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Higher I Terrace Deposits

Invalid synonym: Yamamawari Formation

• Type locality: Yamamawari, Izumo city, Shimane prefecture
• Coherent formation
• Pleistocene
• Correlation: Higher I Terrace Deposits (Yabigawa river), Hinomisaki Terrace Deposit

• Sedimentary facies: Lake coast deposits, River bed deposits, Delta deposits
• Sedimentary facies (Minor): Lacustrine
• Lithofacies: Conglomerate, Sands
• Lithofacies (Minor): Clay
• Sedimentary structures: Wave cross-stratification, Trough cross-stratification, Planar cross-stratification
• Sedimentary structures (Minor): Parallel stratification

• Thickness: ca. 20 - 30 m
• Upper limit: Unconformity (Higher III Terrace Deposits, SK)
• Lower limit: Unconformity

• Distribution: Yamamawari, Izumo city, Shimane pref.; Kamihonjo town - Sakamotoshimo - Asahinomori - Mukaimura, Matsue city, Shimane pref.

• Kano et al. (1994) Geology of the Matsue District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, 126p. (in Japanese with English abstract 5p.)
• Kano et al. (1991) Geology of the Imaichi District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, 79p. (in Japanese with English abstract 5p.)
• Kano and Yoshida (1985) Geology of the Sakaiminato District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, 57p. (in Japanese with English abstract 5p.)