Mount King, Locality B (Permian of Antarctica)

Also known as Locality B, Mount King, Alexander Island, Antarctica

Where: Antarctica (69.9° S, 69.4° W: paleocoordinates 64.3° S, 100.1° W)

• coordinate stated in text

• outcrop-level geographic resolution

When: Mount King Formation (LeMay Group), Sakmarian (295.5 - 290.1 Ma)

• The position of the mount King beds within a higher lithostratigraphic framework is uncertain at present. The may be assigned to the LeMay Group (Burn 1984) of Alexander Island or to the Trinity Peninsula Group (Aide 1957) of the Antarctic Peninsula, or perhaps represent a completely new lithostratigraphical unit. However, there are problems with each of these alternatives. Listed as possibly Gzhelian-Artinskian in paper, but Costatumulus is a Sakmarian genus in Argentina.

• group of beds-level stratigraphic resolution

Environment/lithology: marine; lithified, bioturbated, sandy mudstone and lithified, conglomeratic sandstone

• About 10 m of sedimentary rocks, mainly m udstones, are exposed dipping 20 degrees due north. The upper part is more sandy, containing clean, arkosic, sharp-based sandstones up to 50 cm thick with locally matrix-supported conglomeratic bases. The lower part contains sandy mudstones, some of which are massive, whereas others show graded units up to 40 cm in thickness; higher levels are composed of alternating muddy sandstone and mudstone. Load structures are present and there is much synsedimentary slumping. Near the base of the section there is a single 3 cm brachiopod shell bed containing linoproductids. Bioturbation is present as Planolites (KG.4649.10) and Zoophycos-type burrows (KG.4649.6) in the coarse sediments.

Size class: macrofossils

Collection methods: All specimens collected in this study are housed at the British Antarctic Survey palaeontological collections in Cambridge

Primary reference: S. R. A. Kelly, P. A. Doubleday, C. H. C. Brunton, J. M. Dickins, G. D. Sevastopulo and P. D. Taylor. 2001. First Carboniferous and ?Permian marine macrofaunas from Antarctica and their tectonic implications. Journal of the Geological Society of London 158(2):219-232 [J. Alroy/C. Simpson/C. Simpson]more details

Purpose of describing collection: general faunal/floral analysis

PaleoDB collection 41804: authorized by John Alroy, entered by Carl Simpson on 20.07.2004, edited by Matthew Clapham

Creative Commons license: CC BY (attribution)

Taxonomic list

Strophomenata
 Productida - Monticuliferidae
cf. Costatumulus sp. Waterhouse 1983
Rhynchonellata
 Spiriferida - Ambocoeliidae
cf. Crurithyris sp. George 1931
Lingulata
 Lingulida - Lingulidae