Wonthaggi Formation

Coordinates: 38°42′S 145°42′E / 38.7°S 145.7°E / -38.7; 145.7
Source: Wikipedia, the free encyclopedia.

Wonthaggi Formation
Stratigraphic range: Valanginian–Barremian
Approximate paleocoordinates
77°00′S 117°30′E / 77.0°S 117.5°E / -77.0; 117.5
RegionVictoria
CountryAustralia
ExtentGippsland Basin

Exposure of Wonthaggi Formation green in bottom-right

The Wonthaggi Formation is an informal geological

Strzelecki Group within the Gippsland Basin. Dinosaur remains are among the fossils that have been recovered from the formation.[1][2] It is partially equivalent to the Eumeralla Formation
.

Geology

The Wonthaggi Formation was deposited within Gippsland Basin, which formed part of a

fluvially deposited siliciclastics derived from volcanic rocks of the Whitsunday Silicic Large Igneous Province to the East, with suggestions that the sediments either originated from braided river and sheet flood deposits, or meandering river systems on vegetated floodplains.[3] The age of the formation is thought to be Valanginian to Barremian, with the Flat Rocks site being late Barremian (~125 Ma) in age, older than the sediments from the Eumeralla Formation, which are thought to be Aptian-Albian in age.[3]

Permafrost

aapa mires. Periods of warmer, temperate climate conditions are recorded as Ultisols in the Valanginian interval of the sedimentary unit.[4]

Vertebrate paleofauna

Indeterminate ornithopod remains are present in Victoria, Australia.[3] Indeterminate megaraptorid remains are present in Victoria, Australia.[5]

Amphibians

Amphibians of the Wonthaggi Formation
Genus Species Presence Notes Images
Koolasuchus K. cleelandi Tree Trunk Point, Dwyers Hill, San Remo Chigutisaurid temnospondyl, last known temnospondyl

Dinosaurs

Ornithischians

Ornithischians
of the Wonthaggi Formation
Genus Species Locality Material Notes Images
Ankylosauria indet.[6] Indeterminate Flat Rocks Teeth, dorsal vertebra, ribs, osteoderms
Atlascopcosaurus
Qantassaurus

cf. Atlascopcosaurus[3]

cf. A. loadsi[3]

Flat Rocks

known as "Victorian ornithopod maxillary morphotype 4", consists of a partial right maxilla Intermediate in morphology between Galleonosaurus and Atlascopcosaurus

Galleonosaurus[3]

G. dorisae[3]

Flat Rocks

Known from a maxilla

Qantassaurus[1]

Q. intrepidus[1]

Flat Rocks

"[Three] dentaries and teeth."[7]

Q. ?intrepidus[3] Flat Rocks Known as "Victorian ornithopodan dentary morphotype 2", represented by two dentary fragments, Possibly distinct from Q. intrepidus

Serendipaceratops[1]

S. arthurclarkei[1]

The Arch, Kilcunda

Single damaged ulna
Ornithopoda indet.[3] Indeterminate Flat Rocks Dentaries referred to as "Victorian ornithopodan dentary morphotype 3" including P228408, NMV P231182, NMV P199135 and isolated teeth Different from Q. intrepidus.
Ornithopoda indet.[3] Indeterminate Cape Paterson single femur Known as "Victorian Hypsilophodontid Femur Type 2". Larger than contemporaneous ornithopods.

Theropods

Theropods
of the Wonthaggi Formation
Genus Species Locality Material Notes Images

Aves[8]

Indeterminate

Possibly also present at the Eumeralla Formation (footprints).

Single furcula.

Megaraptora indet. Indeterminate Flat Rocks Numerous isolated teeth, and a left astragalus[9] Originally referred to "Allosaurus" robustus
Megaraptoridae indet.[10]
 Indeterminate Shack Bay a complete frontal, attached to a partial parietal
Noasauridae[11] Indeterminate San Remo Member NMV P221202, astragalocalcaneum A non-
elaphrosaurine
noasaurid.

Mammals

Mammals of the Wonthaggi Formation
Genus Species Presence Material Notes Images
Ausktribosphenos A. nyktos Flat rocks Partial dentary with teeth Ausktribosphenid
Bishops
 B. whitmorei Partial dentary with teeth Ausktribosphenid
Corriebaatar C. marywaltersae "NMV P216655, a fragment of a left dentary bearing a complete plagiaulacoid p4 and the anterior root of m1" Multituberculate
Kryoparvus K. gerriti Partial dentary with teeth ?Ausktribosphenid
Teinolophos T. trusleri Partial dentary with teeth Monotreme

See also

  • List of dinosaur-bearing rock formations
  • South Polar region of the Cretaceous

References

  1. ^
    ISBN 0-520-24209-2
    .
  2. ^ . "Wonthaggi Formation", Australian Stratigraphic Units Database, Geoscience Australia, retrieved 2011-09-18
  3. ^
    doi:10.1017/jpa.2018.95
    .
  4. ISSN 0812-0099
    .
  5. S2CID 133845914
    .
  6. S2CID 128882257
    .
  7. ^ "Table 18.1," in Weishampel, et al. (2004). Page 395.
  8. doi:10.1111/pala.12082
    .
  9. S2CID 208603798
    .
  10. ISSN 0195-6671
    .
  11. PMID 31996712
    .
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