stbd:
Cindy Van Dover
stbd:
Cindy Van Dover
0858:00 1066 m. Maggie twist, rudder only, CCW, 1 degree per sec
0914 End spins, began and end at 200 degrees 0915 Ahead, hdg 218 degrees [back to map] 0916:15 Astern, hdg 227 0916:45 Stop 0917:30 Up, hdg 215, depth 1438 m 0918:15 Down, hdg 199 0919 Done with Maggie set up 1006 Bottom in sight, hdg 221, depth 2675 m; untectonized lobate 1011 2684 m, lobate, with light sediment, some sessile animals (sparse); Lobes ~ 1-2 m across, variable, glassy beneath sediment; < mm's sediment; no collapses 1013 Lobes now are budded; no striations; buds are 10-20 cm 1014 Lobes smaller, with buds; still at landing site 1021 SAMPLE 1. Sampling lobate; 35 mm camera on 30 s auto; lobes are rugose, grading toward pillows; solitary vertical push-up of lava, ~30 cm high among lobes [back to map] 1025 Still sampling; buds are very friable 1029 2689 m; sample of glass bud (digital image # 29) into port forward bin 1A; oval, tubular, soft-ball size 1034 Pan and tilt video of sample 1036 Hdg 222 for Waypoint 2; pillows among lobates, occasional sessile animals (gorgonian coral, anemone); from here through the rest of the log, sediment cover and glassy appearance of lavas will be uniform except for one brief period, which will be noted below; solitary tubular pillow then a field of heavily budded pillows, upslope; then back to budded lobates and flat-capped lobates 1038 Heavily budded pillows with some lobates; 1/2-1 m relief; moving up slope 1039 Turning to move directly upslope; heading 243; lobate, smoother and with lower relief 1041 Morph to lobates 1041:50 Lobate with variable areas of buds, hdg 243 1042 Slightly higher relief to lobates. Still no collapse features but some crack of lobate caps; small piles of white material on tops of some lobes, as if there were weathering -- look like old shell fragments from a clam dropped by a seagull onto the road 1044 Much flatter lobate flow; alligator skin texture, 2 cm scale; collapse in front of us; hill and vale relief here 1044:54 Edge of collapse; floor = tiles of sheet flow (collapsed roof); 5 x 10 m; another collapse, ~20 m x 8 m 1045:22 Jumbled flow; no attached animals [back to map] 1045:55 Cross from jumbled to cracked lobate/sheet, to lobate; at border of jumble 1046:21 Up to flat lobate with local depression filled with jumbled flow; 2678m, hdg 243 1046:50 Solitary budded pillow Budded pillows; waterfall area with jumbled lavas passing between striated pillows 1047:29 2677 m, hdg 241 over lobates with alligator skin and crack-tops 1048:09 Budded pillows wth alligator skin 1049 Budded lobate, first high relief then to solitary tubular pillows 1049:50 Lobate; amphipods and more turbid water 1050:29 Lobate, low relief (~0.5-1 m), broad, tubular in some places; few buds 1051:49 Stopping to enter coordinates for Animal Farm 1052:27 Small collapse 4 m x 1.5-2 m 1053 Paused on alligator skin lobate 1055:45 Ready to head for AF, range 200 m, 327 degrees; lobate, with shallow, small collapse; sheet and small whirlpool then morph back to lobate, few buds, some alligator skin 1059 Lobate 1059:35 Small collapse, edge of a larger pond. Short pillars then a deeper pond with talus at the slope edge 1100 Out of collapse onto lineated sheet flats; animals sparse 1101 Hdg 315; spaghetti ahead; jumbled flow ridge into sheet valley with cracks perpendicular to axis of flow[back to map] 1102 Fissure; our hdg 327, 2675 m; dense anemones (two types: one flush against rock, other more tall); odd "Homer" ?tunicates (tan-brown with venus fly-trap shape; variously opened wide and closed, with a curious pointy "cap" that opens; bythograeid megalopa; also a shrouded seastar; (neither the ?tunicate nor the seastar is vent-specific); gastropod, spaghetti worms, dead valves of clams; sediments rusty-colored plus numerous egg capsule of Phymorhynchus (white, dime-sized disks); Phymorhynchus is common; stauromedusae; sediment cover decreased; serpulids, dandelions (not the same as at 9N). Numerous small polychaetes in the water column (~1 per liter) 1110 Sheet channel in distance with jumbled flow near; serpulids on jumble 1111 2673 m; serpulids but no tentacles exposed (i.e., probably dead); barnacles on rocks; mussels; hemichordate; no shimmering water out my viewport; Blee sees some shimmering, but not