Kandreho Formation

{{Short description|Early Jurassic geological formation of Madagascar}}

{{Infobox rockunit

| name = Kandreho Formation

| period = Toarcian

| age = Toarcian
~{{fossilrange|180|176}}

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| type = Geological formation

| prilithology = Marly limestone

| otherlithology =

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| 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

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| 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.{{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}} Fossils of the marine crocodylian "Steneosaurus" as well as bivalves and the ammonite Nejdia have been found in the formation.[https://paleobiodb.org/classic/displayCollResults?collection_no=132380 Behazonaty, SW of the basin of the Kelifely] at Fossilworks.orgBuffetaut et al., 1981, p.314 The name Kandreho Formation was proposed by Geiger in 2004.Geiger, 2004, p.125