ammonites
Patuxent River - 0.85 mile below Nottingham (Miocene of the United States)

Also known as USGS Locality 26368

Where: Calvert County, Maryland (38.7° N, 76.7° W: paleocoordinates 38.9° N, 72.3° W)

• coordinate based on nearby landmark

• outcrop-level geographic resolution

When: Calvert Formation (Chesapeake Group), Early/Lower Miocene (23.0 - 16.0 Ma)

• 0.5 feet thick bed

• bed-level stratigraphic resolution

Environment/lithology: coastal; poorly lithified, fine-grained, medium, gray, yellow sandstone

• Sandstone, indurated, yellowish-gray (5 Y 8/1), fine- to medium-grained; some pebbles, Pecten humphreysii as molds

Size class: macrofossils

Preservation: mold/impression

Reposited in the USGS

Primary reference: L. W. Ward. 1985. Stratigraphy and Characteristic Mollusks of the Pamunkey Group (Lower Tertiary) and the Old Church Formation of the Chesapeake Group-Virginia Coastal Plain. United States Geological Survey Professional Paper (1346)1-77 [A. Miller/D. Buick] more details

Purpose of describing collection: biostratigraphic analysis

PaleoDB collection 60870: authorized by Arnold Miller, entered by Devin Buick on 26.05.2006