Natural Hokkaido Amber

Cretaceous Aptian

Yezo Group





extract from : Earth History of Asia- II October 31 - November 3, Niigata, Japan


"The Yezo Group is exposed in a belt roughly 1200 km long from Sakhalin Island to southern Hokkaido and consists of a thick Aptian to Paleocene fore-arc silicoclastic sequence. Amber-concentrated strata are intercalated in the lowest part of the Yezo Group in Nakagawaarea, northern Hokkaido, Japan. "

Japanese Fossil Cr