'Striispirifer'-Spirinella Community, Cliftonwood Limestone, near Yass: Gorstian, Australia

List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
Anthozoa - Heliolitida - Heliolitidae
Heliolites sp. Dana 1846
Anthozoa - Favositida - Favositidae
? Favosites sp. Lamarck 1816
Anthozoa - Rugosa
Rugosa indet. Milne-Edwards and Haime 1850
Anthozoa - Cystiphyllida - Tryplasmatidae
Tryplasma derrengullenense
Anthozoa - Cystiphyllida - Goniophyllidae
Rhizophyllum cf. interpunctatum
Inarticulata - Inarticulata
informal Inarticulata indet. Huxley 1869
inarticulate brachiopods indet.
Rhynchonellata - Athyridida - Anoplothecidae
Coelospira cavata
Rhynchonellata - Spiriferida - Reticulariidae
Spirinella caecistriata Johnston 1941
Rhynchonellata - Spiriferida - Cyrtiidae
Striispirifer sp. Cooper and Muir-Wood 1951
genus name in quotes
Rhynchonellata - Orthida - Draboviidae
Salopina aff. mediocostata
Rhynchonellata - Atrypida - Septatrypidae
Atrypoidea australis (Dun 1904)
Rhynchonellata - Atrypida - Atrypidae
Atrypa cf. dzwinogrodensis
Rhynchonellata - Atrypida - Atrypinidae
Spirigerina marginalis (Dalman 1828)
? Atrypina sp. Hall and Clarke 1893
Strophomenata - Orthotetida - Chilidiopsidae
Morinorhynchus shearsbyi
Strophomenata - Strophomenida - Aegiromenidae
Aegiria (Epelidoaegiria) chilidifera Strusz 1982
Gastropoda
Gastropoda indet. Cuvier 1795
Ostracoda - Cypridinida - Bolbozoidae
Bolbozoe sp. Barrande 1872
Trilobita - Phacopida - Encrinuridae
Pacificurus sp.
Trilobita - Proetida - Proetidae
Prantlia cf. yassensis (Etheridge and Mitchell 1892)
Trilobita - Proetida - Otarionidae
Otarion sp. Zenker 1833
Crinoidea - Pisocrinida - Pisocrinidae
Pisocrinus australis
see common names

Geography
Country:Australia State/province:Australian Capital Territory
Coordinates: 35.0° South, 149.0° East (view map)
Paleocoordinates:2.2° North, 175.5° East
Basis of coordinate:based on nearby landmark
Geographic resolution:local area
Time
Period: Silurian Epoch: Ludlow
Stage: Gorstian 10 m.y. bin: Silurian 2
*Epoch:Early/Lower Ludlow
*International age/stage:Early/Lower Gorstian
Key time interval: Gorstian
Age range of interval: 427.4 - 425.6 m.y. ago
* legacy (obsolete) database fields
Stratigraphy
Formation:Yass Member:Cliftonwood Limestone
Stratigraphic resolution:member
Stratigraphy comments: Age of community given as Late Wenlockian? to Early Ludlovian. Correlation chart gives lowermost Gorstian for this member.
Lithology and environment
Primary lithology: silty "limestone"
Secondary lithology:gray,red or brown calcareous mudstone
Includes fossils?Y
Lithology description: "In this section...the most abundant shelly fossils are in a thin layer of grey brown, calcareous mudstone just above a 60 cm thick silty limestone."
Environment:marine indet.
Geology comments: "As interpreted by Link (1971), the clastid sediments of the Cliftonwood Lst were deposited in a quiet transgression and were high subtidal to locally intertidal. The lower, sandier part of his Yass Subgroup has common ripple marked and occasional raindrop? marked bedding surfaces...Mud cracks filled with fine sand are not uncommon in the lower beds. Fossils are usually scattered...brachiopods commonly articulated...some evidence of bioturbation. The overall aspect of the fauna suggests assignment to BA 3. In the Canberra area, wehre the Yarralumla Form. is muddier and more obviously volcanogenic and local relief was probably greater, some occurrences may be deeper, but this has yet to be established."
Taphonomy
Modes of preservation:body
Size of fossils:macrofossils
Collection methods and comments
Reason for describing collection:paleoecologic analysis
Collection method comments: Taxa listed in table 14.6, with abundances. Cliftonwood Lst only.
Metadata
Database number:25680
Authorizer:M. Foote Enterer:M. Foote
Modifier:M. Uhen Research group:marine invertebrate
Created:2002-09-20 09:05:06 Last modified:2018-11-18 11:07:31
Access level:the public Released:2002-09-20 09:05:06
Creative Commons license:CC BY
Reference information

Primary reference:
7152. 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]