Date of Award

January 2018

Document Type


Degree Name

Master of Science (MS)



First Advisor

Stephan Nordeng


Results from source rock analysis and sequence stratigraphy techniques suggest the lower Tyler Formation in McKenzie County, North Dakota is a deltaic dominated environmental system. There is a complex relationship between marine and terrestrial deposition. The source rock analysis performed on seven key wells showed a majority of the samples consist of type III terrestrial kerogen. Five of those wells also indicated a type II marine kerogen. The sequence stratigraphy techniques applied showed the three high gamma ray shales marked high stand system tracts. The two paleosol facies present in the lower Tyler Formation overlie marine shales suggesting rapid sea level changes during the Early Pennsylvanian period. Marine brachiopods and lacustrine ostracods present in the Tyler cores also indicate a deltaic environment.