Hexriver Formation (2nd Sandstone), Warmwaterberg (Devonian of South Africa)

Where: South Africa (33.8° S, 20.9° E: paleocoordinates 64.2° S, 156.2° W)

• coordinate stated in text

• local area-level geographic resolution

When: Hexriver Formation (Bokkeveld Group), Eifelian (393.3 - 387.7 Ma)

• Age call from ref. 9618.

• formation-level stratigraphic resolution

Environment/lithology: marine; fine-grained, medium, intraclastic sandstone

• Ref. 9618 gives interpretation of Bokkeveld Group as a series of shallowing-upward packages, with argillaceous unit below and arenaceous unit above. The shallowing upward sequence is interpreted as representing environments from the shelf up to deltaic systems. Most fossils come from lower mudstones, often in lenses.
• Ref. 9616 refers only to "sandstone". Ref. 9617, for formation as a whole, cites "Sandstone, fine- to medium- grained, thin- to thick-bedded, medium scale planar and trough cross-bedded, thiin intraclast lenses"

Primary reference: R. D. F. Oosthuizen. 1984. Preliminary catalogue and report on the biostratigraphy and palaeogeographic distribution of the Bokkeveld fauna. Transactions of the Geological Society of South Africa 87:125-140 [M. Foote/M. Foote/M. Foote]more details

Purpose of describing collection: biostratigraphic analysis

PaleoDB collection 35601: authorized by Michael Foote, entered by Michael Foote on 30.12.2003

Creative Commons license: CC BY (attribution)

Taxonomic list

Show authors, comments, and common names
Rhynchonellata
 Terebratulida - Meganterididae
Mutationella "sp. (a)"
Lophophorata
 Tentaculitida - Tentaculitidae
Tentaculites "sp. (c)"
Tentaculites "sp. (c)" von Schlotheim 1820
Trilobita
 Phacopida - Calmoniidae
? Phacopina lakei
Crinoidea
  -
Crinoidea indet.
Crinoidea indet. Miller 1821 Sea lily