Kuwajima Formation
From Wikipedia, the free encyclopedia
The Kuwajima Formation is an Early Cretaceous geologic formation in Japan. Its precise age is uncertain due to a lack of identifying fossils, and it was previously considered likely Valanginian to Hauterivian in age.[1] However, it is now considered to probably be Barremian in age.[2] Dinosaurs and other vertebrates has been recovered from the Kaseki-kabe "Fossil-bluff" locality in the uppermost part of the formation.[3]
Quick Facts Unit of, Sub-units ...
Kuwajima Formation | |
---|---|
Stratigraphic range: Barremian | |
Unit of | Tetori Group |
Sub-units | Lower Member, Upper Member |
Underlies | Akaiwa Formation |
Overlies | Gomijima Formation |
Lithology | |
Primary | Sandstone, Mudstone |
Location | |
Country | Japan |
Close
The multituberculate mammals Hakusanobaatar matsuoi and Tedoribaatar reini are known from the Kuwajima Formation.[4] A member of Tritylodontidae, Montirictus kuwajimaensis, has also been recovered from the unit.[5]