Dive R501  
      Dive Plan: "Geobiodive" to finish mapping and sampling the contacts of the 1998 lava deploy the time lapse camera at Mkr-33 and biological suction samples at Mkr-33 and a bag site."  
      Note: Nav fixes not edited in the logs. All fixes were logged, regardless of accuracy. Use the dive plots to determine actual positions. No acoustic nav logged until ROPOS went down second time at JD192 0521. Have nav for rest of dive.  
  UTC Hour Min Depth (m) Sub Hdng (deg) UTM X UTM Y Comments Frmgrbs, Photos, Samples
21 37 0 17 423660 5086399 ROPOS in water.  
22 51 1522 143 423791 5087129 ROPOS on the bottom.  
22 53 1521 172 423810 5087146 At Mkr-33 looking for place to deploy the time lapse camera.  
23 2 1523 206 423844 5087107 Camera placed on seafloor. Will be moved into place.  
23 9 1521 238 423839 5087128 Photo of time lapse camera in position. Photo 1
23 10 1521 345 423839 5087128 TL camera looking from south R501-1
23 10 1521 350 423839 5087128 Side view of time lapse camera. R50-14
23 11 1520 348 423840 5087125 Frame grab looking from the south, marker 3 in background R501-5
23 11 1522 331 423840 5087121 Side view of camera. R501-6
23 12 1522 78 423840 5087121 looking at TL camera from west to east R501-7
23 12 1522 69 423837 5087118 Head-on view of camera. R501-8
23 13 1519 251 423841 5087131 Looking at TL camera from NE to SW R501-9
23 13 1519 247 423841 5087131 Back view of camera. Photo 2
23 14 1521 243 423844 5087124 TL camera looking SW R501 10
23 14 1521 244 423844 5087124 Backside view of camera. Photo 3 -4
23 15 1522 266 423844 5087124 Back quarter view of camera. Photo 5
23 15 1522 321 423844 5087124 TL camera looking to NW (Camera is looking West) R501-11
23 16 1523 328 423837 5087128 Side view of camera. Photo 7 - 9
23 18 1520 247 423844 5087123 TL camera - ROPOS is looking to SW R501-12
23 19 1520 237 423844 5087123 TL camera - ROPOS looking to SW R501-13
23 20 1521 245 423844 5087127 Another one R501-14
23 27 1522 293 423841 5087131 side view of time lapse camera in position at Mkr-33 R501-15
23 28 1523 295 423841 5087131 close-up of time lapse camera in position R501-16
23 36 1524 358 423836 5087138 Picked up suction sampler with 5 function.  
23 39 1523 348 423844 5087107 Suction sample in jar 1 of bacterial mats at Mkr-33. SS-j1_mat

_R501-1
23 47 1521 338 423846 5087110 Looking at site to possibly reposition camera  
23 51 1518 199 423984 5086851 Decided to move camera back ~15 cm.  
23 56 1523 236 423846 5087105 ROPOS positioning Time Lapse Camera R501-17
23 56 1523 232 423846 5087105 Camera moved 15-20 cm back from its original position.  
23 57 1522 233 423753 5087352 Area to south of camera R501-18
23 58 1522 242 423845 5087111 Area being viewed by Time Lapse Camera R501-19
23 58 1522 249 423845 5087111 Backside view of new camera position. Photo 10 - 11
23 59 1522 328 423845 5087108 What camera is looking at R50120
23 59 1522 330 423845 5087108 Side view of timer lapse camera. Photo 12
0 0 1521 291 423844 5087107 Mkr-33 vent. Photo 13
0 1 1523 264 423844 5087115 What NeMO camera would look at R501-21
0 3 1522 215 423847 5087114 Video survey along crack on heading 215.  
0 4 1521 211 423845 5087118 What NeMO Camera would look at R501-22
0 4 1520 216 423845 5087118 End if video survey.  
0 8 1498 270 423845 5087118 Traveling 165m on course 213 to south of Mkr-33 to begin geological traverses over new lava. Target name is Geotran"."  
1 20 1502 221 422463 5085383 Have arrived at beginning of geotransect, 560m SW of Mkr-113.  
1 22 1520 59 422893 5085729 Descending to seafloor, going to West of contact and going to drive East across it. stay tuned.  
1 23 1527 98 422893 5085729 At bottom. Se sediment in pockets around lavas - Bob says old stuff.  
1 24 1532 91 422907 5085745 Smaller lobate flows look quite black. Lots of sediment. Older flow-old or intermediate? Photo-14
1 27 1531 87 422891 5085740 Large pillows up at the slope. Moving the ship along this transect due East to look for contacts.  
1 29 1528 93 422911 5085734 Starfish in photo. Photo 15 - 16
1 30 1529 92 422917 5085741 Holothurian, ophiuroids on lava.  
1 31 1528 87 422911 5085746 good fix. Rattail.  
1 32 1531 85 422917 5085734 good fixes. Older than intermediate says Bill. Quite a bit of sediment, says Bob. Crab.  
1 33 1534 89 422930 5085720 Some sponges, lots of ophiuroids, brown sediment, anemone. Trying to get close-ups of surface to see how old the lavas are.  
1 34 1534 98 422949 5085688 Lots of holothurians.  
