石油開発における有孔虫化石

－昔の石油開発あれこれ（4）－

抄録

Four geologists（Dr. Ozawa, Mr. Nakamura, Mr. Yamanouchi and Dr. Ooinomikado）made a great contribution to the application of small foraminiferal fossils for petroleum exploration in Japanese oil companies at the early Showa era. A part of their achievements is briefly presented in this paper.