{{Short description|Early Jurassic geological formation of Madagascar}} {{Infobox rockunit | name = Kandreho Formation | period = Toarcian | age = Toarcian<br />~{{fossilrange|180|176}} | image = | imagesize = | caption = | type = Geological formation | prilithology = Marly limestone | otherlithology = | unitof = | subunits = | underlies = | overlies = | thickness = | namedfor = Kandreho | namedby = Geiger | year_ts = 2004 | area = | map = {{Location map+ | Madagascar | relief = 1 | width = 160 | float = center | caption = Outcrop of the formation in Madagascar | places = Kandreho {{Location map~ | Madagascar | lat_deg = -17.5 | lon_deg = 45.3 | mark = Blue pog.svg | marksize = 12 }} }} | map_caption = | location = | coordinates = {{coord|17.5|S|45.3|E|display=inline,title}} | paleocoordinates = {{coord|22.3|S|24.0|E|display=inline}} | region = Mahajanga Province | country = Madagascar | extent = Mahajanga Basin }} The '''Kandreho Formation''' is an Early Jurassic (middle or late Toarcian) geological formation of the Mahajanga Basin of Madagascar. The marly limestones of the formation were deposited in a subtidal lagoonal environment. The formation overlies the ''Bouleiceras'' and ''Spiriferina'' beds of the early Toarcian and has been correlated to the Marrat Formation of Saudi Arabia.<ref name=":0">{{Cite journal |last=Buffetaut |first=Eric |last2=Termier |first2=Geneviéve |last3=Termier |first3=Henri |date=1981 |title=A teleosaurid (Crocodylia, Mesosuchia) from the Toarcian of Madagascar and its palaeobiogeographical significance |url=http://doc.rero.ch/record/203076/files/PAL_E3919.pdf |journal=Paläontologische Zeitschrift |volume=55 |issue=3-4 |pages=313–319 |doi=10.1007/bf02988145 |issn=0031-0220}}</ref> Fossils of the marine teleosaurid thalattosuchian as well as bivalves and the ammonite ''Nejdia'' have been found in the formation.<ref>[https://paleobiodb.org/classic/displayCollResults?collection_no=132380 Behazonaty, SW of the basin of the Kelifely] at Fossilworks.org</ref><ref name=Buffetaut1981_p314>Buffetaut et al., 1981, p.314</ref> The name Kandreho Formation was proposed by Geiger in 2004.<ref name=Geiger2004_p125>Geiger, 2004, p.125</ref>
== Fossill content ==
{{paleobiota-key-compact}}
=== Crocodylomorphs === {| class="wikitable" align="center" |- ! colspan="7" align="center" | Crocodylomorphs of the Kandreho Formation |- !Genus !Species !Location !Stratigraphic position !Material !Notes !Image |- | Teleosauridae Indet. | Indeterminate | Behazonaty | Toarcian | Upper jaw fragment | A teleosaurid thalattosuchian; originally known as ''"Steneosaurus"''. | |- |}
== See also == * List of fossiliferous stratigraphic units in Madagascar * Geology of Madagascar * Isalo III Formation
== References == {{Reflist}}
=== Bibliography === * {{citation |last1=Buffetaut |first1=É. |last2=Termier |first2=G. |last3=Termier |first3=H. |year=1981 |title=A teleosaurid (Crocodylia, Mesosuchia) from the Toarcian of Madagascar and its palaeobiogeographical significance |url=http://doc.rero.ch/record/203076/files/PAL_E3919.pdf |journal=Paläontologische Zeitschrift |volume=55 |issue=3–4 |pages=313–319 |doi=10.1007/BF02988145 |bibcode=1981PalZ...55..313B |accessdate=2018-08-30 |author1-link=Éric Buffetaut }} * {{citation |last=Geiger |first=Markus |year=2004 |title=Sedimentary and stratal patterns in Jurassic successions of western Madagascar - Facies, stratigraphy, and architecture of Gondwana breakup and drift sequences (PhD thesis) |url=http://doc.rero.ch/record/203076/files/PAL_E3919.pdf |publisher=Universität Bremen |pages=1–179 |accessdate=2018-08-30}}
Category:Geologic formations of Madagascar Category:Jurassic System of Africa Category:Early Jurassic Africa Category:Jurassic Madagascar Category:Toarcian Stage Category:Limestone formations Category:Lagoonal deposits Category:Paleontology in Madagascar