Sta. 12011 - Johns Island [Hawthorn Fm] (Miocene of the United States)

Where: Charleston County, South Carolina (32.7° N, 80.0° W: paleocoordinates 33.0° N, 75.9° W)

• coordinate based on nearby landmark

• outcrop-level geographic resolution

When: Hawthorn Formation, Early/Lower Miocene (23.0 - 16.0 Ma)

• STRATIGRAPHIC RELATIONS: From the Hawthorn Fm, which presumably regionally unconformably overlies Eocene units, and is regionally unconformaly overlain by the Rayso Marl. AGE: Early Miocene. STRATIGRAPHIC POSITION: From unknown position within formation.

• group of beds-level stratigraphic resolution

Environment/lithology: coastal; lithified marl

• ENVIRONMENT: Shallow marine, shelfal siliciclastic.
• SPECIFIC LITHOLOGY: Marl. LITHIFICATION: Lithified, on the basis of facies description.

Size class: macrofossils

Collected by Cooke in 1929

Collection methods: surface (in situ),

• COLLECTORS: C.W. Cooke, 1929. REPOSITORIES: Unknown.

Primary reference: C. W. Cooke. 1936. Geology of the Coastal Plain of South Carolina. United States Geological Survey Bulletin 837 [A. Hendy/A. Hendy]more details

Purpose of describing collection: biostratigraphic analysis

PaleoDB collection 92431: authorized by Austin Hendy, entered by Austin Hendy on 12.11.2009

Creative Commons license: CC BY (attribution)

Taxonomic list

• COVERAGE: Exhaustive for bivalves and gastropods. NOMENCLATURE: Identified by W.C. Mansfield; not an authoritative publication and with antiquated nomenclature but with species-resolution identifications. Nomenclature updated with subsequent publications.
Show authors, comments, and common names
Gastropoda
 Neogastropoda - Marginellidae
Marginella sp.
Marginella sp. Lamarck 1799 margin shell
Bivalvia
 Nuculanida - Nuculanidae
"Leda aff. flexuosa" = Nuculana
"Leda aff. flexuosa" = Nuculana pointed nut clam
 Pectinida - Pectinoidae
Pecten sp.
Pecten sp. Müller 1776 scallop
 Cardiida - Veneridae
"Antigona (Artena) undulata" = Artena
"Antigona (Artena) undulata" = Artena venus clam
 Carditida - Carditidae
"Venericardia granulata" = Cyclocardia granulata
"Venericardia granulata" = Cyclocardia granulata Say 1824 clam