[F] Oshih-Ondai Sair Basin - Mongolia
The Oshih and Ondai Sair basins are very probably continuous and form one basin.
The Oshih-Ondai Sair basin is the oldest true basin found by us in Mongolia; its sandstones rest directly upon the strongly disturbed old rocks that have passed through one or more mountain-bearing revolutions.
Asiatosaurus mongoliensis - Sauropoda Nomina Dubia - Cretaceous Early Valanginian Hauterivian Barremian Aptian
Protiguanodon mongoliensis - Neoceratopia Psittacosauridae - Cretaceous Early Aptian Albian