Robuta

https://gbank.gsj.jp/geolis/geolis_link/200000652/en So-called olistolith limestone in the Lower Cretaceous Lower Yezo Group, Hokkaido, Japan - Features... so called in the lower cretaceous yezo group hokkaido japan https://gbank.gsj.jp/geolis/geolis_link/199503750/en Radiolarian fossils from the Lower Yezo Group (Cretaceous), Hokkaido, Japan (abs.) from the yezo group hokkaido japan radiolarian fossils