1 35 1535 94 422956 5085680 Definite brownish tint on the surface of the larger pillow lavas, although it looks really glassy. Surprising! "Key is to look closely at the lava" - Bob.  
1 36 1534 94 422966 5085689 good fix.  
1 37 1534 94 422974 5085695 Lavas look glassy from a distance, but when zoom in, they do look quite old. Large anemone. Photo-17
1 38 1534 98 422980 5085699 Another anemone. Holothurians. Lots of ophiuroids. Photo-18
1 39 1534 93 423001 5085708 Empty tubeworm tube. Ophiuroids. Grayer members of the same lava flow. Rattail. Large pillow lavas. Photo-19
1 41 1532 99 423011 5085715 Mike Perfit likes the look of the rocks too. Its a geo love fest! Still on old lavas.  
1 42 1531 100 423029 5085716 Anemone, Bob thinks this is the same flow, although there is some discussion that this might be a contact. Anemone again. Bob thinks this is the same flow still. Starfish.  
1 43 1532 116 423033 5085700 As get in close, can see more sediment, little sponges, holos, ophiuroids and they don't look as young as they do from far away.  
1 44 1532 114 423047 5085696 good fix. Tube-like animal sticking out from under lavas. Lots of ophiuroids and holos. Little sponges.  
1 47 1531 112 423083 5085701 Come up about 6 or 7 meters since we've been driving. good fixes. Lava looks glassy, but still older flow.  
1 49 1531 109 423102 5085703 Continuing East, lavas are becoming more lobate-now back into more pillows, but not seeing the larger ones anymore. Photo-20
1 49 1530 113 423112 5085704 good fixes here. Holos, sediment pockets.  
1 50 1529 113 423122 5085704 Aren't as many sponges and ophiuroids, at contact.  
1 51 1529 115 423128 5085707 good fix. P-code is going down. At contact. Stopping the ship. Zooming in. Photo 21 - 22
1 52 1530 116 423143 5085705 Contact-the younger lava of the two. R501-23
1 53 1530 114 423142 5085705 Does look like younger lava, but there are some ophiuroids, a couple of holothurians and some sediment. Ship is stopped.  
1 54 1530 106 422720 5085324 Looks like a very similar type of flow as we've been traversing, but don't have as much sessile fauna on them.  
1 55 1530 86 422721 5085323 We're going to take a piece of rock. Taking the younger rock of the contact.  
1 59 1530 46 423141 5085704 Very glassy rock under surface-can't get a grab. Going to take a suction sample instead.  
2 9 1530 63 423142 5085704 Having trouble with the suction sampling-its stuck.  
2 15 1530 61 423142 5085708 Suction sampler jammed and two lights are out.  
2 22 1530 65 423143 5085709 Sub coming back up. Light on camera is out. Quick turnaround and then back down again.  
3 8 204 7 422440 5086972 Notice: We will not change the dive number, even though ROPOS will come to the surface for repairs. I've been informed that the dive number only changes when we do pre-dives and post-dive procedures  
3 10 146 23 422440 5086972 ROPOS is back on deck to fix the suction sampler and replace the lights.  
3 54 2 145 422440 5086972 ROPOS back in the water. Going down to Contact W10 to continue dive.  
3 54 2 145 422440 5086972 CORRECTION: ROPOS BACK IN THE WATER AT 0413.  
5 1 1253 250 423058 5085723 Continuation of Dive R501. Fixed the connector to the camera light and pulled a large piece of whole rock out of the suction sampler carousel that was jamming the rotating mechanism. Have acoustic nav from this point till end of dive.  
5 21 1531 274 423103 5085725 On the bottom. Looks like older with many sessile organisms. Many brittle stars. wandering around a bit to find a broken piece to sample. Could be 50 m west of contact with Age 2 pillows.  
5 25 1533 16 423048 5085709 prospective samples R501-26
5 26 1534 22 423074 5085738 3050 5709 was a good fix  
5 25 1533 17 423048 5085709 good fix. Trying to get a sample on large pillow. 3050 5709. Surface looks older. Photo 23
5 28 1533 30 423048 5085711 really glassy R501-27
5 29 1533 31 423047 5085709 Taking pillow sample. sample 2 R501-29
5 31 1533 18 423047 5085714 Can't pick up glassy top of pillow so going to slurp glass into Jar J3. SS-j3_rck

_R501-2
5 38 1533 348 423047 5085709 resorting to suction sampler R501-30
5 42 1533 348 423045 5085709 Finished taking sample 2 of old (age 3?) top of pillow lava.  
5 44 1533 84 422351 5087104 Many dense small stalked organisms on lava surfaces Photo 23
5 47 1533 70 421936 5085735 surface of intermediate flow R501-31
5 47 1533 70 421936 5085735 Fairly extensive sponges and sediment pockets. Holothurians, lavas getting more lobate in form.  
5 48 1532 101 423065 5085727 Heading east. Anemone in older lavas. Photo 26
5 49 1532 62 423360 5085449 Crab and fish. still in old lavas  
5 52 1531 114 423112 5085734 contact between new lava and old(er) R501-33
5 51 1531 108 423112 5085734 Big sponges and now at contact with large well formed pillows, Well formed pillows and large tubes. Quite glassy with few sessile organisms. A little less sed. Photos 28-29
5 56 1530 122 422711 5085334 Close up of surface of larger pillow. Photo 30
6 0 1531 91 423127 5085716 Trying to grab a sample of small tube, toe in lobates but not having much luck. Going for the suck.  
