ammonites
78SK35 - Unit 4 (Miocene of the United States)

Also known as B-559

Where: Calvert County, Maryland (38.4° N, 76.4° W: paleocoordinates 38.6° N, 73.3° W)

• coordinate based on nearby landmark

• outcrop-level geographic resolution

When: Drumcliff Member (Choptank Formation), Middle Miocene (16.0 - 11.6 Ma)

• STRATIGRAPHIC RELATIONS: From Drumcliff Mbr of the Choptank Fm, Chesapeake Grp. AGE: Middle Miocene. STRATIGRAPHIC POSITION: From unit 4.

• bed-level stratigraphic resolution

Environment/lithology: coastal; unlithified, fine-grained, medium, shelly/skeletal, silty sandstone

• ENVIRONMENT: Shallow marine siliciclastic.
• SPECIFIC LITHOLOGY: Silty fine-medium shelly sand. LITHIFICATION: Unlithified, based on visual inspection of collection by enterer.

Size class: macrofossils

Collected by Kidwell in 1978; reposited in the YPM

Collection methods: bulk, sieve,

• COLLECTOR: S.K. Kidwell, 1978. REPOSITORY: Peabody Museum of Natural History, Yale University.

Primary reference: S. M. Kidwell. 1982. Stratigraphy, invertebrate taphonomy and depositional history of the Miocene Calvert and Choptank Formations, Atlantic Coastal Plain. Unpublished PhD thesis, Yale University 1-511 [A. Hendy/A. Hendy/A. Hendy] more details

Purpose of describing collection: taphonomic analysis

PaleoDB collection 79114: authorized by Austin Hendy, entered by Austin Hendy on 25.02.2008

Creative Commons license: CC BY-NC-ND (attribution-noncommercial-no derivatives)