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Westfield Sandstone, Tasmania, Australia

Formation	Westfield Sandstone
Age:	443 - 441 Ma Silurian
Interval	Ashgill
Lithology	sandstone/siltstone, sandstone, siltstone
Number of Collections	10
Number of Occurrences	70

Recorded Sample Locations

Location	Region	Stratigraphic Name
Top of Benjamin Limestone	Derwent Valley municipality, Tasmania, Australia	Westfield Sandstone
Westfield Road Section. 1250 meters.	Central Highlands municipality, Tasmania, Australia	Westfield Sandstone

Associated Units

Stratigraphic Name	Age	Lithology	Occurrence Records
Benjamin Limestone	452 - 450 Ma Late/Upper Ordovician	limestone	15
Gordon - Benjamin - Upper Limestone	453 - 445 Ma Late/Upper Ordovician	limestone	4

Recorded Fossils

Accepted Name	Type	Hierarchy	Age
Guandacolithus sp. genus	6	Animalia : Arthropoda : Trilobita : Asaphida : Trinucleidae : *Guandacolithus*	449.5 - 443.7 Ma Paleozoic
Bumastoides sp. genus	6	Animalia : Arthropoda : Trilobita : Corynexochida : Illaenidae : *Bumastoides*	443.4 - 440.8 Ma Silurian
Bumastus sp. genus	6	Animalia : Arthropoda : Trilobita : Corynexochida : Illaenidae : *Bumastus*	449.5 - 443.7 Ma Paleozoic
Eokosovopeltis sp. genus	6	Animalia : Arthropoda : Trilobita : Corynexochida : Styginidae : *Eokosovopeltis*	443.4 - 440.8 Ma Silurian
Calymene sp. genus	6	Animalia : Arthropoda : Trilobita : Phacopida : Calymenidae : *Calymene*	449.5 - 443.7 Ma Paleozoic
Flexicalymene sp. genus	6	Animalia : Arthropoda : Trilobita : Phacopida : Calymenidae : *Flexicalymene*	449.5 - 443.7 Ma Paleozoic
Gravicalymene sp. genus	6	Animalia : Arthropoda : Trilobita : Phacopida : Calymenidae : *Gravicalymene*	443.4 - 440.8 Ma Silurian
Cromus sp. genus	6	Animalia : Arthropoda : Trilobita : Phacopida : Encrinuridae : *Cromus*	443.4 - 440.8 Ma Silurian
Encrinurus sp. genus	6	Animalia : Arthropoda : Trilobita : Phacopida : Encrinuridae : *Encrinurus*	443.4 - 440.8 Ma Silurian
Brongniartella sp. genus	6	Animalia : Arthropoda : Trilobita : Phacopida : Homalonotidae : *Brongniartella*	443.4 - 440.8 Ma Silurian
Cryptospira intraplicata species	7	Animalia : Brachiopoda : Rhynchonellata : Atrypida : Zygospiridae : Cryptospira : *Cryptospira intraplicata*	445.2 - 443.4 Ma Paleozoic
Cathaysiorthis enorme species	7	Animalia : Brachiopoda : Rhynchonellata : Orthida : Cathaysiorthidae : Cathaysiorthis : *Cathaysiorthis enorme*	445.2 - 443.4 Ma Paleozoic
Isorthis (Ovalella) sp. subgenus	6.3	Animalia : Brachiopoda : Rhynchonellata : Orthida : Dalmanellidae : Isorthis : *Isorthis (Ovalella)*	449.5 - 443.7 Ma Paleozoic
Isorthis (Ovalella) arndellensis species	7	Animalia : Brachiopoda : Rhynchonellata : Orthida : Dalmanellidae : Isorthis : *Isorthis (Ovalella) arndellensis*	445.2 - 443.4 Ma Paleozoic
Onniella sp. genus	6	Animalia : Brachiopoda : Rhynchonellata : Orthida : Dalmanellidae : *Onniella*	449.5 - 443.7 Ma Paleozoic
Onniella perplexa species	7	Animalia : Brachiopoda : Rhynchonellata : Orthida : Dalmanellidae : Onniella : *Onniella perplexa*	445.2 - 443.4 Ma Paleozoic
Hirnantia sp. genus	6	Animalia : Brachiopoda : Rhynchonellata : Orthida : Draboviidae : *Hirnantia*	449.5 - 443.7 Ma Paleozoic
