1 blankets the canyons and the slope, it is mostly silt and clay. There 



2 is some sand in there, but very fine grained. 



3 If you find coarser sand in the deep axis, then you can make the 



4 assumption that it is coming from the canyons because there is no other 



5 place it could come from. 



6 DR. BUTMAN: Because it is not on the slope. 



7 DR. VALENTINE: But we don't have that data. 



8 DR. BUTMAN: Right. We'll add that to the list of limitations. 



9 I'll do that right now. 



10 Here is the next question or the next statement. The fine grained 



11 sediments accumulate in the canyons. I said fine grains, because we are 



12 interested more in pollutant accumulation rather than the coarser 



13 grained sediments. 



14 Maybe we should say both fine grain and sands, but this list is 



15 really for--this evidence is really more for the finer sands and silts 



16 and clays rather than the coarser sands. 



17 Again, I think the most direct evidence is in Lydonia Canyon and 



18 it was the measured accumulation rates which Mike showed from piston 



19 cores in the head at about 150 meters, which showed accumulation rates 



20 of 60 centimeters per 1,000 years. That was in two locations and that 



21 is fairly clear, direct evidence. 



22 Page used the texture and bed forms to infer that in 



23 Oceanographer Canyon there is no accumulation of fine-grained sediments, 



24 at least along the axis, whereas in Lydonia Canyon, we used texture and 



25 the absence of bed forms to indicate that there probably is at least 



26 some net accumulation. 



27 Again, the high resolution profiles at the head of Lydonia, which 



28 show a thick wedge of sediment in the same area of the measured 



29 accumulation again, is slightly indirect evidence but, again, I think 



30 fairly solid evidence that there is accumulation in the head of Lydonia, 



31 anyway. 



32 I don't think we actually have that data in the head of 



33 Oceanographer, do we? Has there been any high resolution work in the 



34 head of Oceanographer showing any-- 



194 



