Chester-Blandford State Forest, Boulder Park.  If you were standing on this site 15,000-18,000 years ago, you would have been beneath a two mile thick glacier known as the Laurentide Ice Sheet of the Wisconsinan Glaciation. Frozen within the ice sheet were the large boulders of Boulder Park. As the glacier melted, it dropped both the boulders and a good ten-foot-thick layer of stony “till.” The boulders were collected as the glacier made its progress south across New England. Today, you can find pieces of white marble in the park carried from a layer in the bedrock farther north and west in the Berkshire Hills and Vermont. At this spot in Boulder Park, you can see a particularly dense patch of boulders that gives us an idea of what the region looked like before humans began terracing slopes, and moving and breaking up the stones for cleared agricultural land. Strewn across the bedrock slopes and escarpment that are part of the Berkshire Hills, the boulders themselves are metamorphic and igneous rocks that are highly resistant to erosion.

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