Areyonga Creek, Gardiner Range [Horn Valley Siltstone] (Ordovician of Australia)

Also known as RSN 87-2020F; Loc. 5 of Young (1997)

Where: Northern Territory, Australia (23.8° S, 131.8° E: paleocoordinates 15.8° N, 169.2° E)

• coordinate based on nearby landmark

• outcrop-level geographic resolution

When: Oepikodus communis conodont zone, Horn Valley Siltstone Formation, Bendigonian (476.8 - 473.9 Ma)

• STRATIGRAPHIC RELATIONS: From the Horn Valley Siltstone, which overlies the Pacoota Sandstone (Tremadoc), and is overlain by the Stairway Sandstone (Llanvirn). AGE: Early Arenig or Bendigonian, on the basis of conodont biostratigraphy. STRATIGRAPHIC POSITION: Basal member of the Horn Valley Siltstone

• bed-level stratigraphic resolution

Environment/lithology: marine; lithified, glauconitic dolomite

• SPECIFIC LITHOLOGY: Glauconitic dolomite. LITHIFICATION: Lithified, on the basis of facies description.

Size class: macrofossils

Collected by Young

Collection methods: bulk, chemical, sieve,

• COLLECTOR: G. C. Young, 1980's. REPOSITORY: Commonwealth Palaeontological Collection, AGSO, Canberra, Australia.

Primary reference: G. C. Young. 1997. Ordovician Microvertebrate Remains from the Amadeus Basin, Central Australia. Journal of Vertebrate Paleontology 17(1):1-25 [A. Hendy/A. Hendy]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 90417: authorized by Austin Hendy, entered by Austin Hendy on 19.07.2009

Creative Commons license: CC BY (attribution)

Taxonomic list

• COVERAGE: Limited to vertebrate taxa described in text. NOMENCLATURE: Authoritative publication with modern nomenclature and genus and species-resolution identifications where possible.
Pteraspidomorphi
 Arandaspidida - Arandaspididae
Porophoraspis sp. Ritchie and Gilbert-Tomlinson 1977 jawless fish