ammonites
USGS 16223 (Cretaceous of the United States)

Also known as 5 to 10 feet above base of formation, Chesapeake and Delaware canal, south side, 600ft west of Penn Central Railroad's Chesapeake and Delaware canal bridge

Where: New Castle County, Delaware (39.5° N, 75.7° W: paleocoordinates 39.0° N, 45.6° W)

• coordinate based on nearby landmark

• small collection-level geographic resolution

When: Marshalltown Formation, Late/Upper Campanian (83.5 - 70.6 Ma)

Environment/lithology: marine

Reposited in the USGS

• Collected by L. W. Stephenson 15 sept 1932

Primary reference: J. P. Owens, J. P. Minard, N. F. Sohl and F. James Mello. 1970. Stratigraphy of the outcropping post-Magothy Upper Cretaceous formations in Southern New Jersey an Northern Delmarva peninsula, Delaware and Maryland. USGS Professional Paper 674:1-60 [M. Kosnik/M. Kosnik/M. Kosnik] more details

Purpose of describing collection: biostratigraphic analysis

PaleoDB collection 6144: authorized by Matt Kosnik, entered by Matt Kosnik on 30.01.2000