unit.
1327 161 Lobate flows, mostly uncollapsed with a coating of sediment (Age 1-1.5) out the starboard porthole. The older non-glassy pillows visible out the port side. Contact must trend roughly NNW-SSE through here.
1330 075 back in the Chaotically folded sheet flow. local variations between smooth sheet flow and highly broken up and tightly folded sheets. Small channels up to 1m wide floored with smooth sheet flow appear to be draining southward, off of a median ridge, or large collapse (>10m wide) that is only 5-6m deep.
1335 116 Passing over a contact between lobates and Chaotically folded sheet flow. Within a few meters the lobates were on top of the Chaotically folded sheet flow, then vice versa.
1347 102 Pillows with glassy buds bing overlapped by the Chaotically folded sheet flow. Lots of meter-size collapses. Ridge within the flow are formed by lobate-pillow lavas.
1350 109 X:1679 Y:6070. Chaotically folded sheet flow, organizes into a wrinkled sheet flow then grades into lobates that are broad and 20-30cm high. A little (3m wide) smooth sheet flow channel is under the sub and flowed parallel to present heading.
1353 107 Lost the little smooth sheet flow into Chaotically folded sheet flow.
1356 102 Back into a smooth flat sheet flow that looks a little wider than what we were in before (5-6m). Sheet flow has no distinct striations. It is not longitudinally extensive, no more than 50-60m.
1403 102 back on Chaotically folded sheet flow with glass everywhere and light sediment cover. Little variation in morphology but <6m topographic variations in drop off that look mostly like pits in an inflated flow. Little pits in the crust of the Chaotically folded sheet flow reveal a <1m high hollow core of the flow in some places.
1413 100 organization here is subparallel (100-120) striated sheet flow with large amplitude striations (2-5cm) that appears almost like an organized folded flow.
1421 local collapses or inflation pits (1-2m) rarely floored with smooth sheet flow, but otherwise all Chaotically folded sheet flow.
1426 013 entire spectrum of morphological transition within what appears to be one flow unit. Chaotically folded sheet flow to lobates, to pillows with glassy buds.
1429 016 turning to head 180. will attempt to cross the Chaotically folded sheet flow unit that we have been in for the last hour.
1432 Deep collapses (5-10m) with arches and selvedges floored with breccia. The surrounding of the collapse are broad, low lobates. Surrounding the lobates are the Chaotically folded sheet flow.
1437 197 Chaotically folded sheet flow of the channel is all that can be seen from the starboard side.
1444 Another collapse escarpment with 10's of selvages. Lobates surround the collapse, so the lobates must have been fairly hollow.
1445 354 Edge of the Chaotically folded sheet flow. Appears to come out of a series of several meter deep collapse pits in lobate lavas. Will take this sample from what appears to be the proximal end of the channel. Mostly lobate lava flows outside the collapses.
1505 188 Chaotically folded sheet flow after just coming out of a large area of lobates. Nice contact here of a small lobate flow on top of the folded and broken sheet flow. The lobates appear hollow, and frequently are collapsed in 20-50cm.
1513 194 out the starboard side a contact between Chaotically folded sheet flow and lobates trending 230-250(?). The lobates then transition into pillows with glassy 5-10cm buds over 30%+ of thier surface.
1515 235 All within lobates that are less collapsed, more intact, than those seen closer to the ridge axis. Lobates are low, 10-30cm high, but broad, 1-2m wide. These have a light sediment cover (age 1) X:2561 Y:5645
1519 270 still within the same lobate flows
1520 002 within the same lobate flows unit X:2460 Y:5635
1524 END OF DIVE 3345, at the contact with collapsed lobates near the axis and the Chaotically folded sheet flow X:2434 Y:5803