6 2 1531 99 423185 5085742 Going to sample in Jar #7. SS-j7_rck

_R501-3
6 6 1531 106 422626 5085255 Finished sampling slurp 7. Younger of two flows at contact. Age 2 flows.  
6 10 1528 92 423136 5085713 Heading east again. Glassy nature of lobes, not much life a few holothurians, not to many brittle stars. they appear to be smaller in size. Not much sed in pockets either Photo 32 - 33
6 11 1529 86 423258 5085964 Inter-pillow sediments R501-34
6 12 1530 122 423149 5085720 Of surface of the large younger pillow. Photo 35
6 15 1530 194 423152 5085709 Continuing east. Small amounts of Fe sed between lobes and pillows. Quite a few holothurians. Still some large pillows. Area has been flat over a long distance. Some very glassy tubes coming from the pillow bottoms. Photo 36
6 19 1532 124 423157 5085652 Contact with jumbled flow that has alot of sponges, possible kipuka.  
6 20 1531 69 423178 5085656 Going over a collapse zone with bathtub rings on walls. to the east. along the collapse are lobates that could be the younger lobates Ph-39
6 25 1532 336 423200 5085668 Archway with new lavas a top older flow R501-35
6 25 1532 9 423200 5085668 Younger truncated lavas overlying the collapse structure. Pictures 40-43
6 26 1532 6 423202 5085670 contact of younger on older collapse R501-36
6 26 1532 6 423202 5085670 Surface contact R501-37
6 26 1532 354 423200 5085669 another R501-38
6 27 1531 336 423200 5085670 drip R501-41
6 27 1530 257 423308 5085147 Drip structure into the collapse. Photo 45
6 28 1529 265 422062 5085241  
 6 33 1531 98 423270 5085708 Taking a sample near the collapse in some broken up lobes. It is unclear if this is underlying older or the same age as the last sample (3). We don't appear to be in the collapse pit now but it is very broken up. Rck_R501-4
6 35 1532 112 423237 5085669 sample #4, lava chunk R501-42
6 35 1532 114 423237 5085669 Sample 4 R501-43
6 36 1532 114 423237 5085668 Putting the sample 4 on the proceed BioBox. Far back left division. Blocky sample with good layer of glass and a layer below it.  
6 39 1529 258 423236 5085668 After sampling we are heading east again. Collapse area again to the NE. Driving east in younger lavas. A bit more sediment but not much sessile life on lobates Photo 46.
6 41 1531 102 422721 5085172 More broken up pillows, appears to be same unit that sample 3 and 4 were in. Looks like an older flow kipuka now.  
6 42 1531 96 423259 5085677 Back into age 2 lavas. Flow must be fairly thin. Mixture of pillows and small glassy tubes and lobes. Some flatter lobes to.  
6 45 1529 100 423326 5085682 Waiting for the ship. Appears to be more sed. between lobes - possibly some hydrothermal sed.  
6 48 1530 106 423335 5085678 Small scale venting activity due to telltale staining on lava flow R501-44
6 48 1531 103 423335 5085678 Some hydrothermal (FE) staining on lower portions of lobes.  
6 51 1530 102 423345 5085673 Same flow but glass on surface looks more broken up, more glass in sediment pockets. More yellowish hydrothermal sed between pillows. We are on the joystick line. Photo 48-51
6 55 1529 97 423366 5085682 Venting must be going on. lots of Fe between lobes. Same line as Joystick. Photo 52
6 58 1530 101 423395 5085682 Getting out of hydrothermal area. Surface is like age 2 again but there are some older sponge covered pillows sticking up.  
6 59 1530 102 423411 5085681 Stopping to get sample of age 2? or is it '98 flow? Hard to tell Rck_R501-5
7 3 1530 118 423241 5086138 sample #5, port front geobox R501-45
7 2 1530 117 423411 5085680 Sample from a crust of a hollowed out lobe. Sort of stubby with thin glass, angular edges x=3411 y=5680 position. Went into the front port BioBox.  
7 4 1530 93 423238 5086148  
 7 4 1530 93 423238 5086148 Location of sample 5 R501-46
7 6 1530 91 423232 5086164 Heading east after sampling.  
7 7 1529 93 423234 5086163 Still looks like age 2 lavas. No colonization, but light dusting of sed. Not much sed in pockets. Mostly small lobes, not many pillows.  
7 12 1527 91 423432 5085680 This is a good fix. Hanging out waiting for ship to move east.  
7 15 1529 95 423433 5085678 Believe we are still in age 2 lavas with no sessile organisms and light sed cover. Uniformly flat lobates with some shallow collapse, some hydrothermal staining.  
7 17 1528 97 422914 5085159 Some bio. Bacterial Mat on cracks in lobates. More iron staining and sed in cracks. but rapidly getting out of zone of microbial mats. Some yellow staining or sed on lobes.  
7 19 1528 96 423474 5085687 Deep collapse area with plume emanating from the edge.  
