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 / -57.1; 117.3
Region	South Australia
Country	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
Kakuru[1]	K. kujani[1]	Geographically present in Western Australia, Australia.[1]	"Hindlimb."[6]

Sauropterygians

Sauropterygians of the Marree Subgroup
Genus	Species	Presence	Notes	Images
Umoonasaurus[7]	U. demoscyllus[7]	Bulldog Shale of northern South Australia.[7]	Known from an opalized skeleton nicknamed 'Eric'.

See also

• List of dinosaur-bearing rock formations