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Summary |
This
is is a cross section of the local bedrock geology. The section is from
west to east (left to right) looking north and illustrates the several
Triassic and Jurassic age formations. Saltonstall ridge is formed by the
Holyoke basalt which outcrops in the ridge just west of the lake. Erosional
processes, mostly glaciation, scoured out the softer East Berlin formation
leaving the depression which now contains lake Saltonstall. The top of
the ridge is about 60 meters above the lake.