2024-03-29T09:18:24Z
https://soar-ir.repo.nii.ac.jp/oai
oai:soar-ir.repo.nii.ac.jp:00012042
2023-03-08T01:54:01Z
1169:1171:1172:1186
美濃帯根尾―和泉地域の左門岳ユニットから産出したトリアス紀およびジュラ紀の放散虫化石群集
Trlassic and Jurassic radiolarian assemblages from the Samondake Unit of the Mino Terrane in the Neo-Izumi area, central Japan
小林, 祐哉
radiolarians
Jurassic
Samondake Unit
Mino Terrane
melange
subduction comple
The Samondake Unit of the Mino Terrane in central Japan is characterized by a large quantity of sandstone. The Samondake Unit in the Neo-Izumi area is divided into the Subunit A and Subunit B on the basis of features in lithology, structure and deformation. The Subunit A is situated structurally higher than the Subunit B, and they are in fault contact each other. Radiolarian age of the Samondake Unit ranges from Middle Triassic to middle Middle Jurassic time. However middle Middle Jurassic radiolarians which characterize the Tricolocapsa plicarum zone (Matsuoka, 1995) are obtained from siliceous mudstone and mudstone of both Subunit A and B, early Middle Jurassic radiolarians which characterize the Laxtorum(?) jurassicum zone are obtained from only some siliceous mudstone of the Subunit A. Both Subunit A and B are considered to have been formed in the subduction accretion process on the basis of the ages and structural relationship of the two units.
Article
信州大学理学部紀要 33(1): 27-63(1998)
信州大学理学部
1998-10-30
jpn
departmental bulletin paper
VoR
http://hdl.handle.net/10091/10654
https://soar-ir.repo.nii.ac.jp/records/12042
0583-063X
AA00697923
信州大学理学部紀要
33
1
27
63
https://soar-ir.repo.nii.ac.jp/record/12042/files/Science33-01-04.pdf
application/pdf
13.6 MB
2015-09-28