Odontochile Community, Rainbow Hill Member, Yass Syncline (Silurian of Australia)

Where: Australian Capital Territory, Australia (34.8° S, 148.9° E: paleocoordinates 0.0° N, 175.7° E)

• coordinate based on political unit

• local area-level geographic resolution

When: Rainbow Hill Marl Member (Rosebank Shale Formation), Ludfordian (425.6 - 423.0 Ma)

• member-level stratigraphic resolution

Environment/lithology: marine; bioturbated, calcareous siltstone and bioturbated, silty marl

• See lithology. "Link (1971) [suggested] deposition in quiet water below wave base, probably in conditions similar to thos for the earlier Yarwood Siltstone...BA 4."
• "...the Rainbow Hill Marl represents one of the minor regressive intervals in a generally transgressive sequence which extends from the Silverdale Formation to the Elmside Formation. Strictly speaking, with no more than27% carbone, it is a calcareous siltstone which is massive, richly fossiliferous in places, and strongly bioturbated. Most trilobites and brachiopods are incomplete...More than half the shell and trilobite fragments lie parallelto bedding...The terrigenous component is volcanogenic, the carbonte bioclastic. Immediately below the horizon (which is generally 2-5 m thick) are dark brown and grey shales with abundant graptolites, and above are greenish gray to balck sily mudstone and siltstone with occasional graptolites and rare, small brachiopods...suggested lag deposits..."

Size class: macrofossils

Collection methods: List based only on material reported from Rainbow Hill Member.

Primary reference: D. L. Strusz and M. J. Garratt. 1999. Australian communities. In A. J. Boucot, J. D. Lawson (eds.), Paleocommunities - a case study from the Silurian and Lower Devonian 177-199 [M. Foote/M. Foote/P. Wagner]more details

Purpose of describing collection: paleoecologic analysis

PaleoDB collection 25677: authorized by Michael Foote, entered by Michael Foote on 20.09.2002

Creative Commons license: CC BY (attribution)

Taxonomic list

• "Tabulate corals and bryozoans appear to be absent, as do conodonts."
Show authors, comments, and common names
Anthozoa
 Stauriida - Streptelasmatidae
Palaeocyathus australe
Strophomenata
 Strophomenida - Sowerbyellidae
Plectodonta davidi
 Strophomenida -
Strophochonetes sp.
Strophochonetes sp. Muir-Wood 1962
 Strophomenida - Rafinesquinidae
Leptaena sp.
Leptaena sp. Dalman 1828
 Orthotetida - Chilidiopsidae
Morinorhynchus sp.
Morinorhynchus sp. Havlicek 1965
Rhynchonellata
 Orthida - Dalmanellidae
"Isorthis (? Tyersella) sp." = Tyersella
"Isorthis (? Tyersella) sp." = Tyersella
"Isorthis [probably I. (Tyersella)]"
 Orthida - Draboviidae
Salopina sp.
Salopina sp. Boucot 1960
 Athyridida - Nucleospiridae
Nucleospira australis
 Atrypida - Atrypinidae
Spirigerina marginalis
Trilobita
 Proetida - Proetidae
"Proetus bowningensis" = Latiproetus bowningensis
"Proetus bowningensis" = Latiproetus bowningensis Mitchell 1887 trilobite
 Proetida - Otarionidae
Otarion bowningensis
 Phacopida - Phacopidae
Ananaspis latigenalis
 Phacopida - Dalmanitidae
Odontochile meridianus
 Phacopida - Cheiruridae
Crotalocephalus silverdalensis
 Phacopida - Calymenidae
Sthenarocalymene australis
 Odontopleurida - Odontopleuridae
Ceratocephala impedita, Leonaspis rattei
Ceratocephala impedita Etheridge and Mitchell 1896 trilobite
Leonaspis rattei Etheridge and Mitchell 1896 trilobite