February 23, 1999
Starboard (and then port) Observer Eric C. Bergmanis
Mostly starboard observer Cindy Lee Van Dover, pilot Dudley Foster
Time Hdg Depth Description
08:42 1050 Commencing Maggie spin
08:49 Completed two Maggie spins
09:43 304 2576 Bottom sighted, appears to be lobate flows with a light dusting of sediment.
09:50 Stop 2577 Lobate flows with light dusting of sediment, glass is reflecting our lights, age 1-1.5? Some small collapses visible in the surface of the flow. Some lobes have folded curtain-like lava texture on surface.
09:56 Stop 2583 Sample 1, lobate crust near collapse
10:13 088 2583 Lobate transitional to pillow, age 1-1.5, light sediment, lots of shiny glass visible. Some pillows ornamented with buds.
10:14 091 2580 Lobate and pillow flow, little sediment, lots of glass visible.
10:15 087 2581 Pillow flow appears quite young, very little sediment, no significant accumulation of seds in pockets between pillows. Lots of shiny glass reflecting our lights. Flow Contact?
10:19 092 2577 Young-looking lobate flow with small collapses. Lava surface is carpeted with stalked barnacles and mussel shells, mostly dead.
10:21 085 2578 Young lobate flow with lots of barnacles and mostly dead mussel shells.
10:22 080 2578 Anenome field on young lobate flow.
10:26 Stop 2578 At WP2, very young lobate flow. Very little sediment, lots of glass visible. Much biological activity here, anenomae, starfish, crabs, and fish.
10:29 004 2580 On to WP3, young lobate and pillow flow, just passed area relatively free of biology, surface very fresh and glassy. Right here, though, great deal of biology, mussels, mostly dead, fish, barnacles, starfish, crabs and gastropods. Water is quite turbid here.
10:34 Stop 2579 At WP3, X 1173 Y 242, searching for good place to sample mussels, most appear dead but there are a few healthy-lookoing clumps scattered about. Young lobate flow largely obscured by various sorts of biology type stuff.
10:39 Stop 2581 Cindy and I have switched places, I'm now on the port side. Going for bio sample #1, mussel pot.
10:41 Stop 2582 Shimmering water at 9° C. Lots of biology
here, most mussels dead or unhealthy, a few scattered healthy
clumps. Lots of crabs, gastropods, starfish, anenomae, fish, ugly
translucent worm-like things.
10:55 Stop 2581 Bio sampling in same area. Young lobate flow surface obscured by bio-stuff.
11:54 309 2582 Have left bio-sampling site near WP3. Filled 3 mussel pots and scooped 1 box at 1st bio-site. Are moving 10-15 meters to next sampling site. Still on young lobate flow with shimmering water coming out of surface.
12:06 Stop 2581 ~20 meters away from previous site, terrain very similar. Young lobate flow, some shimmering water, lots of biological activity. Most mussels appear dead, but there are a few scattered clumps of healthy guys.
12:13 Stop 2581 Barely perceptible shimmering water.
12:55 Stop 2581 Low T probe shows water temperature of 9.2° C.
13:18 2580 Have completed sampling and are heading to WP4 on a geology tour.
13:28 090 2582 Young lobate flow, surface appears to be mantled with hydrothermal sediment. In anenomae field.
13:30 325 2580 Lobate flow with light dusting of sediment, age 1.0. We are near a black smoker area, not clear if some of this sediment is hydrothermal in origin. Shiny glass surface visible.
13:32 320 2585 Lobate flow with shiny glass visible, glass fragment litter the surface. Light dusting of sediment. Many anenomae in this area.
13:34 Stop 2584 Sample 2, Flow contact? Young pillow and lobate appears to overly an older lobate flow here.
13:48 330 2582 Pillow and lobate flow, with a few patches of sheet-like morphology. Collapse pit in flow surface ~1m across, 30cm deep.
