5 Road (Ordovician to of Australia)

Where: Tasmania, Australia (42.7° S, 146.4° E: paleocoordinates 10.0° N, 166.2° W)

• coordinate estimated from map

• outcrop-level geographic resolution

When: Mt. Field Siltstone Member (Florentine Valley Limestone Formation), Lancefieldian to Lancefieldian (484.3 - 473.1 Ma)

• group of beds-level stratigraphic resolution

Environment/lithology: shoreface; lithified, glauconitic, calcareous sandstone and siltstone

• Lithology varies somewhat with locality and stratigraphic position within the formation; lithology generally described as a mixture of quartzose and calcareous siltstone, impure nodular limestone, chert, and minor glauconitic shale. Represents the base of a transgressive sequence that continues into overlying Gordon Limestone Group; base in most areas is coarse quartz sandstone with worm borrows and snails, ripple marks, load casts, and trough cross-bedding.

Size classes: macrofossils, mesofossils

Primary reference: K. D. Corbett and M. R. Banks. 1974. Ordovician stratigraphy of the Florentine Synclinorium, southwest Tasmania. Papers and Proceedings of the Royal Society of Tasmania 107:207-238 [A. Miller/P. Novack-Gottshall/A. Clement]more details

Purpose of describing collection: biostratigraphic analysis

PaleoDB collection 211109: authorized by Pete Wagner, entered by Pete Wagner on 24.06.2020

Creative Commons license: CC BY (attribution)

Taxonomic list

• Taxonomic list a composite of several articles. PJW: I divided the original article into separate lists.
Show authors, comments, and common names
Trilobita
 Phacopida - Pliomeridae
Cybelopsis sp.
Cybelopsis sp. Poulsen 1927 trilobite
 Proetida - Hystricuridae
Tasmanaspis lewisi, Tasmanaspis lewisi, cf. Parahystricurus sp., "Hystricurus cf. genulatus" = Genalaticurus genalatus
Tasmanaspis lewisi Kobayashi 1940 trilobite
Tasmanaspis lewisi Kobayashi 1940 trilobite
cf. Parahystricurus sp. Ross 1951 trilobite
"Hystricurus cf. genulatus" = Genalaticurus genalatus Ross 1951 trilobite
 Asaphida - Hungaiidae
"Asaphopsis juneensis" = Asaphopsoides florentinensis
"Asaphopsis juneensis" = Asaphopsoides florentinensis Etheridge 1905 trilobite
Strophomenata
 Billingsellida - Polytoechiidae
Tritoechia cf. planulata, ? Tritoechia careyi
? Tritoechia careyi Brown 1948
Bivalvia
 Nuculanida - Cucullellidae
"Nuculites (Cleidophorus) sp." = Nuculites
"Nuculites (Cleidophorus) sp." = Nuculites Conrad 1841 clam
Nuculites (Cleidophorus) cf. planulatus: but this is a much younger species!