'Striispirifer'-Spirinella Community, Yarralumla Fm., Yarralumla brickworks: Gorstian, Australia
List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
|
Crinoidea
- Pisocrinida
- Pisocrinidae
|
||||||||||
|
Pisocrinus australis
|
||||||||||
|
Gastropoda
|
||||||||||
|
Gastropoda indet.
Cuvier 1795
|
||||||||||
|
Cephalopoda
|
||||||||||
|
Nautiloidea indet.
Agassiz 1847
|
||||||||||
| conical | ||||||||||
|
unclassified
|
||||||||||
|
Bryozoa indet.
Ehrenberg 1831
|
||||||||||
| ramose | ||||||||||
|
Rhynchonellata
- Orthida
- Draboviidae
|
||||||||||
|
Salopina mediocostata
|
||||||||||
|
Rhynchonellata
- Atrypida
- Septatrypidae
|
||||||||||
|
Atrypoidea australis
(Dun 1904)
|
||||||||||
|
Rhynchonellata
- Atrypida
- Atrypidae
|
||||||||||
|
Atrypa cf. dzwinogrodensis
|
||||||||||
|
Rhynchonellata
- Athyridida
- Retziellidae
|
||||||||||
|
Retziella capricornae
|
||||||||||
|
Rhynchonellata
- Spiriferida
- Reticulariidae
|
||||||||||
|
Spirinella caecistriata
Johnston 1941
|
||||||||||
|
Rhynchonellata
- Spiriferida
- Delthyrididae
|
||||||||||
|
Howellella nucula
|
||||||||||
| "Howellella nucula (& 'Striispirifer'?)" | ||||||||||
|
Rhynchonellata
- Spiriferida
- Cyrtiidae
|
||||||||||
|
? Striispirifer sp.
Cooper and Muir-Wood 1951
|
||||||||||
| "Howellella nucula (& 'Striispirifer'?)" | ||||||||||
|
Strophomenata
- Strophomenida
- Aegiromenidae
|
||||||||||
|
Aegiria (Epelidoaegiria) ? chilidifera
Strusz 1982
|
||||||||||
| recombined as Epelidoaegiria minuta chilidifera | ||||||||||
|
Strophomenata
- Strophomenida
- Strophochonetidae
|
||||||||||
|
Protochonetes cf. minimus
(Sowerby 1839)
|
||||||||||
|
Strophomenata
- Strophomenida
- Leptostrophiidae
|
||||||||||
|
Leptostrophia (Mitchellella) quadrata
|
||||||||||
|
Ostracoda
|
||||||||||
|
Ostracoda indet.
Latreille 1802
|
||||||||||
|
Trilobita
- Odontopleurida
|
||||||||||
|
? Odontopleurida indet.
Whittington 1959
|
||||||||||
|
Trilobita
- Proetida
- Otarionidae
|
||||||||||
|
? Otarion sp.
Zenker 1833
|
||||||||||
|
Trilobita
- Phacopida
- Encrinuridae
|
||||||||||
|
Pacificurus spp.
|
||||||||||
| synonym of Batocara | ||||||||||
|
Trilobita
- Ptychopariida
|
||||||||||
|
? Proetacea indet.
Corda 1847
|
||||||||||
|
Anthozoa
- Auloporida
- Auloporidae
|
||||||||||
|
? Aulopora sp.
Goldfuss 1829
|
||||||||||
|
Anthozoa
- Favositida
- Favositidae
|
||||||||||
|
Favosites sp.
Lamarck 1816
|
||||||||||
|
Anthozoa
- Rugosa
|
||||||||||
|
Rugosa indet.
Milne-Edwards and Haime 1850
|
||||||||||
|
Anthozoa
- Stauriida
- Lykophyllidae
|
||||||||||
|
Phaulactis sp.
Ryder 1926
|
||||||||||
| see common names | ||||||||||
Geography
| Country: | Australia | State/province: | Australian Capital Territory |
| Coordinates: | 35.3° South, 149.1° East (view map) | ||
| Paleocoordinates: | 2.0° North, 175.8° East | ||
| Basis of coordinate: | based on political unit | ||
| 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: | Yarralumla | ||||
| Stratigraphic resolution: | formation | ||||
| Stratigraphy comments: Age of community given as Late Wenlockian? to Early Ludlovian. Correlation chart gives lowermost Gorstian for Cliftonwood Limestone (PBDB coll. 25680), with which this formation is said to be coeval. | |||||
Lithology and environment
| Primary lithology: | volcaniclastic mudstone |
| Includes fossils? | Y |
| Lithology description: See geology. | |
| Environment: | marine indet. |
| Geology comments: "As interpreted by Link (1971), the clastic 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 14.9, with abundances. Yarralumla Formation only, several localities within old Yarralumla brickpits combined. | |
Metadata
| Database number: | 25682 | ||
| Authorizer: | M. Foote | Enterer: | M. Foote |
| Modifier: | M. Uhen | Research group: | marine invertebrate |
| Created: | 2002-09-20 09:14:20 | Last modified: | 2018-11-18 11:08:40 |
| Access level: | the public | Released: | 2002-09-20 09:14:20 |
| 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] |