Sharp Valley [Kotick Point Fm] (Cretaceous of Antarctica)

Where: Antarctica (64.2° S, 57.8° W: paleocoordinates 67.5° S, 48.4° W)

• coordinate stated in text

• local area-level geographic resolution

When: Whisky Bay Formation, Albian (113.0 - 100.5 Ma)

• STRATIGRAPHIC RELATIONS: From the Kotick Point Fm, which is regionally overlain by the Whisky Bay Fm (Albian-Coniacian). AGE: Aptian-Albian, on the basis of ammonite biostratigraphy; here placed in the Albian on the basis of stratigraphic position. STRATIGRAPHIC POSITION: From beds throughout the section.

• group of beds-level stratigraphic resolution

Environment/lithology: offshore; lithified siltstone

• ENVIRONMENT: Offshore siliciclastic marine setting.
• SPECIFIC LITHOLOGY: Dominated by siltstone or shale, based on Figure 6 of Ineson et al. (1986). LITHIFICATION: Assumed to be lithified.

Size class: macrofossils

Preservation: cast, mold/impression

Collection methods: COLLECTOR: Multiple collectors, including J.A. Crame and M.R.A Thompson. REPOSITORY: Not stated, but presumably British Antarctic Survey and Oxford University Museum (OUM).

Primary reference: J. R. Ineson, J. A. Crame, and M. R. A. Thomson. 1986. Lithostratigraphy of the Cretaceous strata of west James Ross Island, Antarctica. Cretaceous Research 7:141-159 [A. Hendy/A. Hendy]more details

Purpose of describing collection: biostratigraphic analysis

PaleoDB collection 83358: authorized by Austin Hendy, entered by Austin Hendy on 19.08.2008

Creative Commons license: CC BY (attribution)

Taxonomic list

• COVERAGE: Not exhaustive but inclusive of representative and biostratigraphically important ammonoidea, bivalvia, and other taxa. Other taxa may be present, but were not listed in present biostratigraphic treatment. NOMENCLATURE: Not an authoritative publication, but with fairly modern nomenclature and species-resolution identifications where listed.
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Cephalopoda
 Ammonitida - Oppeliidae
Aconeceratinae indet.
Aconeceratinae indet. Spath 1923 ammonite
Listed as "aconeceratid"
 Ammonitida - Acrioceratidae
Helicancylus patagonicum
 Ammonitida - Ancyloceratidae
Ancyloceratidae indet.
Ancyloceratidae indet. Gill 1871 ammonite
 Phylloceratida - Phylloceratidae
Phyllopachyceras sp.
Phyllopachyceras sp. Spath 1925 ammonite
 Belemnitida - Dimitobelidae
"Dimitobelus stimulus" = Dimitobelus (Dimitobelus) stimulus
"Dimitobelus stimulus" = Dimitobelus (Dimitobelus) stimulus Whitehouse 1924 belemnite
Bivalvia
 Pectinida - Entoliidae
Entolium sp.
Entolium sp. Meek 1865 scallop
 Pectinida - Buchiidae
Aucellina sp.
Aucellina sp. Pompeckj 1901 scallop
 Myalinida - Inoceramidae
Inoceramus sp.
Inoceramus sp. Sowerby 1814 clam