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Books Books 1 - 2 of 2 on In the north half of the dome numerous intrusive and extrusive masses have been forced....
" In the north half of the dome numerous intrusive and extrusive masses have been forced up through the Cretaceous and Tertiary rocks and cap these rocks in several localities. The exposures of leucite range from talus-covered hills, isolated volcanic necks,... "
Bulletin - United States Geological Survey - Page 115
by Geological Survey (U.S.) - 1910
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Congressional Serial Set

United States - 1909
...with cones, intruded sheets, and dikes. Many of the lava sheets present abrupt walls from 50 to 150 feet in height. Some of the lava flows and volcanic...through which the molten mass may have found an outlet; elsewhere the lava seems to have eaten its way through the rocks without causing any disturbance, as...
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Contributions to Economic Geology, 1908: Mineral fuels, Part 2

Marius Robinson Campbell - Coal - 1910 - 559 pages
...lieils of coal and bituminous merous prospects throughout the Held. Coal from these beds .•mill! shale. has been mined at Rock Springs and Point of...found an outlet. In other localities the lava seems to Jiave forced its way through the rocks without causing any disturbance. The sedimentary beds lie pracs...
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