[ Top ] [ Japanese ]

Matsukawa Formation Shinbori et al., 1950

Invalid synonym: Matsukawa Group, Kiyomoto Formation

• Type locality: Matsukawa, Uonuma city, Niigata prefecture
• Volcanic rocks
• early Miocene
• Intruded by: Rhyolite

• Sedimentary facies: Terrestrial
• Lithofacies (Upper): Conglomerate, Sandstone
• Lithofacies (Lower): Andesite lava, Lapilli tuff, Tuff breccia, Volcanic conglomerate
• Lithofacies (Minor): Rhyolite pumice tuff

• Thickness (Upper): ca. 400 m
• Thickness (Lower): 400 m
• Upper limit: Unconformity (Nishimyo Formation)
• Lower limit: Unconformity (Kamigongendoyama Complex, Kuromatagawa Granite)

• Distribution: Matsukawa - Tanaka - Aburuma river - Mount Shigematsu, Uonuma city, Niigata pref.; Asami river, Kiyomoto, Uonuma city, Niigata pref.

• Takahashi et al. (2004) Geology of the Suhara District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, AIST, 80p. (in Japanese with English abstract 4p.)
• Yanagisawa et al. (1986) Geology of the Ojiya District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, 177p. (in Japanese with English abstract 6p.)