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Title :Late Silurian radiolarians from a radiolarite pebble within a conglomerate, Kotaki, Itoigawa, Niigata Prefecture, central Japan
Authors :Ito, Tsuyoshi
Kurihara, Toshiyuki
Hakoiwa, Hiroaki
Ibaraki, Yousuke
Matsuoka, Atsushi
Publisher :新潟大学理学部
Issue Date :Mar-2017
Journal Title :Science reports of Niigata University. (Geology)
Volume :32
Start Page :1
End Page :14
ISSN :1349-1237
Abstract :This article describes radiolarians from a radiolarite pebble within conglomerate from a float block that was collected along the banks of the Kotaki River in the Kotaki area, Itoigawa, Niigata Prefecture, central Japan. Futobari morishitai Furutani, Inaniguttidae gen. et sp. indet., and Palaeoscenidiidae gen. et sp. indet. were recognized on etched surfaces of the pebble. Pseudospongoprunum sp., Zadrappolus sp., and Rotasphaera sp. were discovered in residues obtained by chemically treating the conglomerate. This assemblage may be compared to the assemblage around the boundary between the Pseudospongoprunum tauversi to Futobari solidus-Zadrappolus tenuis assemblage zones and corresponds to the late Silurian. This report marks the first identification of Silurian radiolarians in Niigata Prefecture, which also makes them the oldest recorded fossils from the prefecture. The clasts are also the oldest recorded radiolarian-bearing clasts within conglomerates of the Japanese Islands and the Korean Peninsula.
Keywords :conglomerate
etched surface
Silurian radiolaria
Jurassic
Kuruma Group
Niigata Prefecture
Japanese Islands
Korean Peninsula
Type Local :紀要論文
Language :eng
Format :application/pdf
URI :http://hdl.handle.net/10191/47654
fullTextURL :http://dspace.lib.niigata-u.ac.jp/dspace/bitstream/10191/47654/1/32_1-14.pdf
Appears in Collections:02 Science reports of Niigata University. (Geology)

Please use this identifier to cite or link to this item: http://hdl.handle.net/10191/47654