Twelve or fifteen of these may be seen.
From appropriate positions on the surface of Lake Tahoe, also, all the moraine ridges are beautifully seen at once, but the glacial lakes and the canyon-beds, of course, cannot be seen.
There are several questions of a general nature suggested by my examination of these three glacial pathways, which I have thought best to consider separately.
_a.

Evidences of the existence of the Great Lake Valley Glacier_.

On the south shore of Lake Tahoe, and especially at the northern or lower end of Fallen Leaf Lake, I found many pebbles and some large bowlders of a beautiful striped agate-like slate.

The stripes consisted of alternate bands of black and translucent white, the latter weathering into milk-white, or yellowish, or reddish.

It was perfectly evident that these fragments were brought down from the canyon above Fallen Leaf Lake.