抄録
Tsugaru district in Aomori Prefecture is kown as one of the district of rich oil seepages, but not yet discovered oil field. Through the writer's geological survey for several years, and the synthetic considerations with the results of geophisical survey and explorating wells, became clear the geological sequences and correlations in each area of Tsugaru district. According to the relations between stratigraphy, structures of basement and Tertiary rocks, and changing of lithological and biological facies, the outline of orogenic evolution of oil-bearing Tertiary in Tsugaru district was able to elucidate.
