L26 Tin American Geologist. August, i893 
of bo small size. It rises about six feet above the level of the lake, ex- 
tends across an inlet which has thus been lagooned, and throughout its 
length of about thirty rods has the form of a circular arc of 45°. The 
lagoon outside the beach is at least four feet higher than the lake, and 
has an area of about two acres, with a level bottom excepting a narrow 
belt around the Bhore, and at present contains one and a half feet of 
water, it being a wet season. In spring, or during heavy rains, a stream 
flows into this lagoon from the southeast, which drains a small pond and 
about 50 or GO acres of the adjoining hillsides. 
A section of the ridge from its summit to a depth of four feet reveals 
stratified sand and gravel, containing many pebbles from one to two 
inches in diameter, but mingled with mud throughout, which forms 
probably 25 per cent, of the entire deposit. The pebbles seem to be 
little waterworu, being like those found in summits of hills interpreted 
as glacial moraines. Here and there through the beach formation could 
be found a barely distinguishable stratum of pure sand, sloping toward 
the lake, with very uncertain continuation. The stratification of the 
material of this ridge could better be recognized at a distance of a few 
feet than by nearer examination. The general contour of the ridge cor- 
responds, however, so accurately to the type of beach ridges that there 
can be no question as to its origin. 
Passing along the ridge from its western end, one finds the summit 
there to form a nearly level plateau, about three rods wide, and a slight 
depression exists between the verge of the plateau toward the lake and 
its verge toward the lagoon. The whole formation bears the appear- 
ance of being two ridges thrown up at successive times, the last being 
two or three rods nearer the lake, fully as high as the first, and at some 
points higher. The first beach thus formed, or the side of it now ap- 
parent, terminates abruptly about midway between the two extremities 
of the ridge; but it rises again from the water four or five rods on, leav- 
ing in this break a kind of bay nearly two rods deep, indenting the 
beach deposit as far as to the second ridge. The break lies nearly oppo- 
site the mouth of the watercourse which enters the lagoon. It appears 
that the ridge in its earlier history had this break through which the 
stream current and the waters of the lagoon issued into the lake. The 
second beach formation dammed this channel, probably at a time 
when the lagoon was dry or when its bottom had been raised by sedi- 
ment so as to discharge its water into the lake, leaving no current to 
maintain the channel. 
It is a question of only a short time when the sediment carried in by 
the rills from snow and rain, and the mud deposited by snow drifted 
hither and melted, will raise the bottom of the lagoon to a level with 
the beach ridge which has dammed it up. Then people will see here a 
terrace with no conclusive indication of its origin. The writer has in 
mind two such terraces which he once endeavored to explain as delta 
plains, until characteristics in their formation clearly disproved this 
theory. In each case the face of the terrace sloping toward the lake 
consisted of stratified sand and gravel, while farther back the ground 
