Chatsworth Plains D487 (Cambrian of Australia)

Where: Queensland, Australia (21.9° S, 140.3° E: paleocoordinates 25.0° N, 174.9° W)

• coordinate estimated from map

• outcrop-level geographic resolution

When: Wentsuia iota - Rhaptagnostus apsis trilobite zone, Chatsworth Formation, Iverian (494.0 - 489.5 Ma)

• bed-level stratigraphic resolution

Environment/lithology: open shallow subtidal; lithified, peloidal, shelly/skeletal, silty grainstone

• "rocks were deposited in high energy shallow subtidal, intertidal and possibly aeolian environments"
• "Intraclastic limestone - silty pelletal skeletal grainstone, mud patches, and skeletal pelletal grainstone."

Size class: macrofossils

Preservation: mold/impression

Collected by Shergold, F. de Keyser, C.E. Murrary, R. Thieme in 1968

Collection methods: surface (in situ), mechanical,

Primary reference: J. H. Shergold. 1980. Late Cambrian trilobites from the Chatsworth Limestone, western Queensland. Bureau of Mineral Resources, Geology and Geophysics Bulletin 186:1-108 [M. Hopkins/M. Hopkins]more details

Purpose of describing collection: biostratigraphic analysis

PaleoDB collection 228220: authorized by Melanie Hopkins, entered by Melanie Hopkins on 23.11.2022

Creative Commons license: CC BY (attribution)

Taxonomic list

Brachiopoda
  -
Brachiopoda indet. Cuvier 1805
Artiopoda
 Agnostida - Agnostidae
Connagnostus sp. Opik 1967
Connagnostus aversus Shergold 1980
Acmarhachis hybrida n. sp. Shergold 1980
 Agnostida - Diplagnostidae
 Agnostida - Spinagnostidae
Trilobita
  - Changshaniidae
Wentsuia iota Shergold 1980 trilobite
 Asaphida - Ceratopygidae
Haniwoides varia Shergold 1980 trilobite
 Asaphida - Asaphidae
Norinia sp. Troedsson 1937 trilobite
questionably assigned to genus
 Olenida - Aphelaspidae
Taenicephalites plerus Shergold 1980 trilobite
 Olenida - Olenidae
 Olenida - Idahoiidae
Maladioidella doylei Shergold 1980 trilobite