後期猿丸階における火山活動,とくに古飯繩火山活動について : 北部フォッサマグナの下部最新統火山岩類

概要

論文の詳細を見る
In the last Sarumaru stage in the early Pleistocene, volcanic activities in Nagano district of the northern Fossa Magna district produced various kinds of volcanic rocks and their pyroclastics, ranging from high-alumina basalts, through tholeiitic basalts and andesites to calc-alkalic andesite and rhyolites. Since they formed the basement of Iizuna Volcano, and were also very intimately related with it, they are called here the Paleo-Iizuna volcanics. Similar volcanics are also distributed to the north-east of Iizuna volcano, thus forming the basement of Madarao Volcano. Their stratigraphic relation with the Sarumaru formation and Toyono formation, and their geologic significance are discussed in detail.
地学団体研究会の論文
1965-05-30