1 inapplicable? What is special about a canyon so that we cannot 



2 summarize from, say, the Georges Bank monitoring program, what is going 



3 on in canyons. 



4 Finally, I had a list, from what I saw yesterday, of what were 



5 some of the limitations of the available data that we have. What things 



6 do we know? There were a number of comments made where we don't know 



7 certain things very well that we need to know more. 



8 For each one of those questions, I have tried to make a list of 



9 sort of the highlights of the discussion yesterday. For example, 



10 particles entering the canyon from the shelf, I saw five things, five 



11 pieces of data which were presented yesterday, and on the right-hand 



12 side, I have a little table. 



13 This is the answer, yes or no, they do or they don't, whether the 



14 evidence is actually direct evidence or whether it is indirect, whether 



15 we have to infer something or whether we actually can measure whether 



16 particles are coming from the shelf, and then what canyon it applies to. 



17 Do we know it applies to all of them or is it a specific canyon? 



18 For example, I said particles enter the canyon from the shelf, and 



19 the data I showed of the flow regime, showing flow directly from the 



20 canyon, from the adjacent shelf into the canyon and some calculations. 



21 It says that yes, particles do enter the canyon from the shelf. 



22 It is essentially an indirect calculation because it is an 



23 indirect measure, because I don't actually measure the particles 



24 entering the canyon, I infer it. That was primarily for Lydonia, but I 



25 think from what we know about the residual circulation on the 



26 continental margin that we can pretty much say that is true of all the 



27 submarine canyons along the southern flank of Georges Bank. 



28 Actually, I had another column here which I couldn't fit on, which 



29 actually said this. But I said that. Mike showed some data showing 



30 direct measures of increased barium in the canyon axis and sediment 



31 traps during the course of drilling on Georges Bank. 



32 That was in Lydonia Canyon. That is a hard, direct measure of 



33 particles which we know were ejected on the shelf and we actually found 



34 them in the canyon, so I say the answer there is yes. 



185 



