[ Top ] [ Japanese ]

Hirosawa Conglomerate Osawa et al., 2016

• Type locality: east of Momiyama pass, Hirosawa town, Kiryu city, Gunma prefecture
• Coherent formation
• early Miocene

• Sedimentary facies: Fluvial
• Lithofacies: Conglomerate
• Lithofacies (Minor): Sandstone
• Sedimentary structures: Graded bedding, Imbrication

• Thickness: Several - 80 m or thicker
• Lower limit: Unconformity (Kanayama Welded Tuff, Gyodosan Complex)

• Distribution: east of Momiyama pass, Hirosawa town, Kiryu city, Gunma pref.; Sugashio pass, Hirosawa town, Kiryu city - Sugashio town, Ota city, Gunma pref.

• Ito et al. (2022) Geology of the Kiryu and Ashikaga District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, AIST, 101p. (in Japanese with English abstract 4p.)