Allaru Formation

The Allaru Formation, also known as the Allaru Mudstone, is a geological formation in Queensland, Australia, whose strata date back to the Early Cretaceous. Dinosaur remains are among the fossils that have been recovered from the formation.^[1]

Allaru Formation
Stratigraphic range: Albian ~112–100 Ma PreꞒ Ꞓ O S D C P T J K Pg N
Type	Geological formation
Unit of	Rolling Downs Group
Underlies	Mackunda Formation
Overlies	Toolebuc Formation
Thickness	Up to 700 m (2,300 ft)
Lithology
Primary	Mudstone
Other	Siltstone, sandstone, limestone
Location
Coordinates	24°52′02.17″S 146°14′19.85″E
Approximate paleocoordinates	51.0°S 133.1°E / -51.0; 133.1
Region	Queensland
Country	Australia
Extent	Eromanga Basin
Allaru Formation (Australia) Show map of Australia Allaru Formation (Queensland) Show map of Queensland

Fossil content

Possible indeterminate ankylosaur remains are present in Queensland. Indeterminate ornithopod remains are present in Queensland.^[1]

Archosaurs

Dinosaurs

Genus	Species	Location	Material	Notes	Images
Austrosaurus	A. mckillopi	Queensland	"Doral vertebrae [and possible] incomplete limb remains from several individuals"[2]	A Somphospondyli sauropod. [1]
Kunbarrasaurus	K. ieversi	Queensland		A parankylosaur. [1][3]
?Muttaburrasaurus	?M. sp.	Queensland		[1]

Reptiles

Genus	Species	Location	Material	Notes	Images
Elasmosauridae	Indeterminate		Specimen number QMF2100, an articulated torso. Stomach cavity contains crustacean and fish remains as well as ~135 gastroliths.[4]	[4]
Notochelone	N. costata			[5]
Platypterygius	P. australis (=longmani)			[5]

Fish

Genus	Species	Location	Material	Notes	Images
Cooyoo	C. australis	Queensland		[6]
Flindersichthys	F. denmeadi			[7]
Pachyrhizodus	P. marathonensis, P. grawi			Two species known from both this and the Toolebuc Formation[8]
Richmondichthys	R. sweeti			An aspidorhynchid also found in the Toolebuc Formation[9]

Invertebrates

Genus	Species	Location	Material	Notes	Images
Eromangateuthis	E. soniae	Queensland	"Gladius"	[2]
Goodhallites	G. goodhalli			[10]
Inoceramus	I. sutherlandi	Queensland		[11]
Mckenziephyllia	M. accordensis			[12]

See also

• List of dinosaur-bearing rock formations
  • Winton Formation
• Paja Formation, contemporaneous Lagerstätte in Colombia
• Sierra Madre Formation, contemporaneous fossiliferous formation of Mexico
• Santana Group, contemporaneous Lagerstätte in northeastern Brazil
  • Crato Formation
  • Romualdo Formation
• South Polar region of the Cretaceous