380 G. H. Stone—Terminal Moraines in Maine. 
few places along the roads the deeper cuts show masses of strati- 
fied sand and gravel underneath unstratified till, and these sedi- 
ments are in some cases plainly cross-bedded. There are no 
signs of a land-slide here, indeed the slopes of the neighboring 
hills are too gentle for that. Are these hummocks the work of 
the great ice-sheet or of a local glacier? There are in Maine 
very many deep sheets and ridges of till left by the ice-sheet 
across east and west valleys, but these hummocks in question 
are a different kind of ridge from the gently sloped ridge of 
ice-sheet construction. If these small and steep masses are 
remains of a broad sheet of till irregulariy eroded, then in the 
depressions between the hillocks there ought to be found an 
abundance of the larger stones and bowlders of the till, such 
as are found in the present bed of the stream. 
About one-third of a mile east of this point and at nearly 
the same elevation above the sea (215 to 230 feet), there is at 
the Fair Ground a terrace of stratified sand and silty clay. No 
fossils have been found in these beds, but at Winthrop Village 
and at an elevation only a few feet less, marine shells are com- 
mon in sedimentary clay. It thus appears that in Champlain 
time the sea extended from the Kennebec: Bay of that period 
westward to Winthrop. But Winthrop and Readfield are at 
opposite ends of Lake Maranocook and if the sea extended to 
Winthrop it would necessarily reach to Readfield unless kept 
back by a barrier of ice. Probably the sedimentary beds at 
and near the Fair Ground, Readfield, were Champlain shore 
deposits and the hummocks of mixed till and sediments in the 
western part of the village were formed where the local valley 
glacier confronted the narrow arm of the sea. 
8. The Swan Island Moraine-—Swan Island is an island in the 
Kennebec River. It begins near Richmond and extends for 
about four miles southward. About one and one-fourth miles 
from the southern end and on the eastern side of the island is 
an east and west ridge about one-fourth mile long that is prob- 
ably a terminal moraine. It appears to have suffered consid- 
erable surface erosion by the Champlain sea. A short kame 
is found near the western end of this ridge. The marine clays 
cover the flanks of both kame and moraine so as to disguise 
their relations to each other. 
4, The Sabattisville Moraine-—A short distance south of the 
bridge at Sabattisville is a two-sided ridge of till which ex- 
tends for a little more than one-eighth of a mile across the val- 
ley of the Sabattis stream. The ridge rises from eight to 
fifteen feet above the plain of marine clay and is composed of 
quite sandy till, as if gently water-washed. The steepness of 
the ridge on both sides and its east and west direction mark it 
as a terminal moraine. The ridge is partly within the village, 
