ammonites
USGS 17717 (Cretaceous of the United States)

Also known as martial in place in marshalltown on south side of Chesapeake and Delaware canal, about 100 feet east of summit bridge, Del.

Where: Delaware (39.7° N, 75.7° W: paleocoordinates 39.2° N, 45.5° 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 C. W. Carter 1935-7

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 6154: authorized by Matt Kosnik, entered by Matt Kosnik on 30.01.2000