Bringo railway cutting (UWA) (Jurassic to of Australia)

Where: Western Australia, Australia (28.7° S, 114.8° E: paleocoordinates 39.8° S, 57.5° E)

• coordinate based on nearby landmark

• small collection-level geographic resolution

When: Colalura Sandstone Formation (Champion Bay Group), Aalenian to Aalenian (174.1 - 168.4 Ma)

• Referred to Sowerbyi and perhaps Sauzei and Humphriesianum Zones of the Middle Bajocian

•"(listed as ‘middle’ Bajocian by Long and Cruickshank 1998, p. 47 but probably spanning the Aalenian–lower Bajocian" (Kear 2012, p. 1125)

•"Turner et al. (2009) correlated the Champion Bay Group (see stratigraphical transect in Mory et al. 2005) – which comprises the conformably ascending Colalura Sandstone (<500 mm thick), Bringo Shale (2.1 m), Newmaracarra Limestone (up to 10 m), and Kojarena Sandstone (10 m) – with the Aalenian to middle Bajocian Callialasporites turbatus spore-pollen zone/Dissillodinium caddaense dinocyst zone, and overlying middle–upper Bajocian Dictyotosporites complex spore-pollen/Nannoceratopsis deflandrei dinocyst zones (sensu Partridge 2006). Hall (1989, p. 4) specifically placed the Newmaracarra Limestone within the lower Bajocian ‘ovalis/laeviuscula’ European ammonite zones (= ‘Ovale’ and ‘Laeviuscula’ zones as redefined by Dietze et al. 2007, p. 9), inferring an Aalenian age for at least the basal-most Colalura Sandstone strata." (Kear 2012, p. 1132)

• bed-level stratigraphic resolution

Environment/lithology: marine; ferruginous, conglomeratic sandstone and conglomeratic sandstone

• "These represent a transgressive shallow marine accumulation from a narrow embayment that extended southwards from the Meso-Tethys Ocean into the developing rift-zone between Australia and India during the Middle Jurassic (Veevers 1971; Grant-Mackie et al. 2000)" (Kear 2012, p. 1132)
• "Lithologically, the Champion Bay Group strata consist of ferruginous conglomeratic sandstones (derived from a weathered shelly limestone) that grade upwards through, shales, leached bioclastic (coqinoid) limestone, claystone and coarse sandstones (Mory et al. 2005)." (Kear 2012, p. 1132)

Size class: macrofossils

Collected in 1963-1986

Collection methods: surface (float), surface (in situ), mechanical,

• collected by four year-12 Scotch College students in 1966

•"WAM 86.10.707 was recovered in early September 1986 from loose rubble along the northern foot of the rail cutting, and thus could have eroded from sediments higher in the sequence. Conversely, UWA 36112 only has a batch registration dating from 1952/53 that lists ‘Bringo Cutting, Colalura Sandstone’ sourced from ‘P. E. Playford’ (R. John Reeve (University of Western Australia), pers. comm. 2011). WAM 63.5.13 was found by Mr Lindsay J. Peet on the ‘24.5.1963’, and derived from a surface erosion channel in the Newmarracarra Limestone (contrary to Long and Cruickshank 1998, p. 47). Another specimen not described by Long and Cruickshank (1998) is a large tooth (WAM 83.10.1) labelled ‘Ichthyosaurus’, that was collected from the Colalura Sandstone by Mr G. Wallace in 1983 but no further information is available.

Primary reference: J. A. Long and R. E. Molnar. 1998. A new Jurassic theropod dinosaur from Western Australia. Records of the Western Australian Museum 19:121-129 [M. Carrano/M. Carrano/M. Carrano]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 48125: authorized by Matthew Carrano, entered by Matthew Carrano on 14.03.2005, edited by Hallie Street and Roger Benson

Creative Commons license: CC BY (attribution)

Taxonomic list

unclassified
  -
Plantae indet. Haeckel 1866
fossil wood
Reptilia
 Theropoda -
Ozraptor subotaii n. gen. n. sp.
Ozraptor subotaii n. gen. n. sp. Long and Molnar 1998 theropod
MWA 82469
 Saurischia -
Sauropoda indet. sauropod
UWA 82468
 Plesiosauria -
Plesiosauria indet.2 de Blainville 1835 plesiosaur
WAM 63.5.13 phalanx; UWA 36112 vertebra
Pliosauroidea indet.1 Welles 1943 plesiosaur
WAM 86.10.707 pectoral vertebra