Eocene Erratics: Mt. Discovery, McMurdo Sound (Eocene of Antarctica)

Where: Antarctica (78.4° S, 165.0° E: paleocoordinates 78.9° S, 157.3° E)

• coordinate based on nearby landmark

When: Late/Upper Eocene (37.2 - 33.9 Ma)

• Bartonian to Early Priabonian

Environment/lithology: marine

• Inferences of shallow, warm water conditions.
• Isolated erratics of arkosic grits derived from weathering and erosion of ancient granitic and gabbroic rocks. Medium to light grey-brown, poorly sorted, moderately indurated, arkosic grits.

Size class: macrofossils

Preservation: original calcite

Collection methods: All collections made by Jeffrey D. Stilwell and party, University of Nebraska-Lincoln Expeditions (1993-1995).

Primary reference: J. S. Buckeridge. 2000. A new species of Austrobalanus (Cirripedia, Thoracia) from Eocene erratics, Mount Discovery, McMurdo Sound, East Antarctica. Antarctic Research Series 76:329-333 [L. Ivany/C. Visaggi/C. Visaggi]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 43030: authorized by Linda Ivany, entered by Christy Visaggi on 09.08.2004, edited by Mark Uhen

Creative Commons license: CC BY (attribution)

Taxonomic list

• Reported mollusks, dinoflagellates, and pollen are not included in the taxonomic list.
Malacostraca
 Decapoda - Callianassidae
Callianassa symmetricus n. sp.1 decapod
Maxillopoda
  -
Bivalvia
 Cardiida - Veneridae
"Eurhomalea" claudiae4 venus clam
found in boulder E312
Gastropoda
  -
Gastropoda indet.4 Cuvier 1797 snail
found in boulder E312
Chondrichthyes
 Lamniformes - Mitsukurinidae
"Carcharias cf. macrota" = Striatolamia macrota3
"Carcharias cf. macrota" = Striatolamia macrota3 Agassiz 1843 goblin shark
Site T, E145, Site J. E151
 Carchariniformes - Triakidae
Galeorhinus sp.3 de Blainville and Prévost 1816 school shark
Site T, E145
Actinopteri
 Gadiformes - Gadidae
Gadidae indet.3 Rafinesque 1810
Site T, E372
Aves
 Ornithurae - Pelagornithidae
Pelagornithidae indet.2 Fürbringer 1888 bird
found in boulder A303
Reptilia
 Loricata -
"Crocodilia indet." = Crocodylia4
"Crocodilia indet." = Crocodylia4 Owen 1842 crocodilian
found in boulder E312