7 20 1529 344 423474 5085687 area of collapse with slight venting under it. R501-47
7 20 1528 341 423475 5085683 Edge of collapse .bacterial mat R50148
7 20 1528 90 422929 5085152 On edge of collapse. can se sheet flows on base of collapse. Lineated sheets trending SW.  
7 23 1530 86 422980 5085846 Stopping to get sample from eastern edge of collapse in lineated sheet flows. Moderate sed. cover. Sample 6. Photo 56
7 26 1530 88 423491 5085695 Suction sample of glass from sheet flow R501-49
7 23 1530 85 423493 5085695 good fix. Taking a suction sample in jar #8. Sheets in bottom of collapse looks age 2.  
7 27 1530 89 423493 5085694 Sucking lots of sheet flow glass SS-j8_rck

_R501-6
7 31 1530 82 423492 5085695 good fix  
7 32 1530 83 423492 5085695 Niskin sample  
7 34 1529 80 423491 5085695 aborted niskin  
7 36 1528 92 423503 5085699 collapse area, pillars  
7 39 1528 95 423524 5085680 lobate flows, seds more evenly distributed due to larger flat areas  
7 40 1528 93 423534 5085680 lobate flows photo 57
7 42 1528 96 423550 5085680 collapse area, pillars  
7 43 1529 86 423557 5085679 SE-NW trending collapse area, sheet flows in bottom  
7 45 1531 93 423579 5085680 good fix, sheet flows, jumbled lava at edge of collapse  
7 47 1529 99 423591 5085680 In collapse area, jumbled lava in bottom, broken lava toes/tubes, still interim age lava  
7 49 1529 96 423614 5085683 small sponges on jumbled lava surface  
7 51 1529 94 423628 5085684 good fix  
7 54 1529 100 423655 5085682 back out to small section of roof, then back into ropy floor of shallow collapse  
7 57 1530 92 423687 5085680 good fix, collapse area, jumbled lavas  
8 4 1530 93 423752 5085670 Continuing in very jumbled and chaotic sheets, a bit of hydrothermal sed. in pockets. Should be nearing the new flow contact. Could be a edge of collapse zone.  
8 5 1529 93 423774 5085668 Jumbled up flow with hydrothermal sediment. Now we're back into the regular jumbled folded up crust. Photo-58
8 7 1529 98 423797 5085666 Still in the collapsed area filed with jumbled lava.  
8 10 1529 97 423830 5085666 Murky water in the sit camera.  
8 11 1529 92 423834 5085666 Some ropy lavas mixed in with the jumble.  
8 11 1530 91 423839 5085667 Looks like a bit of a drop of here- the sheet is tilted down.  
8 12 1530 96 423842 5085667 More flat sheet surface.  
8 12 1530 92 423846 5085668 More lineated lava. 3847 5668  
8 14 1529 91 423862 5085667 We're stopping the ship to take a sample.  
8 14 1530 88 423862 5085667 Slabs of lava where we're going to sample. Photo-59
8 15 1531 100 423864 5085667 Slab of rock Rck_R501-7
8 15 1531 101 423869 5085666 We're at the edge of a shallow collapse-a jumbled broken up area- trying to get the sample.  
8 16 1530 100 422776 5084539 3865 5668 good fix for this sample. Photo-60
8 17 1531 100 423865 5085668 Chunk of rock from collapse R501-50
8 17 1531 99 423865 5085668 Placed sample in starboard BioBox. Slaby piece of sheet flow with glass on the top- longer than it is wide or thick.  
8 19 1528 88 423864 5085667 Continuing east. Lobates on top of jumbled sheet flow. Light sediment cover. No sessile fauna living here.  
8 21 1530 88 423877 5085670 Lineated, folded, a few curtains.  
8 21 1529 96 424086 5086092 Lots of collapse around pillars, a few lobates stuck out on top of it.  
8 23 1529 102 423904 5085672 Out of the collapse area, into some continuous roofs and lobates.  
8 24 1528 94 423910 5085668 Large deep skylight.  
8 25 1529 91 423917 5085667 Extensive field of lobates. Looks very solid.  
8 26 1529 94 423928 5085664 Shallow collapse with lobates.  
8 28 1529 94 423937 5085660 Ropy textures on the surface, drop down where big pieces have fallen down the little pieces. More sediment down in the collapse.  
8 29 1529 84 423749 5085626 Big pillars, slabs.  
8 30 1529 96 424329 5086033 More lobates. Strobe didn't work on picture. Photo-61
8 31 1529 96 425196 5085578 Deep collapse area with lobates on the top Photo-62
8 32 1529 94 423968 5085661 Fair amount of sediment on top of collapsed and jumbled pieces on the bottom.  
8 33 1529 97 423964 5085658 Looks like we've found some contact. Black stuff over lightly sedimented lobes.  
8 33 1529 98 423973 5085662 Contact new lava. lightly sedimented lobes R501-51
8 34 1529 92 423995 5085660 Stopping the ship to take a sample. Last 5 strobes on the camera didn't work. Photo 63 - 65
8 35 1529 104 423993 5085661 Dark, reflective, hydrothermal sediment on these new "lavas."  
8 36 1529 136 424323 5086076 Some brittle stars on this new "flow."  
