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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 PennsylvaniaNative 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 floating ice seems to have played

Title : 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 (Classic Reprint)
Author : Edward Higginson Williams
Language : en
Rating :
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Type : PDF, ePub, Kindle
Uploaded : Apr 07, 2021

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