Goodner, David Charles2020-04-212020-04-211975-04-07https://hdl.handle.net/11299/212417A Thesis submitted to the faculty of the Graduate School of the University of Minnesota by David Charles Goodner in partial fulfillment of the requirements for the degree of Master of Science, April 1975.The late Cretaceous upper Frontier and Henefer Formations exposed near Coalville, Utah were deposited in a fluctuating set of freshwater, brackish, and marine environments. Sediment was derived from a western source area elevated during the Sevier and Laramide orogenies, pulsations of which are evidenced by unconformities within the Frontier and Henefer Formations in the Coalville area. A series of 6 marine transgressive-regressive sequences during deposition of the Upton Sandstone Member of the Frontier Formation is hypothesized based on a Simpson species diversity study within the benthonic community of ostracodes and foraminifers. The Simpson diversity index ranges from 1.7 to 9.2 for the beds of the Upton Sandstone Member of the Frontier Formation.enPlan As (thesis-based master's degrees)Department of Earth and Environmental SciencesUniversity of Minnesota DuluthMaster of ScienceMaster of Science in GeologyThesis or Dissertation