8 37 1529 128 424323 5086076 We're going to look around a little bit more before sampling to make sure this really is contact - Bill is not convinced.  
8 39 1529 94 423992 5085652 Having difficulty figuring out what this really is. Sediments in cracks of lobates, few organisms.  
8 41 1529 90 424054 5085932 Going to drive 50 m to the west then driving back this direction to se if we can find the supposed contact.  
8 41 1529 352 423998 5085660 White staining on some exploded lobe.  
8 42 1528 274 423995 5085662 Back into collapsed areas again.  
8 43 1529 278 423995 5085662 Turning back east again, heading a little bit north so we don't go over the exact same stuff.  
8 44 1529 88 424147 5086082 Light dusting of sediment.  
8 45 1528 93 423995 5085667 Not really striking new flow. A little bit glassier. Heading east, a collapse with lots of sediment on the fallen blocks.  
8 45 1529 84 424000 5085670 The batteries are dead in the camera again.  
8 46 1529 83 423214 5084939 Computer lock up.  
8 47 1529 83 424014 5085670 We're coming up of the bottom to try to reboot.  
8 51 1484 252 423995 5085654 Going back down now.  
8 53 1461 316 423998 5085653 We're going back up to the cage now, not the bottom.  
8 54 1451 336 423069 5085182 Going back down to 150.  
9 2 1504 59 423024 5084699 Doing some tether management.  
9 3 1527 140 423024 5084699 Going back to the bottom again.  
9 4 1528 103 423024 5084699 Well formed lobates, sediments in the pockets.  
9 4 1529 99 423974 5085644 3974 5645 Pretty glassy, with sediment. Skylight.  
9 4 1529 102 423978 5085644 Heading east.  
9 6 1529 104 425206 5085559 Glassy surfaces, light sediment cover, accumulated sediment between the lobes. Some brittle stars.  
9 10 1529 95 423528 5085914 Some brittle stars on these lobates. Continuing the line east.  
9 18 1530 101 425194 5085574 More sediment right in here, still looking for the contact.  
9 22 1529 104 422892 5084422 Ropy lineated flow with a lot of sediments at the bottom of this collapse.  
9 23 1528 101 424098 5085653 Back onto the lobate surface - similar looking surfaces.  
9 25 1529 101 422871 5084368 Old flow sticking out - near the contact.  
9 25 1530 100 424033 5085651 Pockets of old lava sticking through the new. Jumbled lavas.  
9 27 1531 112 424123 5085645 4120 5647 good fix of where the contact is.  
9 28 1531 113 422879 5084349 Area near contact where there are a few patches of jumbled older flow sticking through.  
9 30 1531 105 424146 5085644 Contact R501-53
9 30 1531 105 424146 5085644 Contact is found. Stopping to sample.  
9 31 1532 101 423726 5084996 Grabbing an old jumbled piece of lava. 4178 5646 Rck_R501-8
9 44 1533 157 424183 5085645 Still trying to sample this rock.  
9 39 1533 146 424114 5085646 Will try to grab a chunk of this old flow lava R501-54
9 50 1533 162 424967 5085437 Placing the rock sample in the starboard BioBox.  
9 53 1533 152 423168 5085064 Moving to get a piece of the new flow from the contact.  
9 54 1533 153 423168 5085064 Contact new lava. will try to get a sample R501-55
10 2 1533 267 424178 5085632 Sampling the new flow  
10 3 1533 263 424123 5085633 Trying to get a sample of new flow R501-56
10 5 1533 248 424196 5085631 Instead of a grab, we're going to try to slurp this rock sample. SS-4_rck_R501-9
10 7 1533 233 424111 5085630 x=4188 y=5637 Where we are suctioning.  
10 8 1533 252 425206 5085564 Suction sample of glass on newer lava R501-57
10 9 1533 255 424190 5085634 Jar 4 is filled with little pieces of basalt. Very successful suctioning.  
10 10 1533 255 424133 5085633 Now we're going to head north, 35, and follow the contact. Where we sampled we could se the little tube that fed this lava pillow. Neat-o.  
10 12 1533 254 423168 5085048 We're going 350, 40m.  
10 12 1533 316 423204 5084746 heading north, about 350 degrees, along the contact  
10 18 1530 358 424180 5085707 younger flow contact appears to have jogged to west  
10 21 1530 5 424136 5085723 following contact between jumbled older flow and darker new flow, to NW  
10 23 1529 352 424126 5085730 4126 5730 good fix.  
10 25 1528 353 424124 5085751 Jumbled sheets, lots of sediments in the pockets, lobates.  
10 27 1528 348 424116 5085778 Not seeing tubes or jumbled flow. A bit flatter now.  
10 29 1528 353 424118 5085791 Furry stuff growing on the lavas. This is older.  
10 29 1528 351 424115 5085794 Transitioned rapidly from the boundary into flat lobates and sheet flows with a lot of sediment pockets. Moving the ship so we can move west more now.  
10 31 1528 348 424111 5085823 Lots of brittle stars, furry stuff, sediment pockets, etc.  
10 32 1529 353 424113 5085836 Looks like new lava filing up an old collapse.  
10 33 1529 359 424114 5085842 New flow filling in a collapse R501-58
10 33 1529 351 424114 5085842 We've lost p-code. We're still going north, northwest. Looking at the new lavas.  
