|Name||Bryn Mawr Formation|
|Geologic age||Age uncertain|
Unconsolidated > Coarse-detrital > Sand
Unconsolidated > Fine-detrital > Clay
Unconsolidated > Fine-detrital > Silt
Unconsolidated > Coarse-detrital > Gravel
|Comments||age undetermined. On PA state geologic map, the Bryn Mawr Formation is considered to be Tertiary in age.|
Spoljaric, Nenad and Jordan, Robert R., 1966, Generalized Geologic Map of Delaware SP4, State of Delaware, Delaware Geological Survey, scale ca. 1:300,000. Digitized by the Water Resources Division of the U.S. Geological Survey in the mid 1990's.