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[[underline]] December 5. - continued. [[/underline]]
No sticks or stems nor impressions of such were found in these lower rocks, large blocks of which have become detached and lie isolated at the foot of the cliff, but one of the large projecting crags has a peculiar horizontal perforation parallel to the beach. It is triangular in shape and large enough for the arm to be thrust in at either end, but the tube is not straight so that light cannot be seen through it, although it seems to be continuous. It is five or six feet long and has the appearance of having been produced by a crooked log or stick, the substance of which has disintegrated and disappeared. 
But for the green glauconitic clay pockets there would be no trouble in considering Nos. 1 and 2 as Potomac. No 3 is the most puzzling, and it is very hard to decide where to place it. No. 4 is the most distinct & satisfactory and continuous without
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interruption along the entire face of the cliff, not having any appearance of being a lens, though varying in thickness from two to 5 or six feet. As to the Columbia, through [[insertion] ^ ou [[/insertion]] t this entire region the brick clay is usually underlain by a bed of pebbles or cobble, which must, I suppose, be distinguished from the boulder member, supposed to be younger. It can hardly represent the Lafayette, as it occurs at the water's edge as well as at the top of the cliff, and is doubtless due to the assorting conditions of deposition that existed at the time.
Above the log-slide the bluffs rise still higher, reaching nearly or quite 100 feet at the highest point of which a rough section was given on Nov. 20. In that section I put the present Nos. 1 & 2 together under Potomac and Nos. 3 & 4 together under Tertiary. The cliff is too steep to scale and my examination was less close and minute. The present section is the result of a thorough inspection of every part and