Walloon Coal Measures | |
---|---|
Stratigraphic range:
Oxfordian-
early Tithonian ~ | |
Type | Subgroup |
Unit of | Injune Creek Group |
Sub-units | Juandah Coal Measures, Maclean Sandstone Member, Tangalooma Sandstone, Taroom Coal Measures, Mutdapilly fossil locality |
Underlies | Springbok Sandstone |
Overlies | Hutton Sandstone, Eurombah Formation |
Thickness | 420–700 m (1,380–2,300 ft) |
Lithology | |
Primary | Shale, sandstone, siltstone |
Other | Coal, limestone |
Location | |
Coordinates | 27°00′S 152°36′E / 27.0°S 152.6°E |
Approximate paleocoordinates | 67°12′S 93°18′E / 67.2°S 93.3°E |
Region | ![]() |
Country | ![]() |
Extent | Surat & Clarence-Moreton Basins |
Type section | |
Named for | Walloon |
Named by | Dudgeon |
Year defined | 1982 |
The Walloon Coal Measures are a Late Jurassic geologic subgroup in Queensland, Australia. Deposited within the Surat Basin, it is considered Oxfordian to early Tithonian in age based on lead-uranium dating of tuffites within the unit. [1]
The 420 to 700 metres (1,380 to 2,300 ft) thick formation comprises thin-bedded, claystones, shales, siltstones, lithic and sublithic to feldspathic arenites, coal seams and partings and minor limestone. The formation is laterally equivalent to the Mulgildie Coal Measures and Birkhead Formation. [2]
The formation, in the Jurassic in the South Polar region, has provided fossil flora and trace fossils of theropods, ornithopods and Changpeipus bartholomaii and Garbina roeorum. [3] [4] The dinosaur Rhoetosaurus is known from the unit. [1] 11 tracks are known from the formation, mostly those of large (prints 30-75 centimetres in length) theropods. [5]
Walloon Coal Measures | |
---|---|
Stratigraphic range:
Oxfordian-
early Tithonian ~ | |
Type | Subgroup |
Unit of | Injune Creek Group |
Sub-units | Juandah Coal Measures, Maclean Sandstone Member, Tangalooma Sandstone, Taroom Coal Measures, Mutdapilly fossil locality |
Underlies | Springbok Sandstone |
Overlies | Hutton Sandstone, Eurombah Formation |
Thickness | 420–700 m (1,380–2,300 ft) |
Lithology | |
Primary | Shale, sandstone, siltstone |
Other | Coal, limestone |
Location | |
Coordinates | 27°00′S 152°36′E / 27.0°S 152.6°E |
Approximate paleocoordinates | 67°12′S 93°18′E / 67.2°S 93.3°E |
Region | ![]() |
Country | ![]() |
Extent | Surat & Clarence-Moreton Basins |
Type section | |
Named for | Walloon |
Named by | Dudgeon |
Year defined | 1982 |
The Walloon Coal Measures are a Late Jurassic geologic subgroup in Queensland, Australia. Deposited within the Surat Basin, it is considered Oxfordian to early Tithonian in age based on lead-uranium dating of tuffites within the unit. [1]
The 420 to 700 metres (1,380 to 2,300 ft) thick formation comprises thin-bedded, claystones, shales, siltstones, lithic and sublithic to feldspathic arenites, coal seams and partings and minor limestone. The formation is laterally equivalent to the Mulgildie Coal Measures and Birkhead Formation. [2]
The formation, in the Jurassic in the South Polar region, has provided fossil flora and trace fossils of theropods, ornithopods and Changpeipus bartholomaii and Garbina roeorum. [3] [4] The dinosaur Rhoetosaurus is known from the unit. [1] 11 tracks are known from the formation, mostly those of large (prints 30-75 centimetres in length) theropods. [5]