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Wagakunisan Metamorphic Rocks Miyazaki et al., 1992

• Type locality: Mount Wagakuni, Kasama city - Ishioka city, Ibaraki prefecture
• Low P/T metamorphic rocks
• Protolith: Kasama Formation
• Deposition: Late Jurassic - Early Cretaceous
• Metamorphism: Late Cretaceous?
• Correlation: Ryoke Metamorphic Rocks
• Correlation (Upper): Kasama Unit
• Correlation (Lower): Tsukuba Metamorphic Rocks
• Intruded by: Inada Granite, Kabasan Granite

• Metamorphic facies (Cordierite isograd): 0.15 - 0.31 GPa, 400 - 580 degrees Celsius
• Lithofacies (Upper): Mélange facies
• Lithofacies (Middle): Coherent facies
• Lithofacies (Lower): Coherent facies
• Lithofacies (Protolith, Upper, Main): Mudstone, Mudstone-dominant interbedded sandstone and mudstone
• Lithofacies (Protolith, Upper, Minor): Chert, Limestone
• Lithofacies (Protolith, Middle): Sandstone, Sandstone-dominant interbedded sandstone and mudstone
• Lithofacies (Protolith, Lower): Mudstone, Mudstone-dominant interbedded sandstone and mudstone
• Lithofacies (Biotite zone): Biotite slate, Biotite schist
• Lithofacies (Cordierite zone): K-feldspar-cordierite-biotite schist, K-feldspar-cordierite-biotite hornfels

• Thickness (Apparent): 6,500 m or thicker

• Distribution: Dorokujin pass, Kasama city - Ishioka city, Ibaraki pref.; Yamazaki, Iwama, Kasama city, Ibaraki pref.; Mount Wagakunisan, Kasama city, Ibaraki pref.; Itajiki, Iwase, Sakuragawa city, Ibaraki pref.; Maie, Ishioka city, Ibaraki pref.; Amabikikannon temple, Motoki, Sakuragawa city, Ibaraki pref.

• Takahashi et al. (2011) Jour. Geol. Soc. Japan, vol.117, Supplement, pp.21-31 DOI
• Miyazaki et al. (1996) Geology of the Makabe District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, 103p. (in Japanese with English abstract 4p.)