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Wissahickon Formation
The Chemistry of Rocks in the Wissahickon Valley
Geologic Map of the Piedmont in the Savage and Relay Quadrangles, Howard, Baltimore, and Anne Arundel Counties, Maryland
SP20 Delaware Piedmont Geology
Bulletin of the Geological Society of America Vol. 63, Pp
A Foundation Failure in Philadelphia
Bulletin 19 of the Department of Geology, Mines and Water Resources
Using Topographic Map Interpretation Methods to Determine Tookany (Tacony) Creek Erosion History Upstream from Philadelphia, Pennsylvania, USA
Bedrock Geology of the West Grove Quadrangle, Pennsylvania-Delaware Piedmont
Watershed 03J, Poquessing
RI59 Bedrock Geology of the Piedmont of Delaware And
Walking the Wissahickon in This Issue: Article Contributed by Mike Edelman ~ Photos by Kevin Kelly
A Further Revision of the Stratigraphic Nomenclature of the Wissahickon Formation in Maryland
Section 1: Watershed Location and Setting
The Chopawamsic Formation a New Stratigraphic Unit in the Piedmont of Northeastern Virginia
Geohydrology and Ground-Water Resources of Philadelphia, Pennsylvania
Tacony-Frankford Creek River Conservation Plan
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Howell Bosbyshell , Leeann Srogi and Gale Blackmer
Top View
Philadelphia's Wissahickon Valley: Its Geology and Geography
Understanding Lower Neshaminy Creek Direction Change and Barbed Tributary Evidence, Bucks County, Pennsylvania, USA
Poquessing Act 167 Plan
G. W. WETHERILL G. L. DAVIS C. LEE-HU Rb-Sr Measurements On
Baltimore County
(Build 2600) Service Pack 2
Geohydrology of Southeastern Pennsylvania by Dennis J
Full Page Fax Print
Geologic Map of the Frederick 30' × 60' Quadrangle, Maryland, Virginia, and West Virginia
Water Use in Maryland a Workplan to Advance Water Use Science 2017-2020
Philadelphia County, Pennsylvania
Wissahickon Creek Drainage Basin Origin As Determined by Topographic Map Interpretation
Of the Lower Delaware