# Kandreho Formation

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{{Short description|Early Jurassic geological formation of Madagascar}}
{{Infobox rockunit
| name           = Kandreho Formation
| period         = Toarcian
| age            = [Toarcian](/source/Toarcian)<br />~{{fossilrange|180|176}}
| image          = 
| imagesize      = 
| caption        = 
| type           = [Geological formation](/source/Geological_formation)
| prilithology   = [Marl](/source/Marl)y [limestone](/source/limestone)
| otherlithology = 
| unitof         = 
| subunits       = 
| underlies      = 
| overlies       = 
| thickness      = 
| namedfor      = [Kandreho](/source/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](/source/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](/source/Mahajanga_Province)
| country        = [Madagascar](/source/Madagascar)
| extent         = [Mahajanga Basin](/source/Mahajanga_Basin)
}}
The '''Kandreho Formation''' is an [Early Jurassic](/source/Early_Jurassic) (middle or late [Toarcian](/source/Toarcian)) [geological formation](/source/geological_formation) of the [Mahajanga Basin](/source/Mahajanga_Basin) of [Madagascar](/source/Madagascar). The [marl](/source/marl)y [limestone](/source/limestone)s of the formation were deposited in a subtidal [lagoon](/source/lagoon)al [environment](/source/depositional_environment). The formation overlies the ''[Bouleiceras](/source/Bouleiceras)'' and ''[Spiriferina](/source/Spiriferina)'' beds of the early Toarcian and has been correlated to the [Marrat Formation](/source/Marrat_Formation) of [Saudi Arabia](/source/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](/source/Teleosauridae) [thalattosuchian](/source/Thalattosuchia) as well as [bivalve](/source/bivalve)s and the [ammonite](/source/ammonite) ''[Nejdia](/source/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](/source/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](/source/Crocodylomorpha) of the Kandreho Formation
|-
!Genus
!Species
!Location
!Stratigraphic position
!Material
!Notes
!Image
|-
| [Teleosauridae](/source/Teleosauridae) Indet.
| Indeterminate
| [Behazonaty](/source/Behazonaty)
| [Toarcian](/source/Toarcian)
| Upper jaw fragment
| A [teleosaurid](/source/Teleosauridae) [thalattosuchian](/source/Thalattosuchia); originally known as ''"[Steneosaurus](/source/Steneosaurus)"''.
|
|-
|}

== See also ==
* [List of fossiliferous stratigraphic units in Madagascar](/source/List_of_fossiliferous_stratigraphic_units_in_Madagascar)
* [Geology of Madagascar](/source/Geology_of_Madagascar)
* [Isalo III Formation](/source/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](/source/Pal%C3%A4ontologische_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](/source/University_of_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

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Adapted from the Wikipedia article [Kandreho Formation](https://en.wikipedia.org/wiki/Kandreho_Formation) by Wikipedia contributors ([contributor history](https://en.wikipedia.org/wiki/Kandreho_Formation?action=history)). Available under [Creative Commons Attribution-ShareAlike 4.0 International](https://creativecommons.org/licenses/by-sa/4.0/). Changes may have been made.