Where: New Castle County, Delaware (39.8° N, 75.6° W: paleocoordinates 39.2° N, 45.5° W)

• coordinate based on nearby landmark

• outcrop-level geographic resolution

When: Didymoceras cheyennense ammonoid zone, Mount Laurel Sand Formation, Late/Upper Campanian (83.5 - 70.6 Ma)

• STRATIGRAPHIC RELATIONS: From the Mount Laurel Sand, which regionally overlies the Marshalltown Fm (Campanian), and is unconformably overlain by the Columbia Fm (Quaternary). AGE: Late Campanian, on the basis of ammonite biostratigraphy; Didymoceras cheyennense zone and part of the Baculites compressus zone. STRATIGRAPHIC POSITION: From beds within section of 8 ft in thickness.

• group of beds-level stratigraphic resolution

Environment/lithology: coastal; lithified, burrowed, phosphatic, silty sandstone

Size class: macrofossils

Preservation: cast, mold/impression, replaced with phosphate

Reposited in the USNM

Collection methods: surface (in situ),

• COLLECTORS: Multiple collectors, including members of the Monmouth Amateur Paleontologists Society (MAPS). REPOSITORY: USNM and Monmouth Amateur Paleontologists Society (MAPS).

Primary reference: W. J. Kennedy and W. A. Cobban. 1994. Upper Campanian ammonites from the Mount Laurel Sand at Biggs Farm, Delaware. Journal of Paleontology 68(6):1285-1305 [A. Hendy/A. Hendy]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 83133: authorized by Austin Hendy, entered by Austin Hendy on 07.08.2008, edited by Matthew Clapham

Creative Commons license: CC BY (attribution)