Diatoms have long been considered by many writers to have been the source of the California oil. Recently it has been suggested that Foraminifera, whose tests are found in abundance in rocks closely associated with the oil, may have been an important source of the oil. Recent studies of the life history of the Foraminifera show that a very large proportion of the tests present in the strata as fossils may have been empty of animal tissue at the time of burial. This and other related facts make it appear probable that Foraminifera have been of less importance than diatoms as sources of the petroleum of California.

First Page Preview

First page PDF preview
You do not have access to this content, please speak to your institutional administrator if you feel you should have access.