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T-Bone Extension, Coocoran Opal Fields, 35 m west of Lightning Ridge (Cretaceous to of Australia)

Where: New South Wales, Australia (29.4° S, 147.7° E: paleocoordinates 64.4° S, 134.9° E)

• coordinate estimated from map

• outcrop-level geographic resolution

When: Wallangulla Sandstone Member (Griman Creek Formation), Early/Lower Albian to Early/Lower Albian (112.6 - 105.3 Ma)

• "Finch clay facies" within the Wallangulla Sandstone Member of the Griman Creek Formation (Holmes and Senior 1976; Watkins 1984). The "Finch clay facies" or "opal dirt" is considered to be either early to middle Albian (Coptospora paradoxa spore-pollen Zone; Burger 1980), or middle Albian in age (Dettmann et al. 1992)

• bed-level stratigraphic resolution

Environment/lithology: estuary or bay; claystone

• Invertebrate fossils, vertebrate taphonomy and sedimentary evidence has been used to infer a freshwater deltaic to estuarine depositional setting, and plant/isotopic data indicates a seasonal, cool temperate climate (Dettmann et al. 1992).
• fine-grained, deeply weathered volcanogenic clays (60–65% silica-rich kaolinite, ~20% smectite with low alumina content, and 5% illite: Watkins 1984) that occur in discontinuous lenses up to 5 meters thick

Size class: macrofossils

Preservation: cast, replaced with silica

Collected by Rob and Debbie Brogan

Collection methods: quarrying,

• Australian Museum collection.

•The holotype specimens of Spoochelys ormondea were excavated from a single ‘paleochannel’ by opal miners Rob and Debbie Brogan

Primary reference: E. T. Smith and B. P. Kear. 2013. Spoochelys ormondea gen. et sp. nov., an Archaic Meiolaniid-Like Turtle from the Early Cretaceous of Lightning Ridge, Australia. In D. B. Brinkman, P. A. Holroyd, J. D. Gardner (eds.), Morphology and Evolution of Turtles 121-146 [R. Benson/R. Benson/P. Holroyd] more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 133649: authorized by Roger Benson, entered by Roger Benson on 20.09.2012

Creative Commons license: CC BY (attribution)