1 DR. HECKER: But it goes all over the place. What I am trying to 



2 say is that it is not straightforward that it just goes to the deep sea. 



3 DR. TEAL: Right. 



4 DR. BUTMAN: It may actually be a source of sediments to the slope 



5 downstream of the canyon mouth. 



6 DR. KRAEUTER: Let me follow that up, because yesterday, I was 



7 puzzling about the source of the sediments and how things got up and 



8 down and where they were. The thing I was finally trying to mentally 



9 compare it to were the inlets along barrier islands where you have both 



10 an ebb and a flood tidal delta. 



11 You can get the fines deposited at both ends, which all sorts of 



12 things happening in between. I don't know whether that is the proper 



13 way to look at this or what we are saying now. Everybody seems to be 



14 thinking everything is going down. 



15 The way I see the evidence is I don't see it is that clear, but 



16 maybe my idea is not the appropriate one. But that is the way it seemed 



17 to me, that the fines are accumulating like in an ebb and a flood tidal 



18 delta. 



19 DR. BUTMAN: I think what we would all like is a mass balance of 



20 sediments that come in and where do they go? How long do they stay 



21 there and where do they go? I guess my perspective is not quite ready 



22 to answer that question. 



23 These are some building block questions that we have got to go to 



24 first things first, that particles are entering and then we have got to 



25 say what happens to them once they get there. Our long-term objective 



26 would be to make some kind of a mass balance, both in the size and the 



27 fine particles for each one of those. 



28 DR. VALENTINE: I'd like to make one point here, that the 



29 California canyons are a much different geological environment than 



30 these. Their heads are closer to shore, are topographically high, an 



31 eroding coast. There is a lot more sediment supply. They are catching 



32 a lot more sediment. Mass movement is probably the main reason for the 



33 transport of the sediment to the deeper water. 



192 



