Where: Antarctica (84.3° S, 164.1° E)
• Paleocoordinates: 70.8° S, 31.8° E (Wright 2013)
• coordinate estimated from map
• outcrop-level geographic resolution
When: Upper Member (Fremouw Formation), Anisian (246.7 - 241.5 Ma)
• Correlated to the Cynognathus Assemblage Zone Subzone C of southern Africa, and thus Anisian in age. Fauna occurs at the base of the "upper" member of the Fremouw Formation
• member-level stratigraphic resolution
Environment/lithology: "channel"; lithified, quartzose, intraclastic, silty conglomerate
•Sidor et al. 2008 says "Most of the clasts in the conglomerate are rounded and are made up of greenish-gray siltstone that is lithologically the same as a siltstone that underlies the bone bed. The elongate clasts in the conglomerate exhibit no preferred orientation; however, the underlying sandstones indicate a general northwest paleocurrent. The clasts range in diameter from 5 mm to about 60 cm, with an average size of 5–10 cm. The conglomerate has a matrix of medium-grained, quartz-rich sand, similar to un- derlying channel sands. The fact that the conglomerate is domi- nated by intraclasts that were derived from underlying siltstones indicates that the transporting flow was carrying locally eroded material that was transported a relatively short distance. The nature of the unit suggests rapid deposition from a large flow of relatively high viscosity and moderate to lower velocity (Krissek et al., 1991). "
Size class: macrofossils
Collected by Hammer in 1985-86; reposited in the AMNH
Collection methods: surface (in situ),
Primary reference: C. A. Sidor, R. Damiani, and W. R. Hammer. 2008. A new Triassic temnospondyl from Antarctica and a review of Fremouw Formation biostratigraphy. Journal of Vertebrate Paleontology 28(3):656-663 [C. Sidor/B. Peecook]more details
Purpose of describing collection: taxonomic analysis
PaleoDB collection 105296: authorized by Richard Butler, entered by Richard Butler on 18.02.2011, edited by Chris Sidor and Emma Dunne
Creative Commons license: CC0 (CC0)
Taxonomic list
| Amphibia | |
|
| |
|
| |
| Osteichthyes | |
|
| |
|
Cynognathidae indet.2 cynodont AMNH 24407, partial dentary; AMNH 24406, jaw fragment; AMNH 24423, partial right mandible
| |
|
Kannemeyeriiformes indet.5 Huene 1948 dicynodont AMNH FARB 24412 (maxillary tooth root including a small portion of maxillary bone) and LACM-DI 160748 (Smith et al. 2020 also describe AMNH 24403)
| |