Could this be one of the two mentioned in
Stone Structures of the United States; Pedestal & Perched Boulders ?
Connecticut
1- Montville (west side of lower Thames River SE part of state): Full Pedestal boulder on three support stones placed on exposed bedrock. Two support stones are small. One support stone is a large triangular slab with point jutting outward. Triangular slab is propped up by a small stone under its narrow pointed end. The actual location within the town is not stated. This town has three stone chambers and a large cairn site. (Mavor & Dix, 1989: 111)
2- Brooklyn (east-central Route 6 & 169 west side of Quinebaug River): Full Pedestal boulder called “Tripod” because of three support stones placed in a triangle formation under the boulder. Boulder is on exposed bedrock. (Whittall, 1977: 55)
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