| Eastern Mohawk Valley | |
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Here's the view north across the Mohawk Valley from near the town of Cherry Valley. According to the state geologic map, we're looking backward in time from shale and limestone of Devonian age (about 350 million years), to more distant Silurian rocks of the same kind, to shale and siltstone of middle Ordovician age, some 450 million years. On the horizon are foothills of the Adirondack Mountains, crystalline rocks of Precambrian age.
(c) Copyright 2002 Andrew Alden, licensed to About.com, Inc.
