Description: A map showing the probable preglacial drainage of western Pennsylvania, the limit of glaciation is shown by the broken crossed line.
Place Names: Pennsylvania, Erie, Meadville, Pittsburg, Franklin, Beaver
ISO Topic Categories: boundaries, geoscientificInformation, location, inlandWaters
Keywords: Preglacial Drainage of Western Pennsylvania, physical, political, physical features, geological, major political subdivisions, local jurisdictions, boundaries, geoscientificInformation, location, inlandWaters, Unknown,
Source: Isaiah Bowman, Ph. D, Forest Physiography (New York, NY: John Wiley and Sons, 1911) 599
Map Credit: The Private Collection of Roy Winkelman |
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