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Trenton Gravel

Trenton Gravel - Gray or pale-reddish-brown, very gravelly sand interstratified with crossbedded sand and clay-silt beds; includes areas of Holocene alluvium and swamp deposits.
State Pennsylvania
Name Trenton Gravel
Geologic age Quaternary
Primary rock type sand
Secondary rock type clay or mud
Other rock types silt; gravel; alluvium
Lithologic constituents
Major
Unconsolidated > Coarse-detrital > Sand (Alluvial)Gray or pale-reddish-brown, very gravelly sand interstratified with crossbedded sand
Unconsolidated > Fine-detrital > Clay (Alluvial)clay-silt beds
Minor
Unconsolidated > Coarse-detrital > Gravel (Alluvial)Gray or pale-reddish-brown, very gravelly sand interstratified with crossbedded sand
Unconsolidated > Fine-detrital > Silt (Alluvial)clay-silt beds
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
Counties Bucks - Delaware - Philadelphia