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Isalo II information


Isalo II Formation
Stratigraphic range: Ladinian-Carnian
TypeGeological formation
Unit ofIsalo Group
UnderliesIsalo III Formation (unconformity)
OverliesIsalo I Formation
Lithology
PrimarySandstone, mudstone
Location
Coordinates20°18′S 45°24′E / 20.3°S 45.4°E / -20.3; 45.4
Approximate paleocoordinates23°06′S 24°42′E / 23.1°S 24.7°E / -23.1; 24.7
RegionMahajanga & Toliara Provinces
CountryIsalo II Madagascar
ExtentMorondava Basin, Mahajanga Basin
Isalo II is located in Madagascar
Isalo II
Isalo II (Madagascar)

Isalo II, also known as the Makay Formation, is an informal Triassic geological unit in Madagascar.[1]

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]

  1. ^ Nesbitt, S.J.; Flynn, J.J.; Pritchard, A.C.; Parrish, M.J.; Ranivoharimanana, L.; Wyss, A.R. (2015). "Postcranial osteology of Azendohsaurus madagaskarensis (?Middle to Upper Triassic, Isalo Group, Madagascar) and its systematic position among stem archosaur reptiles". Bulletin of the American Museum of Natural History. 398: 1–126. doi:10.1206/amnb-899-00-1-126.1. hdl:2246/6624. ISSN 0003-0090. S2CID 86289421.
  2. ^ Brenon, P. (1972). The Geology of Madagascar. In: Battistini, R., Richard-Vindard, G. (eds) Biogeography and Ecology in Madagascar. Monographiae Biologicae, vol 21. Springer, Dordrecht. https://doi.org/10.1007/978-94-015-7159-3_2

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Isalo II

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Isalo II, also known as the Makay Formation, is an informal Triassic geological unit in Madagascar. It is described as "thick beds of mottled red or green...

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Mambachiton

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basal avemetatarsalian from the Middle/Upper Triassic Makay Formation (Isalo II beds) of Madagascar. The genus contains a single species, M. fiandohana...

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Isalo III Formation

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Middle Jurassic. The use of the term "Isalo III" is somewhat controversial as the two prior units Isalo I and II are Triassic cross-bedded sandstone units...

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Isalo National Park

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Isalo National Park is a National Park in the Ihorombe Region of Madagascar, in the southwestern corner of the Province of Fianarantsoa. The closest town...

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Rhynchosaur

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Formation Isalorhynchus I. genovefae Carnian  Madagascar Makay Formation (Isalo II) A hyperodapedontine occasionally referred to Hyperodapedon. Mesodapedon...

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Carnian

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Bed (Queensland, Australia) Dockum Group (Carnian - Norian)* (SW USA) “Isalo II” (late Ladinian – early Carnian)* (Madagascar) Ischigualasto Formation...

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Kongonaphon

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This fossil hails from the late Ladinian or early Carnian-age "basal Isalo II beds". As the first lagerpetid found in Africa, Kongonaphon extends the...

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Chiniquodon

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and the shape of the zygomatic process. Chiniquodon kalanoro is from the Isalo II Formation, Madagascar. This species is known from a mandible (holotype...

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Ornithopsis, is described from the Lower Cretaceous sediments from the Balve II locality (Germany) by Hornung, Sachs & Schwermann (2023), representing the...

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Ischigualasto Formation

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Oryctorhynchus, and the Wyoming species is Beesiiwo. Fossils from the "Isalo II" beds of Madagascar are broadly comparable to the Ischigualasto Formation...

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Makay Massif

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westwards into the Mozambique Channel. The massif's bedrock is principally Isalo II mudstones and sandstones, also known as the Makay Formation. The formation...

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2020 in archosaur paleontology

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Kongonaphon Gen. et sp. nov Valid Kammerer et al. Mid-to-Late Triassic Isalo II  Madagascar A member of the family Lagerpetidae. The type species is K...

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Azendohsaurus

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the Middle–Late Triassic Makay Formation, also referred to as Isalo II, a part of the Isalo "Group" in the Morondava Basin. Previously, the formation had...

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Triassic land vertebrate faunachrons

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(2005-06-01). "Studies on continental Late Triassic tetrapod biochronology. II. The Ischigualastian and a Carnian global correlation". Journal of South American...

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Menadon

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only species is Menadon besairiei. Fossils of Menadon were first found in Isalo II (the Makay Formation) of Madagascar, which preserves sediments from the...

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Isalorhynchus

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Malio River area. It was found in the Makay Formation (or Isalo II) of the Morondava Basin (or Isalo beds). It was first named by Eric Buffetaut in 1983 and...

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List of fossiliferous stratigraphic units in Madagascar

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Fossilworks.org Bemaraha Formation at Fossilworks.org Isalo III Formation at Fossilworks.org Isalo II Formation at Fossilworks.org Middle Sakamena Formation...

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Tiki Formation

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Formation, and the overlying lower Caturrita Formation of Brazil, the Isalo II Beds of Madagascar, Lossiemouth Sandstone of Scotland, and the lower Tecovas...

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Scaphiophryne gottlebei

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endemic to the Isalo Massif at an altitude of 700–1,000 m (2,300–3,300 ft) in the central part of southern Madagascar, including the Isalo National Park...

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Schizolaena isaloensis

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Sarcolaenaceae. It is endemic to Madagascar. The specific epithet refers to Isalo National Park, near where the species was identified. Schizolaena isaloensis...

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Perrierodendron occidentale

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from sea level to 1,000 m (3,300 ft) altitude. Some subpopulations are in Isalo and Zombitse-Vohibasia National Parks. Rabarimanarivo, M. (2020). "Perrierodendron...

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List of sauropodomorph type specimens

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Acrantophis dumerili

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forest floor of their native habitat.[citation needed] in London Zoo in Isalo National Park, Madagascar A. dumerili is found on Madagascar. The type locality...

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Uapaca bojeri

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of the tapia") between Antsirabe and Ambositra, the Itremo massif, and Isalo National Park. Within a broader sub-arid to sub-humid region, tapia woodland...

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Tanystropheus

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osteology of Azendohsaurus madagaskarensis (?Middle to Upper Triassic, Isalo Group, Madagascar) and its systematic position among stem archosaur reptiles"...

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Flora of Madagascar

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Perrierodendron quartzitorum

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species population is decreasing. Formerly, there were subpopulations in Isalo and Zombitse-Vohibasia National Parks, but, as of the IUCN species assessment...

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