Earth and Planetary Sciences ETDs
Publication Date
5-29-1963
Abstract
The Olalla stock is located in the Okanagan Mountains of south-central British Columbia, about 20 miles north of the international boundary. It occupies approximately 6 square miles and consists of late Mesozoic mafic and ultramafic rocks and subordinate alkalic rocks, which have intruded previously folded and metamorphosed sediments of the Triassic (?) Shoemaker Foundation.
The rocks of the stock may be broadly grouped into two major categories: (1) those formed from the differentiation of a crystallizing magma that probably entered during the Nevadan orogeny, and (2) those formed by metasomatic replacement of pyroxenite. The rocks of the first category are, in order of age: augite, pyroxenite, monzonite, ayenodiorite, and granite. Syenite is the only rock belonging to the second category.
Degree Name
Earth and Planetary Sciences
Level of Degree
Masters
Department Name
Department of Earth and Planetary Sciences
First Committee Member (Chair)
Wolfgang Eugene Elston
Second Committee Member
Abraham Rosenzweig
Third Committee Member
J. Paul Fitzsimmons
Language
English
Document Type
Thesis
Recommended Citation
Sturdevant, James Anton. "Petrography of the Olalla Stock, Okanagan Mountains, British Columbia." (1963). https://digitalrepository.unm.edu/eps_etds/220
Table 2. Modal analysis of the igneous rocks
sturdevant_fig3.tif (63112 kB)
Figure 3. General outcrop pattern of igneous rocks, south-central British Columbia
sturdevant_fig4_25.jpg (4194 kB)
Figure 4. Geologic Map and Structure Section of the Olalla Stock, British Columbia - 25% resolution
sturdevant_fig4.tif (239595 kB)
Figure 4. Geologic Map and Structure Section of the Olalla Stock, British Columbia
