Berivotra Formation
{{Short description|Geological formation in Madagascar}}
{{other places|Berivotra (disambiguation)}}
{{Infobox rockunit
| name = Berivotra Formation
| image =Masiakasaurus knopfleri theropod dinosaur (Maevarana Formation, Upper Cretaceous; near Berivotra, northern Madagascar) 2 (15415407082).jpg
| caption = Masiakasaurus knopfleri theropod dinosaur
| type = Geological formation
| period = Maastrichtian
| age = Maastrichtian
| prilithology = Claystone
| otherlithology =
| namedfor = Berivotra, Marovoay
| namedby =
| region = Boeny, Mahajanga Province
| country = {{MAD}}
| coordinates = {{coord|15.9|S|46.6|E|display=inline,title}}
| paleocoordinates = {{coord|30.1|S|38.4|E|display=inline}}
| unitof =
| subunits =
| underlies =
| overlies = Maevarano Formation
| thickness =
| extent = Mahajanga Basin
| area =
| map = {{Location map+ | Madagascar
| relief = 1
| width = 160
| float = center
| caption = Location of the formation in Madagascar
| places =
{{Location map~ | Madagascar
| lat_deg = -15.9
| lon_deg = 46.6
| mark = Lightgreen pog.svg
| marksize = 12
}}
}}
| map_caption =
}}
The Berivotra Formation is a Maastrichtian sedimentary formation of the Mahajanga Basin in Boeny, Madagascar. The claystones of the formation were deposited in a shallow marine environment. The Berivotra Formation overlies the fossil-rich Maevarano Formation, in which more fossils of Beelzebufo, also recovered from the Berivotra Formation, have been found. Many shark and ray teeth were collected by surface prospecting on outcrops of the Berivotra Formation, which is readily distinguished by its yellowish grey to pale olive colour, as opposed to the white and green fluvial sandstones that form the upper {{convert|15|to|20|m|ft}} of the underlying Maevarano Formation.
Fossil content
The following fossils have been reported from the formation:[https://paleobiodb.org/classic/displayCollResults?collection_no=144918 Berivotra] at Fossilworks.org
{{divcol|colwidth=20em}}
- Beelzebufo ampinga
- Cretolamna appendiculata, C. maroccana
- Serratolamna serrata
- Squalicorax kaupi, S. pristodontus
- Carcharias sp.
- Parapalaeobates sp.
- Pristiophorus sp.
- cf. Brachyrhizodus sp.
{{colend}}
See also
References
{{reflist}}
Further reading
- M. D. Gottfried, J. A. Rabarison, and L. L. Randriamiarimanana. 2001. Late Cretaceous elasmobranchs from the Mahajanga Basin of Madagascar. Cretaceous Research 22:491-496
Category:Geologic formations of Madagascar
Category:Upper Cretaceous Series of Africa
Category:Cretaceous Madagascar
Category:Shallow marine deposits