Marree Subgroup
The Marree Subgroup, previously described as Maree Formation and Marree Formation, is a geological subgroup in the Eromanga Basin of South Australia whose strata date back to the Aptian. The subgroup was first described as a formation by Forbes in 1966.[2][3] Dinosaur remains are among the fossils that have been recovered from the formation.[1]
| Marree Subgroup | |
|---|---|
| Stratigraphic range: Aptian-Albian[1] | |
| Type | Subgroup |
| Unit of | Rolling Downs Group |
| Sub-units | Bellinger Sandstone, Bulldog Shale, Coorikiana Sandstone, Oodnadatta Formation |
| Underlies | Mackunda & Winton Formations |
| Overlies | Parabarana Sandstone, Cadna-owie Formation |
| Lithology | |
| Primary | Siltstone |
| Other | Gravel, conglomerate, shale, clay |
| Location | |
| Coordinates | 30°26′0″S 137°10′0″E |
| Approximate paleocoordinates | 57.1°S 117.3°E |
| Region | South Australia |
| Country | .svg.png.webp){kind=small} Australia |
| Extent | Eromanga Basin |
| Type section | |
| Named for | Marree |
| Named by | Forbes |
| Year defined | 1966 |
  Marree Subgroup (Australia) | |
An opalised plesiosaur specimen of the genus Umoonasaurus has been nicknamed 'Eric' and was described in 1998 by Schroeder.[4] The decapod crab Dioratiopus salebrosus was described in 1980.[5]
Vertebrate paleofauna
Indeterminate theropod remains present in Western Australia.[1]
Dinosaurs
| Dinosaurs of the Marree Subgroup | ||||
|---|---|---|---|---|
| Genus | Species | Presence | Notes | Images |
|
K. kujani[1] |
Geographically present in Western Australia, Australia.[1] |
"Hindlimb."[6] |
||
Sauropterygians
| Sauropterygians of the Marree Subgroup | ||||
|---|---|---|---|---|
| Genus | Species | Presence | Notes | Images |
|
U. demoscyllus[7] |
Bulldog Shale of northern South Australia.[7] |
Known from an opalized skeleton nicknamed 'Eric'. |
 | |
References
- Weishampel, David B; et al. (2004). "Dinosaur distribution (Early Cretaceous, Australasia)." In: Weishampel, David B.; Dodson, Peter; and Osmólska, Halszka (eds.): The Dinosauria, 2nd, Berkeley: University of California Press. Pp. 573-574. ISBN 0-520-24209-2.
- 1988 - Tanh Van Doan - Sedimentology and mineralogy of some Jurassic-Cretaceous sediments of the southern Eromanga Basin - MSc. thesis
- "Marree Subgroup". Australian Stratigraphic Units Database. Geoscience Australia and Australian Stratigraphy Commission. Retrieved 23 August 2018.
- 1999 - Recent developments in Australasian sauropterygian palaeontology (Reptilia: Sauropterygia) - Records of the Western Australian Museum Supplement No. 57: 201-205
- Wooldridge Creek, Alberga River at Fossilworks.org
- "Table 4.1," in Weishampel, et al. (2004). Page 76.
- Kear; Schroeder; Lee, Benjamin P; Natalie I; Michael S. Y (2006). "An archaic crested plesiosaur in opal from the Lower Cretaceous high-latitude deposits of Australia". Biology Letters. 2 (4): 615–619. doi:10.1098/rsbl.2006.0504. PMC 1833998. PMID 17148303.
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Further reading
- Schroeder, N. (1998). A review of order Pliosauria, and the description of a new, opalised pliosauroid, from the Early Cretaceous of Coober Pedy, South Australia. M.Sc. thesis, Monash University, Clayton, Victoria
- M. F. Glaessner. 1980. New Cretaceous and Tertiary crabs (Crustacea: Brachyura) from Australia and New Zealand. Transactions of the Royal Society of South Australia 104(6):171-192