Ankazomihaboka Formation

TypeGeological formation

UnderliesMarovoay Beds

OverliesBasalt

PrimaryClaystone, sandstone

Ankazomihaboka Formation
Stratigraphic range: Coniacian ~89–86 Ma PreꞒ Ꞓ O S D C P T J K Pg N ↓
Type	Geological formation
Underlies	Marovoay Beds
Overlies	Basalt
Lithology
Primary	Claystone, sandstone
Location
Coordinates	16°12′S 46°42′E / 16.2°S 46.7°E / -16.2; 46.7
Approximate paleocoordinates	34°54′S 37°48′E / 34.9°S 37.8°E / -34.9; 37.8
Region	Boeny, Mahajanga Province
Country	Madagascar
Extent	Mahajanga Basin
class=notpageimage| Location of the formation in Madagascar

The Ankazomihaboka Formation is a Coniacian geologic formation in the Mahajanga Basin of northwestern Madagascar. The formation comprises claystones and sandstones deposited in a fluvial to lacustrine environment.^[1] The formation is overlain by the Marovoay Beds and overlies basalt.^[2]

Dinosaur remains diagnostic to the genus level are among the fossils that have been recovered from the formation.^[3]