UQL4848, Tomcat Creek Lst Mbr, Quinton Fmn, Broken River Province, NE Queensland (Silurian of Australia)

Where: Queensland, Australia (20.0° S, 145.0° E: paleocoordinates 17.0° N, 160.6° E)

• coordinate estimated from map

• outcrop-level geographic resolution

When: Tomcat Creek Limestone Member (Quinton Formation), Telychian (438.5 - 433.4 Ma)

• Allochthonous limestones near the base of the Quinton Formation. Stratigraphic sequence of members is not clear. Age assignment based on graptolites.

• member-level stratigraphic resolution

Environment/lithology: marine; shelly/skeletal wackestone and limestone

• "The limestones occur within predominantly siliciclastic turbiditic sediments, and consist of large slumped blocks, calcirudites and calcarenites. These were probably derived from contemporaneous shallow marine areas along the unstable N margin of a small, rapidly subsiding basin, which developed during the Early Silurian in a probably extensional tectonic setting."
• Siliciclastic sediments form the bulk of the Quinton Formation. Corals are from allochthonous limestone blocks. Gray Creek Member: "The limestones...contain coral and conodont faunas, and are discontinuously exposed for about 250m long strike within a thick sequence of shale, greywacke, conglomerate and minor calcirudite. These limestones may have been emplaced by large scale slumping or may be channel deposits within the turbidite sequence as suggested by Sloan et al. (1995). The most prominent Lst is a dark grey, massive, recrystallized biomicrite which reaches a max. thickness of about 35m, and which is poor in macrofossils. [Collected localities consist of] poorly exposed, thinly bedded limestone which has yielded a relatively rich rugose coral fauna..."

Reposited in the UQ

Primary reference: T. J. Munson and J. S. Jell. 1999. Llandovery rugose corals from the Quinton Formation, Broken River Province, northeast Queensland. Memoirs of the Association of Australasian Palaeontologists 21:1-65 [M. Foote/M. Foote/M. Foote]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 39227: authorized by Michael Foote, entered by Michael Foote on 24.05.2004

Creative Commons license: CC BY (attribution)

Taxonomic list

• Most of the fauna is not well studied. This monograph is confined to rugose corals.
Anthozoa
 Cystiphyllida - Tryplasmatidae
Tryplasma "sp. A" Lonsdale 1845 horn coral
 Stauriida - Stauriidae
? Palaeophyllum sp. Billings 1858 horn coral
 Stauriida - Streptelasmatidae
Grewingkia sp. Dybowski 1873 horn coral
 Stauriida - Ketophyllidae