Kinnella medlicotti species	7	Animalia : Brachiopoda : Rhynchonellata : Orthida : Draboviidae : Kinnella : *Kinnella medlicotti*	449.5 - 443.7 Ma Paleozoic
Dolerorthis sp. genus	6	Animalia : Brachiopoda : Rhynchonellata : Orthida : Hesperorthidae : *Dolerorthis*	449.5 - 443.7 Ma Paleozoic
Heterorthis sp. genus	6	Animalia : Brachiopoda : Rhynchonellata : Orthida : Heterorthidae : *Heterorthis*	449.5 - 443.7 Ma Paleozoic
Lepidocyclus sp. genus	6	Animalia : Brachiopoda : Rhynchonellata : Rhynchonellida : Rhynchotrematidae : *Lepidocyclus*	449.5 - 443.7 Ma Paleozoic
Eospirifer sp. genus	6	Animalia : Brachiopoda : Rhynchonellata : Spiriferida : Cyrtiidae : *Eospirifer*	443.4 - 440.8 Ma Silurian
Hedstroemina sp. genus	6	Animalia : Brachiopoda : Strophomenata : Strophomenida : Rafinesquinidae : *Hedstroemina*	443.4 - 440.8 Ma Silurian
Kiaeromena (Bekkeromena) sp. subgenus	6.3	Animalia : Brachiopoda : Strophomenata : Strophomenida : Rafinesquinidae : Kiaeromena : *Kiaeromena (Bekkeromena)*	449.5 - 443.7 Ma Paleozoic
Kjerulfina sp. genus	6	Animalia : Brachiopoda : Strophomenata : Strophomenida : Rafinesquinidae : *Kjerulfina*	449.5 - 443.7 Ma Paleozoic
Favositidae family	5	Animalia : Cnidaria : Anthozoa : Favositidae	443.4 - 440.8 Ma Silurian
Holophragma sp. genus	6	Animalia : Cnidaria : Anthozoa : Lykophyllidae : *Holophragma*	449.5 - 443.7 Ma Paleozoic
Dalmanophyllum sp. genus	6	Animalia : Cnidaria : Anthozoa : Streptelasmatidae : *Dalmanophyllum*	449.5 - 443.7 Ma Paleozoic
Tasmanoconularia sp. genus	6	Animalia : Cnidaria : Scyphozoa : *Tasmanoconularia*	449.5 - 443.7 Ma Paleozoic
Graptolithina class	3	Animalia : Hemichordata : Graptolithina	449.5 - 443.7 Ma Paleozoic
Normalograptus normalis species	7	Animalia : Hemichordata : Graptolithina : Bireclinata : Normalograptidae : Normalograptus : *Normalograptus normalis*	443.4 - 440.8 Ma Silurian
Metabolograptus persculptus species	7	Animalia : Hemichordata : Graptolithina : Bireclinata : Metabolograptus : *Metabolograptus persculptus*	443.4 - 440.8 Ma Silurian
Akidograptus sp. genus	6	Animalia : Hemichordata : Graptolithina : *Akidograptus*	443.4 - 440.8 Ma Silurian
Atavograptus sp. genus	6	Animalia : Hemichordata : Graptolithina : *Atavograptus*	443.4 - 440.8 Ma Silurian
Glossograptus sp. genus	6	Animalia : Hemichordata : Graptolithina : *Glossograptus*	449.5 - 443.7 Ma Paleozoic
Orthodesma sp. genus	6	Animalia : Mollusca : Bivalvia : Modiomorphida : Modiomorphidae : *Orthodesma*	449.5 - 443.7 Ma Paleozoic
Pterinea sp. genus	6	Animalia : Mollusca : Bivalvia : Ostreida : Pterineidae : *Pterinea*	449.5 - 443.7 Ma Paleozoic

References

Banks M. R. (1988) The base of the Silurian System in Tasmania, Bulletin of the British Museum (Natural History) (Geology Series) 43, 191-194

Laurie J. R. (1991) Articulate brachiopods from the Ordovician and Lower Silurian of Tasmania, Association of Australasian Palaeontologists Memoir 11, 1-106

Data courtesy of: PBDB: The Paleobiology Database, Creative Commons CC-BY licenced. , GBIF: the Global Biodiversity Information Facility, various licences, iDigBio, various licences, and EOL: The Encyclopedia of Life (Open Data Public Domain). Because fossils are made of minerals too!

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