Pleistocene of the Champlain Valley. — Baldwin. 175 
together; the Saxicavas usually standing upright in their 
bore-holes in the day. Again, in West Milton, a short dis- 
tance east of A. A. Herrick's, the sand terrace of the 270 feet 
level is cut to a deptli of 70 feet, exhibiting a sand and clay 
deposit containing Saxicava and Ufacoma and exposing to- 
ward the head many large and finely glaciated boulders. Un- 
fortunately we could not find an exposure of the undisturbed 
strata, to discover the exact relations of the deposits: but, 
from the distribution of the boulders, it is probable that here 
is an esker or kame of about the same hight as the exposed 
esker in Panton, but the still higher sands of the delta cover 
this one. At Checkerberry Village, on this delta terrace at 
270 feet, we were informed that Saxicava and Macoma can be 
found in almost any excavation, a few feet below the surface. 
The next large delta is that of the Missisquoi,* covering 
with sand a large part of northern Swanton, southern High- 
gate, and Hog island, the last being just at the flood level of 
the present lake. 
From here north the higher levels are far back from the 
lake, and the Champlain valley opens into a great clay plain, 
which stretches out 25 or 30 miles on either side from the 
Richelieu river, north of Missisquoi bay, and which probably 
extends to Montreal and the St. Lawrence. I have not traversed 
it. Little or no rock is exposed anywhere in this plain. The 
surface of this plain is ribbed at distances of half a mile or 
so with beaches, which stand about 15 feet above the general 
level. Probably no part of the plain is more than 150 to 200 
feel above the sea. 
New York. 
Whitehall to the An Sable. On the west side the highest 
levelsare found near the lake in Washington county, but from 
Ticonderoga to Crown Point distinct terraces extend to 225 
feet. It is not probable that the marine terraces extend to 
hike George, though there seems to be a decided terrace at :?7(> 
feet at the south end of that lake. The lake itself is 320 feet 
*Geology of Vermont, vol.i, p. 145. This report seems to apply the 
term "delta" only to the deltas formed at the present lake level, while 
I have applied it to those deposits which were formed as true deltas at 
the higher levels, and pa6s over the present deltas as not pertinent to 
this discussion. 
