Saturday, October 10, 2009

last kasten core

good morning, Sunshine!

slept through my alarm today! awakened by goldfinger's pounding on my
door. there was a piston core on deck and the entire night shift was
absent. at least i was not the only one... but, i jumped right into my
deck gear and helped the coring crew deploy what is likely to be our
last kasten core (they are several hundred pounds and are too heavy
for me to help lift).

after this site we will collect a core in a shallow core site to
attempt to find a location that has no gravity flow deposits. this
will permit us to make a background hemipelagic sedimentation rate.
the depth of this core is ~1,600m, so the sed rate will be a little
different than our deeper 'turbidite' filled cores, but it is the best
we can do. also, being shallower, the foram abundance will be greater
(since the carbonate compensation depth, the depth where calcium
carbonate - what composes the foram skeletons or 'tests' - dissolution
outpaces the rain rate of these particles, limits the abundance of
forams at the greater depths of the 'turbidite' cores)

ok, time to get going, over and out, jay

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