Winton Formation

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Winton Formation
Stratigraphic range: Albian-Cenomanian ~108–93.9 Ma
Winton formation.svg
Formation distribution
Type Geological formation
Unit of Eromanga Basin
Overlies Mackunda Formation[1]
Thickness over 400 m
Lithology
Primary Sandstone Siltstone Claystone
Location
Region Queensland
Country  Australia

The Winton Formation is a Cretaceous formation in central-western Queensland, Australia. The sauropod dinosaur Austrosaurus is found in the early Cretaceous Winton formation.

The formation is a rock unit that blankets large areas of central-western Queensland. It consists of sedimentary rocks such as sandstone, siltstone and claystone. The sediments that make up these rocks represent the remnants of the river plains that filled the basin left by the Eromanga Sea - an inland sea that covered large parts of Queensland and central Australia at least four times during the Early Cretaceous. Great meandering rivers, forest pools and swamps, creeks, lakes and coastal estuaries, all left behind different types of sediment.

In some areas, the Winton Formation is over 400 metres thick. To bring with them such a huge amount of sediment, the rivers that flowed across these plains must have been comparable in size to the present day Amazon or Mississippi rivers . As more and more sediment was brought in, the margins of the inland sea slowly contracted. By around 95 million years ago, the job was complete and the inland sea would never be seen again.

By virtue of its age and the environmental conditions under which the rocks it consists of were deposited, the Winton Formation represents one of the richest sources of dinosaur fossils anywhere in Australia.

Fauna[edit]

A fossil footprint-(ichnite), Wintonopus, found with two other dinosaur genera footprints at the Lark Quarry in Australia, c.f. Tyrannosauropus and Skartopus, have been found in the Winton Formation. The crocodyliform Isisfordia duncani was also found. [2][3]

Dinosaurs of the Winton Formation
Taxa Presence Description Images

Genus:

  1. A. wintonensis[4]
  1. Geographically located in Queensland, Australia.[5]
A lightweight predatory megaraptoran theropod 6 meters (20 ft) long.[6][7][8]

Genus:

  1. W. wattsi[4]
  1. Geographically located in Queensland, Australia.[5]
A giant herbivorous titanosaurian sauropod.[6]

Genus:

  1. D. matildae[4]
  1. Geographically located in Queensland, Australia.[5]
A giant, stocky herbivorous titanosaurian sauropod about 15–16 metres (49–52 ft) in length.[6]

Genus:

  1. Austrosaurus sp.[5]
  1. Geographically located in Queensland, Australia.[5]

Genus:

  1. S. elliotorum[9]
  1. Geographically located in Queensland, Australia.[5]
A giant herbivorous titanosaurian sauropod about 15 metres (49 ft) in length.[10]
  1. Tracks.[5]
  1. Geographically located in Queensland, Australia.[5]

Order:

  1. Indeterminate remains.[5]
  1. Geographically located in Queensland, Australia.[5]

Order:

  1. Indeterminate remains.[5]
  1. Geographically located in Queensland, Australia.[5]

Infraorder:

  1. Undescribed genus.[5]
  2. Tracks.[5]
  1. Geographically located in Queensland, Australia.[5]
  2. Geographically located in Queensland, Australia.[5]

See also[edit]

References[edit]

  1. ^ http://www.anra.gov.au/topics/water/availability/qld/gmu-winton-mackunda-formations.html
  2. ^ "Missing link crocodile found down under". Science Buzz. Science Museum of Minnesota. 18 June 2006. Retrieved 11 July 2013.
  3. ^ "Ancestor of all modern crocodilians discovered in outback Queensland". The University of Queensland. 14 June 2006. Retrieved 11 July 2013.
  4. ^ a b c d e f Hocknull, SA; White, MA; Tischler, TR; Cook, AG; Calleja, ND; et al. (2009). "New Mid-Cretaceous (Latest Albian) Dinosaurs from Winton, Queensland, Australia". PLoS ONE. 4 (7): e6190. doi:10.1371/journal.pone.0006190. PMC 2703565Freely accessible. PMID 19584929. 
  5. ^ a b c d e f g h i j k l m n o p q r s t u Weishampel, David B; et al. (2004). "Dinosaur distribution (Late Cretaceous, Australasia)." In: Weishampel, David B.; Dodson, Peter; and Osmólska, Halszka (eds.): The Dinosauria, 2nd, Berkeley: University of California Press. Pp. 605-606. ISBN 0-520-24209-2.
  6. ^ a b c "Scientists Find Dinosaur That Lived 98M Years Ago in Australia". Associated Press. Fox News. 3 July 2009. Retrieved 2009-07-03. 
  7. ^ "New dinosaurs found in Australia". BBC News. 3 July 2009. Retrieved 2009-07-03. 
  8. ^ "Triple Fossil Find Puts Australia Back On The Dinosaur Map". Science Daily. 3 July 2009. Retrieved 2009-07-03. 
  9. ^ a b Poropat, S.F.; Mannion, P.D.; Upchurch, P.; Hocknull, S.A.; Kear, B.P.; Kundrát, M.; Tischler, T.R.; Sloan, T.; Sinapius, G.H.K.; Elliott, J.A.; Elliott, D.A. (2016). "New Australian sauropods shed light on Cretaceous dinosaur palaeobiogeography". Scientific Reports. 6: 34467. doi:10.1038/srep34467. PMC 5072287Freely accessible. PMID 27763598. 
  10. ^ Geggel, Laura (2016). "Wide-Hipped Dinosaur the Size of a Bus Once Trod Across Australia". Live Science. Purch.