1 If our data interpretations are correct, these are important 



2 erosive agents on the upper slope and outer shelf. 



3 Now, if we look at the deeper sedimentary environment into the 



4 heads of the gullies on the upper slope, we see that the walls of the 



5 gullies are 30 to 40 degrees in slope, covered with a very silty sand, 



6 the burrowing is very minimal because of the cover of fine-grained 



7 sediment here, although the clay that you saw in the video tape that 



8 Dick Cooper showed is present beneath this cover. 



9 There is too much of it for the organisms to really do an 



10 extensive borrowing job. 



11 This shows what happens when the submarine gently touches the wall 



12 of that gully. You can see resuspended silt and clay. This is the 



13 floor of a gully which shows an accumulation of dead worm tubes and 



14 venus fly trap anemones. We saw no indication of sediment movement in 



15 the bottoms of these gullies, no bedforms. 



16 As I said, the sediment is 30 to 40 percent silt and clay, and 



17 appears to be, at present, a depositional environment. Now we are going 



18 to look at the shelf area around the canyon, around the canyon rims. 



19 As I mentioned, sediment is moving into the canyons from the shelf 



20 and around all sides of the canyon, in particular we want to look at the 



21 rims of the canyon. This is a map of Oceanographer Canyon. 



22 The green color depicts the presence of gravel pavement, across 



23 which very strong pavements flow, up to 50 cm/sec that we have 



24 encountered in our submersible dives, and that Brad Butman has 



25 documented in a similar area in Lydonia Canyon. 



26 This is a view looking up the canyon wall on the east rim of 



27 Oceanographer Canyon showing this gravel pavement, showing build-ups of 



28 shelf sand that have moved through the pavement and are in transit into 



29 the canyon. So, this is an area of sediment transport where shelf sand 



30 is being transported through the gravel into the canyon. 



31 The western rim of the canyon is a combination of gravel and sand, 



32 and the currents are much weaker over there and there is no development 



33 of a gravel pavement. There is a similar gravel bed on the east wall of 



37 