10 34 1529 355 424118 5085850 Still in the newer lava, little bits of sediment pockets. Surface of the glass is fairly clean, glassy tubes and fingers extending out.  
10 34 1528 353 424120 5085854 Can see contact.  
10 36 1528 357 424122 5085872 They think we have P-code back now. We're hanging out until we figure out if we can move the cage.  
10 39 1529 352 424125 5085882 We're in an older area with collapses, sheet flows, nice pillar with a hole down the middle.  
10 40 1528 322 424124 5085884 Massive lineated sheet flow with a lot of sediment. It is heading to the southwest.  
10 42 1530 338 424119 5085898 ROPOS is east of contact. Over sedimented ropy lavas.  
10 43 1530 342 424114 5085902 Push up structures. Large blocks. Higher to west. Sheet flow down below. End of tether.  
10 45 1530 334 424100 5085919 Extensive area of sheets. Except for sediment it doesn't seem that old. Jogging to the East.  
10 46 1529 331 423972 5086186 SE SE seems to be the lineation direction. Changed to broken up, folded sheets. Up a short wall. Very jumbled pile of sheets at the top.  
10 47 1528 330 424099 5085958 Jumbled sheets do not have much animal cover. Back into lobates with a lot of sediment in between. Looks old, more brittle stars and sediments.  
10 49 1527 329 424084 5085986 Low relief lobates, lots of sediment between the lobates. Rattail. Back into jumbled sheets. Back into lobates again.  
10 51 1525 330 424065 5085998 Jumbled flows with sessile animals at the tops. A little collapse, a few short pillars. Contact with new lava, lobates. Mixed area, old jumbled with new lobates. A few brittle stars. Sediment in the cracks of lobates.  
10 55 1527 334 425217 5086016 Back into the sheet flow. Lots of sediments. Lineations running the WNW. Trying to determine if seds are hydrothermal. No indication that they are.  
10 57 1527 337 425215 5086034 Back up to lobates. Pretty glassy.  
10 58 1526 335 424048 5086070 Contact. Ship will stop and turn to due west. Large fish rat tail. good contact. Turning west now 1100  
11 2 1526 280 424025 5086074 contact, blacker and glassier on left R501-61
11 1 1526 273 424040 5086080 Crossing southern most area that we saw last year. Big block, talus drain-out area. Jumbled area, lobates lapping up against older lobate drain out. Contact w/ blacker and glassier with older reddish lavas.  
11 6 1525 268 424010 5086074 Drain out. Moving again. Sediment almost covers the ropes. Piece of roof. Up onto the young lobate flows. Real glassy, very little on them. crab, flatter lobate, still glassy fronts to the lobes. Sheet flow, collapse.  
11 9 1524 272 423986 5086069 Slope coming from the right. Ropy and lineated sheet flows coming down the slope. Broken up sheets. Some collapse. Jumbled ridge. Some staining on jumbled rocks. Heading west. Collapse in the jumbled flow. Very chaotic.  
11 12 1524 269 423928 5086067 Huge, not sure what it is. Big blocks. Large ridges. About 3 meters of relief. Sediment on the top of a ridge. Big depression. We have gone down a couple of meters. Push up ridge with orange oxide deposits. Looks like a wick.  
11 16 1524 262 423889 5086065 In an area of deep depression. Some flock in the water.  
11 18 1525 268 424057 5086481 Jumbled lavas, with ridges. Looks like it's getting deeper. At the edge of deepest part of basin. Lineated flows at the bottom. Lineated flows trend S to SW. Some of the sediments here are hydrothermal. Pieces of white flock.  
11 21 1529 269 423844 5086057 Deepest was about 16.5 meters, now back up. Looks like mat coverage. Big plates, turned up on their side. Pahoehoe lava. Stop the ship. Plan to take a sample.  
11 25 1529 276 423829 5086069 Attempting to take a sample in the mat covered, ropy sheets. Grabbing with claw.  
11 26 1529 277 423831 5086069 rock sample into forward strb. Rck_R501-10
11 28 1529 275 423830 5086069 Second pieces, (rock broke into two). Both in stbrd front. Check gauges.  
11 33 1529 276 423812 5086071 new or interim flow, mat on surface R501-62
11 31 1529 276 423215 5085317 Panning camera. Mat on the surface. Looks like deflated bag creatures.  
11 34 1529 277 423214 5085313 closer view of mat on rocks R501-63
11 34 1529 276 423833 5086069 Will attempt to take a SS j4 of mat. Kim's highlight tape. Flushing the hose into bottle 4. Positioning to J4. Start sample pump 11:40, material is not being sampled yet. Need to get closer to surface. Now getting material. Pump off 11:50 SS-j4_mat

_R501-11
11 52 1529 275 423828 5086066 Going to head West across the new lava field. Small mounds of hydrothermal iron. Some white floc? A lot of iron deposits. Ridges of jumbled lava. Patchy mat covering. Big piles of jumbled, large ridge several meters high.  
11 58 1524 276 423786 5086068 In a venting area now. White mat, large crab, lots of floc, more mat. Waiting for the cage. Cage motor off. White filmy mat.  
