The Geology of Delaware

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Outcrop Cc12-a: The Cave at Brandywine Springs

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Rock Outcrop Cc12-a: The Cave at Brandywine Springs

Approximately 100 yards east of the tracks is one of the largest outcrops in the park. Here along the hillside, a thick layer of crinkle-folded, yellow-weathering gneiss overlies a layer of garnet-bearing quartzite and amphibolite. At the contact between the quartzite and the schist, a large piece of the quartzite has fallen out creating a small cave. Maybe Indians used this cave, but it is not very inviting. If you hit the black rocks with a hammer they will ring. Look for the tiny lavender garnets in the quartzite.

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Sandy Schenck talks to A.I. DuPont High School students about Geology in Brandywine Springs State Park.
Sandy Schenck talks to A.I. DuPont High School students about Geology in Brandywine Springs State Park.
Rock Outcrop Cc12-a: The Cave at Brandywine Springs