MODIFIED DRIFT OF THE LAKE DISTRICT. 127 
feet high. Another tributary to the lake a mile farther south-east is bor- 
dered by terraces of similar height near its mouth. On the north-east 
side of Twenty-mile bay, two miles south from Melvin village, a bold 
shore of coarse till, with many large boulders, is bordered by an old 
beach, about 300 feet long and 100 wide, which slopes from the water's 
edge to ten or twelve feet above high water. It is composed of fine 
stratified sand, which is clayey below a foot or two of the surface. No 
tributary occurs here, but a small stream at an eighth of a mile south- 
east has brought down considerable alluvial sand, none of which, how- 
ever, lies more than five feet above high water. 
Kames. Half a mile farther south we find a kame extending two 
thirds of a mile from north-west to south-east along the top of a hill 
about 100 feet above the lake. It does not form a definite ridge, and could 
hardly be distinguished from the till by its contour. Its materials are 
coarse and fine gravel and sand interstratified. Boulders are enclosed in 
many portions, but a well at Charles G. Edgerly’s, 30 feet deep, encoun- 
tered no boulders, being all the way through sand or fine gravel. Nine- 
teen-mile bay and brook are a half mile farther south. Here the road 
passes over the alluvium brought down by this brook, which, like that at 
the head of Twenty-mile bay, is only three or four feet above the lake. 
Nineteen-mile brook is bordered by considerable widths of low alluvium 
for two miles above its mouth, to where it is crossed by the road a mile 
and a half south from Mackerel Corner. From the brook to this village, 
and for a half mile farther north, kame-like deposits of limited amount are 
seen here and there at heights of 100 to 200 feet above the lake. East 
from this road interesting kames extend more than a mile along the 
north-east side of Nineteen-mile brook. These cover a width of a fourth 
of a mile, consisting of successive small plains from half an acre to two 
or three acres in extent, usually surrounded by hollows, and rising one 
after another from 30 or §0 to 100 feet above the stream, or fully 150 feet 
above the lake. These small level-topped deposits consist of sand and 
water-worn gravel, with the largest pebbles about one foot in diameter, 
Boulders are occasionally but not frequently enclosed. These kames 
begin about two miles south-east from that described between Twenty- 
mile and Nineteen-mile bays. These and the similar deposits which oc- 
casionally appear about Mackerel Corner probably had a common date 
