Date of Award


Degree Type

Bachelors Thesis

Degree Name

Bachelor of Science in Geological Engineering



First Advisor

Dr. E. S. Perry

Second Advisor

Mr. Alvin M. Hanson


The use of foraminifera in the determination of geologic age, and in the correlation of strata, is one of the most important techniques in oil field stratigraphic studies. The petroleum industry in many regions relies on these microscopic life forms to determine the positions of oil-bearing horizons and to determine the tops of beds. In northern Montana the Colorado group of strata, a series of about 2,000 feet of dense, dark similar shales, is known to contain foraminifers.