| Patuxent Formation | |
|---|---|
| Stratigraphic range: | |
 . View at School House Hill, Baltimore County, Maryland showing the Patuxent Formation overlain by the Arundel Formation | |
| Type | Sedimentary |
| Unit of | Potomac Group |
| Underlies | Arundel Formation |
| Overlies | Basement |
| Thickness | up to 250 feet (80 m) |
| Lithology | |
| Primary | Sand, Gravel |
| Other | Clay |
| Location | |
| Region | Atlantic coastal plain |
| Country | U.S.A. |
| Extent | Maryland, Washington D. C., Delaware, Virginia |
| Type section | |
| Named for | Patuxent River |
| Named by | W. B. Clark, 1897[1] |
The Patuxent Formation is a Cretaceous geologic formation of the Atlantic coastal plain.
- ^ Clark, W.B., 1897, Outline of present knowledge of the physical features of Maryland: Maryland Geological Survey Volume Series, v. 1, pt. 3, p. 172-188.