Earth and Planetary Sciences ETDs

Publication Date



The segment of the South Fork thrust in the Belknap ranch area contains rocks representative of the Upper Jurassic, Lower Cretaceous and Upper Cretaceous. The thrust plate occupies 75 percent of the mapped area. Approximately 3,500 feet of predominantly marine rocks comprise the detachment thrust and about 15 percent of the exposed rocks of the thrust plate is sandstone and conglomerate. All the rock units present in the thrust plate crop out beyond the edge of the over-riding mass except the Sundance and Morrison formations. Approximately 4,600 feet of geologic section is exposed of drilled in the mapped area. The rocks range in age from Pennsylvanian to Recent.

Degree Name

Earth and Planetary Sciences

Level of Degree


Department Name

Department of Earth and Planetary Sciences

First Committee Member (Chair)

Vincent Cooper Kelley

Second Committee Member


Third Committee Member

Roger Yates Anderson



Document Type


deurmyer_fig3.tif (530255 kB)
Geologic Map of the Belknap Ranch Area

deurmyer_fig4.1.tif (218203 kB)
Fig4. Stratigraphic section of the Cretaceous, Jurassic, Triassic, Permian and Pennsylvanian rocks of the Belknap ranch area

deurmyer_fig8.tif (4138 kB)
Fig8. structure sections of the Belknap Ranch area