13:51 328 2581 Traveling over lobate flow that appears to be slightly older than bio-sampling site flow. Numerous collapse pits in flow surface from <1-7m across, <1-5 m deep. Some have bathtub ring selvedges in walls. Lobate pillar-arch structure here, appears to have once been inflated flow that has since drained out. Collapse pits common in this flow but not in youger flow to east.
13:53 330 2582 Right here the lobate flow does not have many collapse pits. Age ~1.5. Glassy flow surface visible through light sediment cover.
13:58 Stop 2583 Sample3, at WP5. Lobate flow with light
dusting of sediment, appears to be of roughly similar age as lobate
flow we landed on this morning.
14:05 090 2583 Taking off and heading due east to find western margin of young flow.
14:07 091 2582 Lobate flow locally transitional to pillows with light dusting of sediment. Shiny glass shows through sediment.
14:08 091 2581 Collapse pit ~15m across, 7m deep with bathtub rings very evident in both walls.
14:10 095 2584 Lobate flow age 1, light sediment cover and collapse pits common.
14:13 091 2586 Lobate flow with light sediment, few anenomae, glass visible. Appears to be the same flow we have been traveling over since about 13:30.
14:15 090 2587 Pillows with buds. May simply be morphology change within the same flow.
14:17 091 2586 X 1396 Y 504 Lobate transitional to pillow flow, not clear if this is the younger flow. Light sediment, much glass visible.
14:19 084 2587 Pillows transitional to lobate, age 1. Some buds.
14:20 085 2586 Morphology is dominated by pillows, appears to be slightly younger than lobates we were just over. Flow contact?
14:24 Stop 2584 Sample 4, pillow flow with many buds. Appears slightly less sedimented and glassier than previous lobates.
14:27 087 2581 Pillow flow, appears as if it may be slightly
younger than lobates to west, not very clear flow contact. More
sessile biological critters here.
14:29 090 2582 Lobate flow with lots of vitreous glass and spaghetti
worms.
14:31 090 2587 Pillow flow heavily ornamented with buds. Many pillow are 2-3 long. Sediment cover seems to vary locally, may be a function of smooth vs. rough flow textures that tend to collect more sediment.
14:33 089 2591 Flow contact, eastern margin of younger pillow flow - western margin of older lobate flow. Slightly heavier sediment cover, less glass shining through.
14:34 Stop 2594 Sample 5, lobate flow with dusting of sediment that appears heavier than on pillow flow to west.
14:45 235 2593 Heading southwest on older lobate flow, attempting to intercept eastern margin of young pillow flow.
14:47 235 2594 Lobate flow, moderate sediment cover. Glassy surface visible through sediment.
14:48 232 2593 Locally morphology changes back and forth from lobate to pillow, many of which are ornamented with buds. All appear to have the same sediment cover. Considerable relief in flow (3-4m), pillow and lobes are large, spaces in between them may be 2-3 m deep.
14:51 236 2593 Lobate and pillow flow with moderate sediment cover and glass reflecting our lights. Very little sessile biological activity.
14:52 236 2590 Small pillow mound, many heavily ornamented with buds.
14:54 235 2584 Dominantly pillow morphology, age 1.5. Light sediment cover. Glass on tops of pillows just obscured by sediment, but smooth buds on sides are very shiny and sediment free.
14:56 250 2580 Turning 15° more to west atempting to intercept younger flow. Lobate transitional to pillows with light sediment cover, shiny glass visible.
14:57 250 2577 Lobate with curtain-like flods on surface. Collapse pit 3m across, 1m deep with rubble at bottom.
14:59 250 2579 Flow contact, eastern margin older lobates,
western margin younger pillows. Slightly less sediment cover,
a lot more shiny glass visible.
X 1597 Y 281
15:03 Stop 2580 Sample 6, pillow flow younger than lobates
to east. Very little sediment, lots of glass, a few spaghetti
worms.
15:05 Stop 2580 Dropping weights, we're outta here.