328 BULLETIN: MUSEUM OF COMPARATIVE ZOOLOGY. 
Half a mile east of Green’s Corners, stratified clay with a thin 
capping of gravel was found at an altitude of about 440 feet. This 
clay is high enough to have been laid down in Lake Vermont shortly 
before the marine invasion, but if it was so deposited the deposition 
took place prior to the last appearance of the ice in the vicinity, for 
west of Green’s Corners a till plain forms the valley floor a hundred 
feet below the altitude of the clay. 
About 8 miles west of the Green Mountains and midway between 
the Lamoille River and the Missisquoi River, in another longitudinal 
valley, a sand-plain nearly a square mile in area has an altitude of 
about 600 feet.! The village of Bakersfield is situated upon it. A 
mile northwest of Bakersfield and at the same level there is a small 
trenched proglacial delta with an ice-contact on the north side. Only 
a few rods west of the little delta, a well-defined esker, extending 
northward, ends abruptly in a transverse valley. No recognizable 
relation exists between the sand-plain and the esker, though the esker 
is more than a mile long, and in places more than 100 feet high. Half 
a mile southeast of Bakersfield the sand-plain gives place to kames. 
amongst which two lakelets fringed with sphagnum bogs still remain. 
‘Two and a half miles west of Bakersfield on the road to East Fair- 
field, banded clay which contains scattered boulders as large as a 
foot in diameter was found in a cut at an altitude of about 500 feet. 
The boulders were probably dropped by floating ice. It is very 
probable that the waters of Third Lake Lamoille extended far enough 
north to have determined the level of the Bakersfield sand-plain and 
other lacustrine deposits in the vicinity. 
—. — The Main Valley. The uppermost terrace along the Missis- 
quoi River north of Bakersfield and Sheldon is so gently sloping down 
the valley that, whether it is entirely due to stream aggradation or to a 
combination of processes such as have already been discussed, it 
can be but a few feet above the level of a body of water into which the 
river emptied at the time the terrace was forming. An ice barrier 
at the mouth of the valley, or an arm of the sea at a stage immediately 
succeeding the upper marine stage may have determined the altitude 
(430 feet) of this terrace. 
SUMMARY AND CONCLUSIONS.— The main valleys of northwestern 
Vermont drain westward. Owing to their opening into the low 
Champlain valley which largely controlled the direction of retreat of 
1 This figure in based upon several barometric determinations from Swanton as & 
base. The figures for the altitudes of Sheldon and E. Fairfield are interchanged im 
Gannett’s Dictionary. 
