Fossil foraminifera for petroleum exploration in Japan

－A story about Japanese petroleum exploration in the past（part 4）

Abstract

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.