Yugashima Propylites

Type locality: Yugashima hot spring - Yugashima mine, Izu city, Shizuoka prefecture
Volcanic rocks
Miocene
Intruded by: Diorite porphyry, Andesite, Dacite, Biotite rhyolite

Lithofacies (Andesite): Pigeonite series
Lithofacies (Upper): Andesite lava, Tuff breccia, Tuff
Lithofacies (Lower): Basalt lava, Tuff breccia, Tuff
Lithofacies (Minor): Sandstone, Conglomerate, Shale

Thickness: 160 m or thicker
Upper limit: Transitional (Shuzenji White Tuffs), Unconformity (Nekko Green Andesitic Bed, Omi White Tuffs, Kano Andesites, Koshimoda Andesites, Tanaba volcano)

Yugashima Group
[ Upper ]
~~~~~~~~~~~~~~
Shuzenji White Tuffs
--------------
Yugashima Propylites
?--?--?--?--?-
[ Lower ]

------ Conformity, ~~~~~~ Unconformity, ~~~--- Local unconformity, '''/,, Interfingered, :::::: Fault, /--/-- Thrust, +__+__ Ground surface, ?--?-- Unknown

Distribution: Yugashima hot spring - Yugashima mine - Nekko - Seigoshi mine, Izu city, Shizuoka pref.; Ugusu - Ogusu, Nishiizu city, Kamo county, Shizuoka pref.; Ohito, Izunokuni city, Shizuoka pref.; Nekko pass, Nishiizu city, Kamo county - Izu city, Shizuoka pref.
Fossils: Brachiopods, Corals, Bryozoans
Fossils (Shellfishes): Barbatia sp., Chlamys sp., Conus cf. tokunagai, Corbicula cf. matusitai, Erronea? sp., Glycymeris sp., Nemocardium sp., Ostrea sp., Pillucina? sp., Umitake? sp.

Sawamura (1955) Shuzenji, Explanatory Text of the Geological Map of Japan, Scale 1:50,000, Geological Survey of Japan, 47p. (in Japanese with English abstract 4p.)