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Bryn Mawr Formation

Bryn Mawr Formation - High-level terrace deposits; reddish-brown gravelly sand and some silt. Age uncertain.
StatePennsylvania
NameBryn Mawr Formation
Geologic ageTertiary
Original map labelTbm
Primary rock typegravel
Secondary rock typesand
Other rock typessilt
Lithologic constituents
Major
Unconsolidated > Coarse-detrital > Gravel (Terrace)reddish-brown gravelly sand
Unconsolidated > Coarse-detrital > Sand (Terrace)reddish-brown gravelly sand
Minor
Unconsolidated > Fine-detrital > Silt (Terrace)
Map references
Pennsylvania Bureau of Topographic and Geologic Survey, Department of Conservation and Natural Resources, 2001, Bedrock Geology of Pennsylvania, edition: 1.0, digital map. Retrieved from internet 9-30-2004; <http://www.dcnr.state.pa.us/topogeo/map1/bedmap.aspx> DL Data: pageoexp.zip
Unit references
Berg, T. M., Edmunds, W. E., Geyer, A. R., and others, compilers, 1980, Geologic map of Pennsylvania: Pennsylvania Geological Survey, 4th ser., Map 1, 2nd ed., 3 sheets, scale 1:250,000.
Pennsylvania Bureau of Topographic and Geologic Survey, Department of Conservation and Natural Resources, 2001, Bedrock Geology of Pennsylvania, edition: 1.0, digital map. Retrieved from internet 9-30-2004; <http://www.dcnr.state.pa.us/topogeo/map1/bedmap.aspx> DL Data: pageoexp.zip
Geographic coverageBucks - Chester - Delaware - Montgomery - Philadelphia

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