資料・解説
5万分の1地質図幅「豊橋」地域の秩父帯チャートから産する三畳紀放散虫化石
2004 年 55 巻 9-10 号 p. 303-334
詳細
2004 年 55 巻 9-10 号 p. 303-334
Triassic radiolarians were detected from 68 samples of chert of the Chichibu Belt in Toyohashi district, Aichi Prefecture, Southwest Japan. 55 species belonging to 33 genera are identified, and are shown in plates with undescribed morphotypes as a database for further study. Based on Triassic radiolarian biostratigraphy presented by Sugiyama (1997), the geologic age of the examined chert samples ranges from late Early Triassic to Late Triassic.
