Loc. 226, 226-1, 227, Punta Dreadnought [upper Santa Marta Fm] (Cretaceous of Antarctica)

Where: Antarctica (64.2° S, 57.8° W: paleocoordinates 62.0° S, 68.4° W)

• coordinate estimated from map

• outcrop-level geographic resolution

When: Santa Marta Formation, Campanian (83.6 - 72.1 Ma)

• STRATIGRAPHIC RELATIONS: From the Santa Marta Fm, which regionally overlies the Hidden Lake Fm (Coniacian), and is overlain by the López de Bertodano Fm (Campanian-Maastrichtian). AGE: Campanian, on the basis of ammonite biostratigraphy. STRATIGRAPHIC POSITION: From the upper part of the local section.

• group of beds-level stratigraphic resolution

Environment/lithology: coastal; lithified siltstone

• ENVIRONMENT: Shallow siliciclastic marine setting.
• SPECIFIC LITHOLOGY: Predominantly siltstone, based on Fig. 4 of Strelin et al. (1992). LITHIFICATION: Lithified, on the basis of figured specimens.

Size class: macrofossils

Preservation: cast, mold/impression

Collected by Strelin

Collection methods: surface (in situ),

• COLLECTOR: J. Strelin, R. A. Scasso, and E. B. Olivero. REPOSITORY: Centro de Investigaciones en Recurso Geologicos (CIRGEO).

Primary reference: J. Strelin, R. A. Scasso, and E. B. Olivero. 1992. Nuevos afloramientos de la Formacion Santa Marta (Cretacio Tardio), en las Isla James Ross, Antartida. Estratigrafia e implcancias estructurales. Geologia de la Isla James Ross 201-237 [A. Hendy/A. Hendy]more details

Purpose of describing collection: biostratigraphic analysis

PaleoDB collection 83565: authorized by Austin Hendy, entered by Austin Hendy on 22.08.2008

Creative Commons license: CC BY (attribution)

Taxonomic list

• COVERAGE: Exhaustive for ammonoidea. Other taxa may be present, but were not listed in present biostratigraphic treatment. NOMENCLATURE: Not an authoritative publication, but with fairly modern nomenclature. Occurrences lack species-resolution identifications.
Show authors, comments, and common names
Cephalopoda
 Ammonitida - Tetragonitidae
Gaudryceras sp.
Gaudryceras sp. de Grossouvre 1894 ammonite
 Ammonitida - Pachydiscidae
"Anapachydiscus sp." = Menuites
"Anapachydiscus sp." = Menuites Spath 1922 ammonite
Gastropoda
 Neogastropoda - Fasciolariidae
Taioma sp.
Taioma sp. Finlay and Marwick 1937 snail
 Sorbeoconcha - Naticidae
Eunaticina sp.
Eunaticina sp. Fischer 1885 moon snail
Bivalvia
 Arcida - Cucullaeidae
Cucullaea sp.
Cucullaea sp. Lamarck 1801 clam
 Carditida - Astartidae
Eriphyla sp.
Eriphyla sp. Gabb 1864 clam
 Nuculida - Nuculidae
"Nucula (Leionucula) sp." = Leionucula
"Nucula (Leionucula) sp." = Leionucula Quenstedt 1930 nut clam