Bryn Mawr Formation

High-level terrace deposits; reddish-brown gravelly sand and some silt. Age uncertain.
State Pennsylvania
Name Bryn Mawr Formation
Geologic age Tertiary
Lithologic constituents
Unconsolidated > Coarse-detrital > Gravel (Terrace)reddish-brown gravelly sand
Unconsolidated > Coarse-detrital > Sand (Terrace)reddish-brown gravelly sand
Unconsolidated > Fine-detrital > Silt (Terrace)

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, Miles, C.E., and Whitfield, T.G., compilers, 2001, Bedrock Geology of Pennsylvania, edition: 1.0, digital map, scale 1:250,000.

NGMDB product
Counties Bucks - Chester - Delaware - Montgomery - Philadelphia