12 1 1523 273 423789 5086069 Moving west again. White staining , bacterial mat, so far no major flow areas w/ tube worms, etc. Some tube worms. Down in an inaccessible pit area. Shimmering water. Lots of Fe sediments, perhaps some active places. Lots of iron sediments.  
12 6 1524 271 423867 5085664 Getting out of venting area. Lineate going S. Flat lineated flows. Lots of orange-tan sediment. Flows are glassy when they do crop out.  
12 9 1525 264 423720 5086056 Continuing west over ropy, lineated flows. Ropes becoming larger. Lots of mounds of orange hydrothemal sediment. Thick pockets of iron rich seds.  
12 13 1524 274 423661 5086047 Fe mat, orange seds R501-65
12 12 1524 255 423671 5086049 Thick deposits of iron rich seds. Moving west again. Jumbled ridges of pahoehoe lava. Lots of sediment. Steve's highlights on. Back into jumbled. Coming out of depression. Into glassy lobates. Collapse pit. Lobate on the other side.  
12 17 1521 268 423578 5086056 Big lobates, younger, lightly sedimented. Brittle stars. Big drain out.  
12 19 1521 271 423554 5086068   R501-66
12 19 1521 266 423554 5086068 Pit large drain out. Stop Steve's tape. Looking older. Back over lobate. Don't see the mat. Another drain out w/ lots of sediment at the bottom. At least 2 meters dep. Almost looked like a contact.  
12 24 1520 274 423500 5086064 thin roof near collapse R501-67
12 22 1521 276 423515 5086063 Lobates w/ brittle star, small sponges and holothurians. Drain out skylight. Don't see large sponges. Deep drain out pit, thin roof 10 cm. Big blocks in bottom. Younger against older? Small pockets of sediment.  
12 25 1521 287 423475 5086064 "Older" spire in collapse lots of large sponges on it younger lavas nearby R501-68
12 25 1521 270 423481 5086065 Drain out. Spire with lots of large sponges. Older spire with lots of glassy debris. one with a crab on it. Spires appeared to be older, because they had so many sponges on them.  
12 27 1521 271 423456 5086069 Back over lobate, with small sediment accumulation. No mat. There are brittle star. Collapse area w/chaotic lava. Lots of sponges on lava. Stop the ship on ridge of jumbled lava. Will try to grab for a rock.  
12 30 1522 291 423442 5086093 Grabbing a rock, older w/ sponges, attempting to place it in the port box. Right front of port box. Into the box. Free sponge included. Rck_R501-12
12 33 1521 304 423441 5086088 Starting the ship again. Drain back, on the top is a lineated flow w/ sponges on it. Still in a collapse area. A couple levels of collapse.  
12 34 1520 301 423411 5086077 Change VCR tapes. Lobates w/ holothorian and gorgonian. Water is murkier. Black glassy lobate flows with small amount of sediment. Drain pit. 1 meter collapse area. Gauge check.  
12 38 1523 283 423353 5086075 contact, very fresh now - so previous wasn't 1998 R501-70
12 38 1523 284 423353 5086075 Contact with new flow. Stop the ship to take a core sample.  
12 41 1523 252 423348 5086076 good fix. Looking at contact. Brittle stars on older, small sponges. New black, glassy overlapping new lava. Will try to get one core on each side of the contact.  
12 47 1524 257 422335 5085068 Will take core with the black stripes first. Grabbing w/ 5 function. Transferring to 7 function. Taking core, 12:49.second try, still not much, still trying, got it. Rck_core

_R501-13
12 54        Mashing glass into wax on the bio-box at a glass free spot. Going back for more glass on the chapstick corer. Mashing into BioBox, but it seems to reduce the amount of sample on the chapstick. Sample complete 1302  
13 4 1524 263 423348 5086073 Moving to older side of the contact. Much lighter albedo, more seds. more brittle stars. Breaking up the surface. Lifting the chapstick corer ( yellow striped). Grabbing corer with the 7 function arm.  
13 7 1523 296 423349 5086075 Attempting to collect core. Again attempting to mash the glass into the wax on the bio-box lids. Lost much of sample, will try to smash and smear back on. It seemed to work. Good amount of sample. Will go into bag directly, positioned on the other side Rck_core

_R501-14
        of the bag from the first sample. Appear to scrape some wax on BioBox. Finished with sample in the bag at 1314  
13 15 1524 295 422336 5085066 Attempting to trip Niskin. Tripped at 13:16. Evil Niskin strikes again. Ring is caught on 5 function. Free. Grabbing suction sampler handle. Niskin_R501-15
12 41 1524 254 423349 5086075 close-up of contact, likely 1998 flow R501-71
13 19 1523 292 423348 5086073 Ready to move West. Young lobates. Flat surfaces on the top. Telling the ship to move. Not much on lobates. Not much sediment cover. Holothorian. Waiting for the cage. A few brittle stars. Lobate flows.  
13 25 1523 283 423291 5086082 thin roof, at collapse area R501-72
13 24 1523 283 423311 5086072 Continuing West. Black glassy lobes. Collapse area, sediment covered blocks at bottom. Back to lobates. White areas on lobates. Big lobes. Glassy lobes. Lobates on flatter area.  
