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Full-Text Articles in Physical Sciences and Mathematics
Geology Of The Wildcat Hills, Utah, Ronald C. Howes
Geology Of The Wildcat Hills, Utah, Ronald C. Howes
All Graduate Theses and Dissertations, Spring 1920 to Summer 2023
The Wildcat Hills, located in Curlew Valley of northwestern Utah, are composed of a series of late Tertiary extrusive and dike rocks. Five volcanic rock types have been identified: an andesite, a rhyolite, a perlite, a basalt, and a welded tuff. Hydration of obsidian pellets contained in the flows has produced some of the perlite. Diatremes in the andesite attest to the high-volatile content and the explosive extrusion of some of the lavas. A compound basalt neck indicates that basalt was extruded at the Wildcat Hills and is not an erosional remnant of the basalt flow from the base of …
Tertiary Igneous Rocks Of Northeastern Cache Valley, Idaho, Parry D. Willard
Tertiary Igneous Rocks Of Northeastern Cache Valley, Idaho, Parry D. Willard
All Graduate Theses and Dissertations, Spring 1920 to Summer 2023
The tuffs and limestones of the Tertiary Salt Lake Formation in northeastern Cache Valley, Franklin County, Idaho, are intruded by basic and intermediate igneous dikes and sills. The Tertiary intrusives are exposed in an area 10 miles long and 2 miles wide between Bear River and Maple Creek in the foothills of the Bear River Range east of Preston, Idaho. They trend north-northwest. The intrusives are mostly diabase but include a small body of syenodiorite and several small andesite dikes. The intrusives seem to be emplaced along early Basin and Range faults. They are limited to the Cache Valley Member …