Marree Subgroup

{{Short description|Geological subgroup in South Australia}}

{{Use Australian English|date=May 2024}}

{{Infobox rockunit

| name = Marree Subgroup

| image =

| caption =

| type = Subgroup

| age = Aptian-Albian

| period = Albian

| prilithology = Siltstone

| otherlithology = Gravel, conglomerate, shale, clay

| region = South Australia

| country = Australia

| coordinates = {{Coord|30|26|0|S|137|10|0|E|display=inline,title}}

| paleocoordinates = {{coord|57.1|S|117.3|E|display=inline}}

| unitof = Rolling Downs Group

| subunits = Bellinger Sandstone, Bulldog Shale, Coorikiana Sandstone, Oodnadatta Formation

| underlies = Mackunda & Winton Formations

| overlies = Parabarana Sandstone, Cadna-owie Formation

| thickness =

| extent = Eromanga Basin

| area =

| map = {{Location map+ | Australia

| relief = 1

| width = 250

| float = center

| places =

{{Location map~ | Australia

| lat_deg = -30.4

| lon_deg = 137.1

| mark = Green pog.svg

| marksize = 12

}}

}}

| map_caption =

| namedfor = Marree

| namedby = Forbes

| year_ts = 1966

}}

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 1966.1988 - Tanh Van Doan - Sedimentology and mineralogy of some Jurassic-Cretaceous sediments of the southern Eromanga Basin - MSc. thesis{{cite web |url= http://dbforms.ga.gov.au/pls/www/geodx.strat_units.sch_full?wher=stratno=11374|title= Marree Subgroup|last= |first= |date= |publisher= Geoscience Australia and Australian Stratigraphy Commission|work = Australian Stratigraphic Units Database|access-date= 23 August 2018|quote=}} Dinosaur remains are among the fossils that have been recovered from the formation.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}}.

An opalised plesiosaur specimen of the genus Umoonasaurus has been nicknamed 'Eric' and was described in 1998 by Schroeder.[http://museum.wa.gov.au/sites/default/files/16.%20Cruickshank,%20Fordyce,%20Long.pdf 1999 - Recent developments in Australasian sauropterygian palaeontology (Reptilia: Sauropterygia) - Records of the Western Australian Museum Supplement No. 57: 201-205] The decapod crab Dioratiopus salebrosus was described in 1980.[https://paleobiodb.org/classic/displayCollResults?collection_no=37715 Wooldridge Creek, Alberga River] at Fossilworks.org