W 94-34, Seymour Island (Eocene of Antarctica)

Where: Antarctica (64.2° S, 56.7° W: paleocoordinates 63.4° S, 63.8° W)

• coordinate based on nearby landmark

• outcrop-level geographic resolution

When: La Meseta Formation, Ypresian (56.0 - 47.8 Ma)

• Location places it in possibly in upper Telm3, perhaps in lower Telm4-Telm5.

• group of beds-level stratigraphic resolution

Environment/lithology: delta front; sandstone

• According to Stillwell & Zinsmeister (1992): "Abundant shell beds and lenses, cross-bedding, and an abundance of wood in Telm3 are characteristic of a nearshore, high-energy environment, in which wave and tidal currents exert strong influences. Shell-rich channel fillings, which form a composite fill above an erosional surface, are common, as are laterally persistent venerid shell beds. The fill was emplaced in several stages, as indicated by burrowed horizons and internal lag deposits (Sadler, 1988)." It could be a shoreface, but the presence of slumps in underlying Telm2 is most consistent with a delta setting, in which Telm3 could therefore represent wave and tide-influenced mouth bar deposits in the upper delta front.
• Slump blocks in channel sands

Size class: macrofossils

Primary reference: D. B. Blake and R. B. Aronson. 1998. Eocene stelleroids (Echinodermata) at Seymour Island, Antarctic Peninsula. Journal of Paleontology 72(2):339-353 [L. Ivany/E. Kowalski/L. Villier]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 203500: authorized by Matthew Clapham, entered by Matthew Clapham on 17.08.2019

Creative Commons license: CC BY (attribution)

Taxonomic list

Show authors, comments, and common names
Asteroidea
 Forcipulatida - Zoroasteridae
Zoroaster aff. fulgens
Zoroaster aff. fulgens Thomson 1873 sea star