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DGS Annual Report

DGS Annual Report of Programs and Activities.

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Site content related to keyword: "Chestnut Hill"

Outcrop Da15-h: The Paraglacial Boulder Feature of Chestnut Hill

Rock Outcrop Da15-h: The Paraglacial Boulder Feature of Chestnut Hill

Prime examples of Iron Hill Gabbro can be found in the area surrounding Chestnut Hill at Rittenhouse Park. The gabbro here is considered coarse to very coarse grained. Boulders of Iron Hill Gabbro are located on the northeast facing slope southwest of the Christina Creek. This gabbro boulder field is probably a paraglacial feature left over from ice age times deep in Delaware’s geologic past.