抄録
In order to acquire the knowledge on the source rock of petroleum, the writer has carried out the chemical analyses on the rock samples of the Tertiary sediments developed in the neighbourhood of Yashima, Hitane and Momoyake at the eastern foot of Chokai Volcano, Akita Prefecture, and has determined the extractive organic constituents of the fine grained clastic sediments, so-called “black shale” and “hard shale”, Moreover he has studied on the relationship between the stratigraphic distribution of the organic constituents and the source rocks themselves.
