“…The theoretical and practical value of organic matter study for revealing common ix x Introduction factors of forming commercial minerals in the ocean is universally recognized, primarily in oil formation (Vassoevich et aI, 1970(Vassoevich et aI, , 1972(Vassoevich et aI, , 1976Geodekyan et al, 1980Geodekyan et al, , 1985Trotzuk, 1979). The theoretical and practical value of organic matter study for revealing common ix x Introduction factors of forming commercial minerals in the ocean is universally recognized, primarily in oil formation (Vassoevich et aI, 1970(Vassoevich et aI, , 1972(Vassoevich et aI, , 1976Geodekyan et al, 1980Geodekyan et al, , 1985Trotzuk, 1979).…”