Walloon Coal Measures
Stratigraphic range: Oxfordian-early Tithonian
~166–149 Ma

PreЄ

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 / -27.0; 152.6
Paleocoordinates|  [ ⚑ ] 67°12′S 93°18′E﻿ / ﻿67.2°S 93.3°E﻿ / -67.2; 93.3
Region|  Queensland
Country|  Australia
Extent| Surat & Clarence-Moreton Basins
Type section
Named for| Walloon
Named by| Dudgeon
Year defined| 1982

Walloon Coal Measures (Australia)

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]

## Contents

* 1 Description
* 2 Fossil content
* 3 References
* 4 Further reading

## Description

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]

## Fossil content

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]

## References

1. ↑ 1.0 1.1 Todd, Christopher N.; Roberts, Eric M.; Knutsen, Espen M.; Rozefelds, Andrew C.; Huang, Hui-Qing; Spandler, Carl (December 2019). "Refined age and geological context of two of Australia's most important Jurassic vertebrate taxa (Rhoetosaurus brownei and Siderops kehli), Queensland". Gondwana Research 76: 19–25. doi:10.1016/j.gr.2019.05.008. Bibcode: 2019GondR..76...19T.
2. ↑ Walloon Coal Measures \- Australian Stratigraphic Units Database
3. ↑ Westvale No. 5 Colliery at Fossilworks.org
4. ↑ Balgowan Colliery, Darling Downs at Fossilworks.org
5. ↑ Romilio, Anthony; Salisbury, Steven W.; Jannel, Andréas (2020-06-12). "Footprints of large theropod dinosaurs in the Middle–UpperJurassic (lower Callovian–lower Tithonian) Walloon Coal Measures of southern Queensland, Australia." (in en). Historical Biology 33 (10): 2135–2146. doi:10.1080/08912963.2020.1772252. ISSN 0891-2963. https://www.tandfonline.com/doi/full/10.1080/08912963.2020.1772252.

## Further reading

* L. C. Ball. 1933. Fossil footprints. Queensland Government Mining Journal 34(403):384
* A. Bartholomai. 1966. Fossil footprints in Queensland. Australian Natural History 15:147-150
* J. B. Cameron. 1970. The Rosewood-Walloon coalfield. Geological Survey of Queensland Publication 344:1-42
* Dudgeon, M.J., 1982, Stratigraphy and palaeobotany of east and west Haldon, Main Range, southeast Queensland., University of Queensland Department of Geology. Papers, 10(2), p83-110
* Green, P.M., Carmichael, D.C., Brain, T.J., Murray, C.G., McKellar, J.L., Beeston, J.W., Gray, A.R.G., 1997, Lithostratigraphic units in the Bowen and Surat Basins, Queensland IN: Green, P.M. (ed.) "The Surat and Bowen Basins, south-east Queensland", Queensland Minerals and Energy Review Series, Queensland Geological Survey, 1v, p41-108
* T. H. Rich and P. Vickers-Rich. 2003. A Century of Australian Dinosaurs. Queen Victoria Museum and Art Gallery and Monash Science Centre, Monash University 1-124
* J. F. Rigby. 1978. Jurassic plant fossils from the Walloon Coal Measures at Rosewood Consolidated Colliery. Queensland Government Mining Journal 526-529
* Wells, A.T., O'Brien, P.E., 1994, Lithostratigraphic framework of the Clarence-Moreton Basin IN Wells, A.T. and O'Brien, P.E. (eds.) "Geology and Petroleum Potential of the Clarence-Moreton Basin, New South Wales and Queensland", Australian Geological Survey Organisation. Bulletin, 241, p4-47

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