Sandwich Bluff, Cape Lamb (SBM 11) (Cretaceous of Antarctica)

Also known as Vega Island

Where: Antarctica (63.9° S, 57.6° W: paleocoordinates 62.2° S, 68.0° W)

• coordinate estimated from map

• outcrop-level geographic resolution

When: Sandwich Bluff Member (López de Bertodano Formation), Late/Upper Maastrichtian (70.6 - 66.0 Ma)

• The unit’s late Maastrichtian age is based on dinoflagellate biostratigraphy (Pirrie et al. 1991).

•Roberts et al. (2014) provided a detailed description of the sedimentology of the SBM.

•The specimen MLP 15-I-7–48 is considered to have been collected from SBM 11.

• bed-level stratigraphic resolution

Environment/lithology: offshore; lithified mudstone and sandstone

• The Sandwich Bluff Member (SBM) of the López de Bertodano Formation represents the uppermost Cretaceous unit at Cape Lamb. It overlies the upper Campanian–lower Maastrichtian Cape Lamb Member of the Snow Hill Island Formation and it underlies the Sobral? or the Hobbs Glacier Formation (Roberts et al. 2014). The SBM is a volcaniclastic unit that includes thin conglomerates, pebbly sandstones, sandstones and mudstones. Sedimentary structures include wave ripples and hummocky cross-stratification.

Size class: macrofossils

• MLP 15-I-7–48, right humerus, ulna, ulnare, intermedium, distal carpal I, distal carpal II+III, pisiform, phalanges and one rib.

Preservation: concretion

Reposited in the MLP

Collection methods: quarrying, surface (in situ), mechanical,

Primary reference: J. P. O'Gorman and R. A. Coria. 2017. A new elasmosaurid specimen from the upper Maastrichtian of Antarctica: new evidence of a monophyletic group of Weddellian elasmosaurids. Alcheringa 41(2):240-249 [E. Vlachos/F. Aspromonte]more details

Purpose of describing collection: general faunal/floral analysis

PaleoDB collection 232333: authorized by Evangelos Vlachos, entered by Franco Aspromonte on 09.11.2023

Creative Commons license: CC BY (attribution)

Taxonomic list

Show authors, comments, and common names
Reptilia
 Plesiosauria - Elasmosauridae
Weddellonectia indet.
Weddellonectia indet. O'Gorman and Coria 2017 elasmosaur
MLP 15-I-7-48, right humerus, ulna, ulnare, intermedium, distal carpal I, distal carpal II+III, pisiform, phalanges and one rib