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1.

Geology - Geologic Formations: Maryland University Of Maryland university-of-maryland

2016. DNR. This file of geologic unit polygons is for educational use. There are known errors and omissions. The file is part of a recompilation of the 1968 G...

2.

Geology - Physiographic Provinces: Maryland University Of Maryland university-of-maryland

2016. DNR. This data layer contains the Province-level physiographic subdivisions of Maryland in ArcGIS format. The file was developed from components of a de...