Allaru Formation
Geological formation in Australia
From Wikipedia, the free encyclopedia
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 ~ | |
| 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 |
| Region | Queensland |
| Country | Australia |
| Extent | Eromanga Basin |
  Allaru Formation (Australia)  Allaru Formation (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] Specimens may have been carried out to sea before being scavenged by marine life such as Kronosaurus.[3] |  |
| Kunbarrasaurus | K. ieversi | Queensland | A parankylosaur.[1][4] |  | |
| ?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.[5] | [5] | ||
| Notochelone | N. costata | [6] |  | ||
| Platypterygius | P. australis (=longmani) | [6] |  |
Fish
| Genus | Species | Location | Material | Notes | Images |
|---|---|---|---|---|---|
| Cooyoo | C. australis | Queensland | [7] | ||
| Flindersichthys | F. denmeadi | [8] | |||
| Pachyrhizodus | P. marathonensis, P. grawi | Two species known from both this and the Toolebuc Formation[9] | |||
| Richmondichthys | R. sweeti | An aspidorhynchid also found in the Toolebuc Formation[10] |
Invertebrates
| Genus | Species | Location | Material | Notes | Images |
|---|---|---|---|---|---|
| Eromangateuthis | E. soniae | Queensland | "Gladius" | [2] | |
| Goodhallites | G. goodhalli | [11] | |||
| Inoceramus | I. sutherlandi | Queensland | [12] | ||
| Mckenziephyllia | M. accordensis | [13] |
See also
- List of dinosaur-bearing rock formations
- Paja Formation, contemporaneous Lagerstätte in Colombia
- Sierra Madre Formation, contemporaneous fossiliferous formation of Mexico
- Santana Group, contemporaneous Lagerstätte in northeastern Brazil
- South Polar region of the Cretaceous