13 29 1523 286 423249 5086080 Lobates tops flat with rounded bottoms. More brittle stars. Lots of yellow iron sediment. Very glassy. Flatter area.  
13 32 1523 269 422600 5085461 Lots of broken up lavas, nav not good right now,  
13 33 1523 271 423201 5086066 good fix. Flatter flow, bucked up sheet flow. Broken up plates, big brittle star.  
13 37 1523 272 423162 5086068 Fairly glassy lobate flows w/ little sediment and some brittle stars.  
13 38 1524 277 422534 5085484 Still going over the same kind of lava.  
13 41 1525 279 423099 5086072 More sponges, more sediment, looks older. Higher density of brittle stars, may have crossed the contact. Still look like glassy lavas. Whole bunch of sponges.  
13 44 1526 306 423067 5086079 Ship is stopped. Getting ready to collect last chapstick sample.  
13 46 1526 308 423066 5086078 good fix. Picking up chapstick with 7 function arm. Core has two white stripes on it. Transferring to 5 function arm, regarding with 7 function arm.  
13 51 1526 304 423066 5086078 Core sampling, purple core, sample number 16 R501-73
13 49 1526 306 423066 5086078 This is the purple striped chapstick sampler (not white). Starting to core the glass. Atempting to do a light smush into the bio-box. Seems to have worked well. The key is the light smush. Attempting to place the core in Rck_core

_R501-16
14 0 1526 305 423066 5086078 Adjusting cores position in the bag. Bag closed. Regarding the suction sampler arm. Will be returning to cage.  
14 6 1500 323 423100 5086078 Back at the cage. Will be doing a 1.5 km transit.  
14 11 1423 20 423057 5086016 Beginning transect range 1475 meters, bearing 175 at 1 kt.  
15 24 1490 227 423214 5084635 Reached end of transect, going down to the bottom.  
15 27 1538 317 423188 5084617 On the bottom. Regrouping the suction sampler because it was flapping. Heading to Crevice to take a dead tube worm grab.  
15 33 1536 2 423478 5083771 Moving the ship 40 m to the NW.  
15 41 1537 328 423190 5084637 We are approaching a crevice, not THE Crevice. Big Keith is doing the air drums.  
15 42 1536 322 423175 5084649 good fix. A small, scraggly bush of tube worms. Maia is getting greedy - waiting for the big bush.  
15 44 1536 323 423169 5084655 Lava really isn't looking any different from the newer stuff that we've seen all along.  
15 45 1536 318 423157 5084638 We are looking around for a good grab - down into the collapsed area. Lobates still with a light coating of sediment/debris.  
15 48 1537 140 423399 5084861 Old tube worms and crab on edge of crevice. R501-74
15 47 1538 101 422817 5084266 Crab full of eggs. Nice view of the wall of the crevice. Some scanty tube worms on the wall. More crabs.  
15 49 1537 79 423163 5084654 Hit the edge of the crevice. Lateraling back along the crevice - moving east now. Crevice is around 5 m dep.  
15 51 1538 129 423152 5084633 Turned the corner in the crevice -now hdg almost due south. Finding a few larger tube worm bushes on the wall. Some larger bushes on the lobates on the roof. Tube worms all along the cracks between the lobates. TONS of crabs.  
15 54 1536 48 423166 5084617 Still on the roof. Looking for the crevice again. Jackpot - down in the crevice there is a huge clump of tube worms. A couple vent fish and a couple crabs.  
  15 57        A bit of flow, but doesn't look like there is much fauna besides a few live tube worms and a couple scale worms. x=3177 y=4620 good fix. Going in for the grab at 1557 Bio_R501-17
16 10 1539 35 423178 5084641 Just had a litle bit of an avalanche on top of the tube worm bush. Finished sampling. Keith just said that this is NOT part of the crevice, but just a hole in the roof.  
       Taking a quick look around to see what the area looks like - if there are any more large tube worm bushes about.  
16 13 1538 269 423171 5084630 Tubeworm bush lacking much of the other fauna you normally see. R501-75
16 12 1538 243 423170 5084630 All the tube worm bushes on top of the lobate roof look smaller - possibility that they are new worms since the eruption. Can't see any other fauna on the bushes.But the worms of the grab we just took look too large to be new since the '98 eruption.  
16 15 1531 87 423175 5084631 End of dive. Heading back to the cage and coming up.  
       ROPOS on deck at 1711 UTC  
       Dive Summary: This dive began by deploying the time lapse camera at Mkr-33 and collecting a suction sample. Next ROPOS transited to the west side of the 1998 lava flow, SW of Mkr-113 and started a geologic traverse due east.  
       ROPOS started the dive in older lavas and drove east to the contact with younger lava when the dive had to be temporarily stopped because the connector to the color camera light got pulled out and the suction sampler jammed.  
       After a quick turn around, the dive resumed at the western contact - driving east and taking rock samples all the way to the eastern contact between younger and older lavas. ROPOS then drove north along the eastern contact for about 400 meters and  
      then traversed back to the west in lavas known to be '98. A section of clearly older lava was crossed just north of Mkr-113, then back into '98 lava, and finally back into older lava again. 13 rock samples were collected during these two traverses.  
      Finally, ROPOS transited 1.5 km south to the Crevice Vent site to collect a tube worm grab.