462 CHARLES EMERSON PEET 



different levels of the gravel with the form of limited terraces, which 

 are due to the slumping down of the surface as the bank has been 

 undercut. A layer of sand containing marine shell fragments and 

 colored by the presence of vegetation was observed west of Mooers. 

 It underlies coarser gravel and sand. The exposure was not suf- 

 ficient to allow it to be determined whether the sand with the car- 

 bonaceous material represents an old soil or is a layer like some in 

 the Salmon River section, colored with vegetable matter. 



On the east side of the lake. — Marine shells in the form of Macoma 

 fusca and Saxicava occur at low levels. North of central Addison 

 Township Baldwin says they are common at levels below 150 feet, 

 and reach an elevation close to 250 feet at Vergennes. The writer 

 was unable, however, to find any up to that level south of Otter Creek 

 at Vergennes, and search was not made north of that place. Baldwin 

 also reports Macoma fusca at Shelburne Falls and Morses in strati- 

 fied sands up to 180 feet. In the northern part of Shelburne shells 

 which from descriptions are thought to be marine are reported, he 

 says, at 400 feet. If this is correct, it is the highest level at which 

 they have been found. The same writer reports shells of Saxicava 

 and Macoma fusca in the stratified sands of the 270-foot LaMoille 

 delta at Checkerberry village, on the south shore of Mallett's Bay 

 and in West Milton. 



Bones of a whale (Beluga Vermontana, Thompson) were reported 

 from Charlotte Township at 150 feet above the sea.^ Land-snail 

 shells have been found in high-level deposits at a number of points 

 in the southern Champlain region a few feet beneath the surface. 

 In one or two cases they appeared to be imbedded in the undisturbed 

 stratified materials of wave- wrought terraces. In most cases they 

 occur in a surface loam which has a very irregular contact with the 

 underlying drift. A number of things connected with their occur- 

 rence in the loam point to introduction in openings made by roots of 

 trees, but it is possible that some were buried contemporaneously 

 with the making of the wave- wrought terraces of the upper series. 



Moraines. — Above the upper series of terraces at a number of 



^Vermont Geological Survey, Report in 1849, Vol. I, pp. 162-65; ^^'^ Dawson, 

 "Cetacean Remains in Champlain Deposits," American Journal of Science, Vol- 

 CXXV (1883), pp. 200-202. 



