1 Fred Grassle and I have been going around and around about that, 



2 • just to decide why that's the case, but that's what those profiles 



3 suggest on the analysis, using the simple mixing models which assume 



4 that biological reworking is very much like diffusion. That's the best 



5 we can do mathematically. It may not be a very accurate prediction of 



6 the real world, but in the trade it's an established first step. 



7 In using that technology, we get about the same mixing rate. You 



8 can make a case that it's a little bit greater in the canyon axis, but I 



9 really need to sit down with a biologist who has analyzed the organisms 



10 in those different samples and see if it's reasonable to expect that the 



11 accumulation rates might be the same--the mixing rates might be the 



12 same. 



13 DR. KRAEUTER: The second question, one of your slides of your 



14 sediment trap data, the deep one, about 1,200 meters, it looked like 



15 there were two things going on, you had a peak, I guess it was about 100 



16 meters above the bottom on it, and then the next level up, which I 



17 couldn't get down was almost zero and then it came back up again, 



18 I was wondering how you get that, how you explain that difference? 



19 DR. BOTHNER: Any chance we could see the slide again, I've 



20 forgotten. I think it's the second one--third slide, from the start. 



21 DR. KRAEUTER: The very bottom center, right in the axis, you see 



22 you've got a red bar and the an orange bar and then nothing, and the 



23 deep one is about the same. 



24 Is there just no sample in between them? 



25 DR. BOTHNER: There's no sample in between them. 



26 DR. KRAEUTER: So it's just the fact you didn't have a sampler 



27 there? 



28 DR. BOTHNER: Right. 



29 DR. KRAEUTER: I understand that. 



30 DR. BOTHNER: You make the point that--it's interesting, isn't it, 



31 that between 20 to 26 meters above the bottom and 100 meters above the 



32 bottom, it's about the same. 



33 DR. KRAEUTER: Right. 



71 



