Earth and Planetary Sciences ETDs

Publication Date

Spring 5-23-1953


The field investigation for this report was initiated in October 1952 and was continued intermittently until February 1953. The area was mapped on the scale of 1/31680 with the aid of aerial photographs and Soil Conservation Service planimeteric base map 173. This scale was later enlargened to 1/15840. Rock and mineral specimens were studied with the aid of a hand lens, and the oil immersion method was used to identify some minerals. No thin sections were made. Sedimentary rocks were mapped to complete the geologic picture. No detailed sedimentary sections were measured as emphasis was placed on the Cenozoic igneous rocks and their relationship to each other sediments.

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

J. Paul Fitzsimmons

Third Committee Member

C.J. Perry



Document Type


JOHNSTON_EAST_GRANTS_RIDGE_figure 2.jpg (10132 kB)
Geologic Map of East Grants Ridge

Included in

Geology Commons