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Ikomayama Gabbro Miyachi et al., 1998

• Type locality: Mount Ikomayama, Nara prefecture - Osaka prefecture
• Plutonic rocks
• Cretaceous (192, 169 Ma, Sm-Nd)
• Intruded by: Ishikiri Tonalite, Granodiorite porphyry dikes, Quartz diorite porphyry dikes

• Sedimentary facies: Island arc, Continental-margin arc, or Intracontinental
• Lithofacies: Hornblende gabbro, Pyroxene hornblende gabbronorite
• Lithofacies (Minor): Olivine-bearing gabbronorite

• Distribution (East - West): 5.2 km
• Distribution (South - North): 4.5 km

• Distribution: Mount Ikomayama, Nara pref. - Osaka pref.; Nishihata town, Ikoma city, Nara pref.; Higashitoyoura town, Higashiosaka city, Osaka pref.

• Nishioka et al. (2001) Geology of the Sakurai District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, 141p. (in Japanese with English abstract 5p.)
• Miyachi et al. (2001) Geology of the Osaka-Tohokubu District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, 130p. (in Japanese with English abstract 6p.)
• Miyachi et al. (1998) Geology of the Osaka-Tonambu District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, 113p. (in Japanese with English abstract 5p.)