much; anemones; leaving jumbled flow onto lobate 1112 Shrouded seastar; approaching mussel bed, on 3-chip [look at temperature plot] 1114 Sample 2. Mussel pot deployment: 2675 m; x = 3525 m, y = 8433 m; swarms of polychaetes in water (~1 cm length); shrimp in water column (not Chorocaris); sample site: mix of dead clam shells, dead mussel valves and live mussels (turns out to be ~50% live mussels based on our collection); clam shells are "full-grown", 20+ cm; 1126 Finished Sample 2 (mussel pot); technically works well, but mussels are not piled up here enough to get a great sample; see digital images 27, 28 for in situ pot photos 1127 Hemichordate purple worm on 3-chip video 1128 Sample 3. Sampling a rock from Animal Farm with barnacles and serpulids; = Sample 3, taken from the same area as the mussel sample (little shift in sub position to grab this rock); x = 3523, y = 8433 m, 2675 m, hdg 277 1130 Sampling complete, into forward aft bin on digital camera 26 [back to map] 1132 Stbd camera 35 mm -- shots of sample area and divot where mussel pot was used 1132 Documenting sample on video; note: barnacles extend their cirri but do not draw them in rhythmically the way shallow-water barnacles do; serpulids in this area are all dead; no live clams observed; live mussels are not open enough to display mantle margins the way they would if this were a healthy site; looks very much like the last legs of an old vent site [look at temperature plot] 1136 Divot left by mussel pot: looks like the pot cleared the mussels to the depth it was inserted, left behind are a few broken valves and several live mussels, but this is expected since the pot is not designed to scrape the seafloor clean 1140 Leaving this patch of Animal Farm -- patch size 4 x 4 m; other mussels within 10-20 m in fissure; folded sheet flow 1141 Hdg 217; smooth to folded sheet with slope up beyond; fissure with mussels; many dead mussels; anemones dominant; shrouded seastars, hemichordates, Phymorhynchus, barnacles 1142 Sharp transition between animals/no animals; ?geological explanation? 1143 Jumbled lava to sheet; small collapes in lobate off in distance 1143:45 Broad, smooth lobate with local collapses 1-2 m dimension 1144:06 Local collapses (restricted to lobes); morph to jumbled ridge perpendicular to our heading of 200; ridge defines lava channel of lineated sheet with ridge on far side (2-3 m horizontal scale of ridge/channel/ridge (i.e.9 m total)); folded flows transition to smooth lobates with very small collapse windows (<0.5 m) and then to jumbled flow 1145 Jumbled flow, irregular relief; abundant comatulids in water column 1146 In a local depression; jumbled flow, hdg 200; another local depression with local pond of sheet flow (10 m max dimension); beyond is ridge-valley terrain; into lobate with very small local collapses restricted to individual lobes; to ropey flow to ponded sheet flow with lineations; evolves to ridge of ropey lava 1149 Lobate, 500 m from waypoint 2; 2670 m; lineated sheet flow (10 cm relief) to jumble and irregular topography (small scale (10 m) ridge/valley)); into jumbled levee onto sheet channel with ripples on either side to another jumbled levee, then down into sheet flow again; sparse cracks over surface of pond; channel with folds, then more sheet, then levee with more relief than last batch (1/4-1/3 m here) [back to map] 1150:22 Onto sheet pavement 1151 Lineated-folded flow, approaching levee of jumbled flow, then into depression; lots of comatulids; folded flow; to lobates at higher elevation with small local collapses in lobes; lobes ~2 m dimension; to sheet flow and collapsed channel then to folded sheets then into smooth, low-relief lobates 1153 Sheet flow onto lobate; local collapses 1154 Sheet flow, lineated in the middle, smooth edges, broad flow 1154 In lobates, with small depressions field with jumbled flow 1155 Lobates (no buds, no collapse) 1156 Still hdg 202, in lobates, with solitary striated bulbous pillows 1157 Polychaetes in water column, spaghetti; budded lobates, solitary pillows; local collapse 1158 Large aggregations of spaghetti on local topographic highs; lobate flows 1159 Budded lobates, with solitary pillows; small collapse, 0.5 m relief; ridge with jumbled flow down to broad folded sheet flow 1200 Out of sheet flow, into jumbled flow; tortuous terrain [back to map] 1201 Over ridge of jumbled flow and talus, down into lineated sheet flow, then smooth, then lineated again in the middle (e.g., ~3 m smooth, 2 m ripple, 3 m smooth in long bands); then onto another jumbled ridge and flow, tortuous 1202 Collapse area with 1.5 m high pillar with lobate flow on margins; floor is mixture of sheet and talus; then to jumbled flow 1203 Preparing to head S to waypoint 3; over large collapse with rim of lobate; floor of collapse is sheet and other things; then onto jumbled flow 1205 Sample 4. Folded sheets, lobate with collapse cavern (4 m max dimension); sample from collapse pit area; hdg 268, Depth 2671; frames 24,25 on digital camera 1211 Digital video of sample; into center forward port = Bin 5A 1215 Hdg to waypoint 3 [back to map] 1217 Small collapse feature (10 m max dimension, 1 m deep, with pillar); lobate flow; to collapse pit, pillars; 3-4 m at deepest part; networked collapses; spaghetti, comatulids 1218 Lobate flow, no buds, no collapses, no tectonics 1220 Hydrothermal area; Phymorhynchus, bythograeid crabs, shimmering water; not very robust; thicker sediment- orange hydrothermal; fish, dead Tevnia (i.e., no plumes exposed); large flakes of sooty black stuff coming out of a vent (thin like seaweed and about10 cm max dimension); serpulids; relict old sulfide, <1 m tall 1222 Live serpulids with plumes expanded; can see places where there clearly had been some low-T fluids coming out; broken fluids; we've been doing a meander here around the vents 1225 Back on course 180 degree, periphery of hydrothermal area; dozens of fish at a hole, nose down in diffuse flow; dandelions 1226 Polychaetes in water column, dead serpulids; lobate flow without hydrothermal sediment [look at temperature plot] 1227 Collapse area to lobate flow; residual h-v animals (bythograeids, galatheids) 1228:24 Lobates with buds and solitary pillows; with small local collapses, shallow (10's of cm not m) 1229 Pocket of jumbled flow amid lobate [back to map] 1231 Continuing in lobates with solitary pillows 1232 Along edge of a collapse pit 1233 Broad lobates with local collapses 1233:32 Collapse area off to starboard -- bathtub rings and arches (10-15 m max dimension) 1235 Continuing over lobate with only small collapses (1.5 m max dia); lobates broad, several m across in long dimension; over small patches (<m diameter) serpulids; then to collapse area 15 m length, 1 m deep, floor of broken plates 1236:18 Hdg 182; still over series of collapse features with bathtub rings; interconnected; lobates then more collapses; then along large collapse area with floor of ropey sheet and thne jumbled flow filling most of the bottom that is in view 1238 Ropey folded flow then onto sheet flow; setting up to sample folded flow, with alligator skin texture to some of teh glass 1239:11 In bottom of collapse still with folded sheet; took a couple of 35 mm photos. 1245 Sample 5. Piece of folded lava, on pan and tilt; frame 23 on digital camera, hdg 171 into bin 5B 1249 Back on the road, hdg 180, climbing out of collapse pit 1250:45 Into local patch of jumbled flow surrounded by lobate with local shallow collapses; elongate lobes in distance (>10 m); in lobate flow, with white staining in cracks 1252 Hdg 180 1253 Lobate flow, status quo 1254 Solitary pillows among lobate field; single "rafted" piece of sheet; solitary pillow with rafted blocks of sheet up against it 1255 Lobates then down ridge of lobate/jumble into lineated sheet flow, along margin; then onto sheet then grade to lobate and a collapse pit 20 m max dimension with talus plates on the floor 1257 Small collapse, shallow (< 1 m) with talus plates on floor; note: sediment now heaviest of dive though glass still obvious 1259 Lobate flow with white staining and local collapse; solitary pillow among lobates 1301 Transition from small stretch of sheet to lobate; lobates getting more bulbous, grading into pillow shapes but without striations [back to map] 1302 Lobates with occasional solitary pillow, still with heavier sediment 1302 Tubular pillows with gorgeous buds 1303 Lobates; same heavier sediment cover 1306 Flattened lobates with local collapse pit ~ 7 m max dimension; same heavier sediment cover 1308 Lobate flows 1309 Lobates become more bulbous; grading into pillow terrain; then quickly back to lobates 