Andaikhudag Formation

Andaikhudag Formation
Stratigraphic range: Hauterivian-Barremian ~132–125 Ma PreꞒ Ꞓ O S D C P T J K Pg N
Type	Geological formation
Lithology
Primary	Shale
Other	Sandstone
Location
Coordinates	46°00′N 99°36′E / 46.0°N 99.6°E / 46.0; 99.6
Approximate paleocoordinates	47°12′N 100°18′E / 47.2°N 100.3°E / 47.2; 100.3
Region	Bayankhongor Province
Country	Mongolia
Andaikhudag Formation (Mongolia)

The Andaikhudag Formation, in older literature referred to as Unduruh Formation or Ondorukhaa Formation, is an Early Cretaceous (Hauterivian to Barremian) geologic formation in Mongolia.^[1] Dinosaur remains diagnostic to the genus level are among the fossils that have been recovered from the formation.^[2]