Loading AI tools
Informal Triassic geological unit in Madagascar From Wikipedia, the free encyclopedia
Isalo II, also known as the Makay Formation, is an informal Triassic geological unit in Madagascar.[1]
Isalo II Formation | |
---|---|
Stratigraphic range: Ladinian-Carnian | |
Type | Geological formation |
Unit of | Isalo Group |
Underlies | Isalo III Formation (unconformity) |
Overlies | Isalo I Formation |
Lithology | |
Primary | Sandstone, mudstone |
Location | |
Coordinates | 20.3°S 45.4°E |
Approximate paleocoordinates | 23.1°S 24.7°E |
Region | Mahajanga & Toliara Provinces |
Country | Madagascar |
Extent | Morondava Basin, Mahajanga Basin |
It is described as "thick beds of mottled red or green clays associated with soft cross-bedded sandstones, light in colour and much finer-grained than the Isalo I sandstones." It is prominent in the Makay Massif.[2]
Amphibians | ||
---|---|---|
Taxon | Material | Notes |
Metoposauridae indet. | An interclavicle, skull fragments, and intercentra | Indeterminate metoposaurid remains similar to those of Indian metoposaurids. Some fossils were the basis for the dubious species "Metoposaurus hoffmani". May be from Isalo II or III.[3] |
Stereospondyli indet. | Interclavicles | Indeterminate stereospondyl remains. May be from Isalo II or III.[3] |
Synapsids | ||
---|---|---|
Taxon | Material | Notes |
Archosauriformes sp. | Teeth, a coracoid, a centrum fragment, and cranial fragments | Various indeterminate fragments, some of which may belong to dinosaurs.[4] |
Azendohsaurus madagaskarensis[5] | Numerous skulls and postcranial fossils[1] | An allokotosaurian archosauromorph,[6][7][1] originally mistakenly identified as a "prosauropod" dinosaur.[5] |
Isalorhynchus genovefae | Numerous fossils representing parts of the skull and postcrania | A rhynchosaur sometimes considered a species of Hyperodapedon.[8] Possibly represents two taxa.[9] Reported sphenodontian[5] fossils are most likely juvenile rhynchosaurs instead.[10] |
Kongonaphon kely[11] | A maxilla and postcranial material | A tiny lagerpetid avemetatarsalian[12] |
Mambachiton fiandohana[13] | A partial skeleton | An armored basal avemetatarsalian[14] |
Phytosauria indet. | Teeth | Similar to Rutiodon teeth.[4] |
Procolophonidae sp. | A jaw fragment and other remains | An unnamed procolophonid parareptile[8] |
Pseudosuchia indet. | Osteoderms | Likely referable to stagonolepid aetosaurs, though similar to goniopholidid crocodylomorphs as well.[4] |
Silesauridae sp. | An unnamed silesaurid dinosauromorph[14] | |
Synapsids | ||
---|---|---|
Taxon | Material | Notes |
Chiniquodon kalanoro[15] | Part of a jaw | A chiniquodontid cynodont |
Dadadon isaloi[16] | Several skulls and jaw fragments[17][18] | A massetognathine[18] traversodontid cynodont |
Kannemeyeriiformes sp. | An unnamed kannemeyeriiform dicynodont[5][15][1] | |
Menadon besairiei[16] | Skulls, jaws, and postcranial material[19] | A traversodontid cynodont |
Seamless Wikipedia browsing. On steroids.
Every time you click a link to Wikipedia, Wiktionary or Wikiquote in your browser's search results, it will show the modern Wikiwand interface.
Wikiwand extension is a five stars, simple, with minimum permission required to keep your browsing private, safe and transparent.