1310 Preparing to sample, hdg 253, 2676m 1316 Sample 6. On pan and tilt; bud of a pillow 1319 Leaving site, 2674 m, hdg 232; lobates 1321 Lobate; sediment still seems heavier; down 1 m into sheet flow on floor of small collapse 1323 Lobate with local collapses, 4-5 m max dimension 1324 Local depression filled with jumbled flow surrounded by lobates 1325 Folded flow with some collapse; folded part down in collapse; roof and surrounding area is lobate 1326 Hdg 233; shallow (<1 m) collapse features in lobate; less sediment 1327 Hdg 233; local collapses in lobate; then to big collapse pit; talus; deep, follwing margin 1329 Collapse feature is 12 m deep (see mesotech) 1330 Hdg 234; bottom back in sight; ropey flow giving way to lobate; scattered bouquets of tubeworms (dead?) in pit [back to map] 1331 Spaghetti on broken up jumbled flow; at wall and climbing out of pit; floored with broken sheet flow with steep slope 1332 Still climbing up wall, now over talus pile 1332 Lava pillar at margin; roof of lobate flow with spaghetti 1333 Continuing in collapse, little sediment; small clumps of tubeworms; spaghetti; in collapse area with different flows visible 1334 Hdg 234; over jumbled flow 1335 Sheet flow; lineated with waterfall and broken slabs at a downslope region 1336 Moving from sheet to jumbled levee and then to lobates with light sediment and local collapses 10-15 m max dimension 1336 At edge of a large collapse; from lobate to jumbled and then into pit; jumbled ropey flow in bottom and some plates 1338 Into pit to sample basalt; ropey/sheet flow then onto smooth sheet 1347 Sample 7. Chunk of fold into bio box; hdg 122; 2677 m; x = 2925, y = 6111 digital pic #22; on pan and tilt [back to map] 1349 Range 300 m to next waypoint 1351 Sheet with cracks; shingled surface (cm scale), climbing up 1352 Waterfall sheet then to level sheet flow; to lineated sheet flow with microscale (1 cm wide, several m long) crack; edge of lineated flow merges into jumbled flow then to lobate 1353 Jumbled flow back into lineated sheet flow with a crack perpendicular to lineations; to densely lineated sheet (braided) merging to smooth sheet 1353 Lineated sheets; narrow bands to broader bands (1/3 m) than folded to jumbled 1354 Jumble gives way to lobate with local collapse 2-3 m max dimension 1355 Lobates into sheet flow down 1 m; some sheet lineations 1355 Smooth sheet transitions into rugose sheet (braided), then quickly to jumbled flow; moving upslope 1356 Ridge of jumbled flow to lineated sheet flow to braided sheet to jumbled to lobate 1357 Jumbled flow, hdg 251 1358 Braided sheet then to smooth sheet 1359 Braided sheet flow with sharp transitions in both axes 1359:43 Jumbled flow to lobate to more jumbled to sheet with a crack; ridge with lapping margins of sheet 1400 Hdg to waypoint 5, hdg 165 [back to map] 1402 Jumbled into sheetflow depression to lobate flow to jumbled flow; very mixed terrain 1402 Major field of lobates with light dusting of sediment 1403 Sheet flow with lineations, crack; lobates on far side 1403 Small local collapse < 1 m deep, 2 m wide; ridge of jumbled flow to folded-braided sheet 1404 Braided flows to channels of flat to braided to flat 1405 Smooth sheet into braided flow 1406 Slope change, onto some jumbled flow 1407 Over a ridge, down into sheet with alternating channels of smooth, braided, then larger scale folded sheet chaotic topography 1407 Curved drapes; chaotic; climbing up to lobate amid jumbled flow 1408 Over low-relief ridge of jumbled flow to braided to flat sheet to braided then up out of that into lobates. Note these ridges associated with channels have ~ 1-2 m relief 1409 Braided sheet with alternating chanels of smooth sheet 1411 Ridge to flat sheet with cracks 1412 Small local collapse; jumbled flow 1412 Sheet flow into collapse and lobate flow 1413 Out of lobates, back to sheets 1414 Smooth sheet and braided sheet 1415 Sinuous crack in sheet, shallow (<0.5 m), narrow (30 cm wide); more cracks 1415 Folded sheets to jumbled, hdg 169 [back to map] 1417 Jumbled flow, drop off to stbd where there is more folded sheet; pillars on margin of collapse area, lobate flow on roof 1417 Over pit with jumbled flow, talus in bottom 1419 Ropey flow at bottom of collapse; then to margin END OF BOTH SIDES OF TAPE; no second tape available. [back to map]