Publisher's Synopsis
Excerpt from Pennsylvania Glaciation First Phase: Materials for a Discussion of the Attenuated Border of the Moraine Described in Volume Z of the Second, Geological Survey of Pennsylvania
Native copper and crystalline rocks are found only in the extreme eastern and western parts of Pennsylvania in the drift of this Phase. In both localities ?oating ice seems to have played an important part. With no intention of claiming a Lake Superior origin for the Connecticut and Eastern Pennsylvania copper, the latter can not come from the Trias entirely, as it is found in Monroe County, north of Kittatinny Mountain. Western Pennsylvania copper certainly has a Keewatin origin, and the specimen was berg-carried.
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