花崗礫岩からみた日本の3つの造山運動

概要

論文の詳細を見る
That orogenetic movements corresponding to the Alps and Variscan held in Japanese islands is doubtless. The former has been called under the name of Hidaka orogenesis, while for the latter, the name of Abean orogenetic movement is newly proposed.In this paper, it is briefly presented how those mountains in those days became to high and were eroded away from the cores and how those erosional products were deposited in front. Those deposits always contain a large amount of granitic pebbles and show to be typical molasse type of conglomerates. It is uncertain about the orogenesis held prior to the Variscan movements in Japanese islands, but the presence of granite conglomerates in the Upper Devonian Tobigamori series with Cyrtospirifer and Sinospirifer fauna, is worthy of note. From the various reasons, either from the view points of volcanic activities held in Japan during the time ranging from the Silurian to Early Devonian, or probable existence of hiatus in the preUpper Middle Devonian and Upper Devonian in North Japan, I am now inclined to believe the possibility that some type of orogenic movement corresponding to Caledonian was surely held in Japan.
地学団体研究会の論文
1960-01-25