It has coastlines on the Sea of Japan (to the west of the island), the Sea of Okhotsk (to the north), and the Pacific Ocean (to the east). The center of the island is mountainous, with volcanic plateaux.

Let's go back a little in history and look at how Hokkaido arrived at its current form. Some 80 million years ago when dinosaurs had dominion over the earth, rather than being one island, Hokkaido was scattered over an enormous area of thousands of kilometers.

Jan 1, 2016 · Hokkaido is the northernmost of the four main islands of Japan and lies between Honshu Island to the SW, the neighbouring far-east Russian territories such as Sakhalin Island to the north, Primorye (Sikhote-Alin) to the west and the Kuril islands to the east.

Jan 1, 1982 · GEOLOGICAL EVOLUTION OF HOKKAIDO, JAPAN 203 cally found in the Oshima Peninsula, which are divided into two groups of early Cretaceous (Kawano & Ueda, 1966) and Miocene ages respectively (Nozawa, 1975; Shibata & Yamada, 1978).

During the 4.6 billion-year history of the earth, Hokkaido has been transformed dramatically. The mountains, seas, rivers, lakes, plains and forests we see and the animals and plants that live there have come into being through along succession of historical events.

Jun 2, 2016 · Volcanoes of Hokkaido (52) Hokkaido is the northernmost of Japan's 4 main islands. Tectonically, it was formed by the collision of the Kuril Volcanic Arc with the Northeast Japan Volcanic Arc at the central part of Hokkaido about during the …

May 30, 1998 · This study is the first integrated geological and geophysical investigation of the Hidaka Collision Zone in southern Central Hokkaido, Japan, which shows complex collision tectonics with a westward vergence.

Feb 3, 2020 · Hokkaido lacks most of the Paleozoic history recognized in Honshu, Shikoku, Kyushu, and the Ryukyu Islands to the south and its geology reflects the Cenozoic development of two convergent domains with volcanic arcs, their approach, and eventual collision.

The Cretaceous Idonnappu Belt, located along the western Hidaka Mountains of central Hokkaido Island in Japan, records evidence of west to northwest directed underthrusting of oceanic crust.

Geology guide Nature of Sapporo 2nd edition, Chigaku Dantai Kenkyukai Sapporo-shibu ed., Hokkaido University Press, 265p. (1984), in Japanese 1044-01111-7786