Search results
Results From The WOW.Com Content Network
The plutons associated with the Sierra Nevada Batholith intruded into pre-existing rocks on the North American Continent. As the plutons intruded into these rocks, many were altered or metamorphosed. The "host rocks" include passive margin sequence units, deep water sediments, and shallow-water passive margin units.
Half Dome, a quartz monzonite monolith in Yosemite National Park and part of the Sierra Nevada Batholith. A batholith (from Ancient Greek bathos 'depth' and lithos 'rock') is a large mass of intrusive igneous rock (also called plutonic rock), larger than 100 km 2 (40 sq mi) in area, [1] that forms from cooled magma deep in the Earth's crust.
The Sierra Nevada lies primarily in Central and Eastern California, with the Carson Range, a small but historically important spur, extending into Nevada. West-to-east, the Sierra Nevada's elevation increases gradually from 500 feet (150 m) in the Central Valley [ 18 ] to more than 14,000 feet (4,300 m) atop the highest peaks of its crest 50 to ...
In early Triassic time, an extensive volcanic arc system called the Sierran Arc began to develop along the western margin of the North American continent. In Southern California, this volcanic arc would develop throughout the Mesozoic Era to become the geologic regions known as the Sierra Nevada Batholith, the Peninsular Ranges Batholith, (in the Peninsular Ranges), and other plutonic and ...
Compressive forces caused thrust faults to develop and granitic blobs of magma called plutons to rise in the Death Valley region and beyond, most notably producing the Sierra Nevada Batholith to the west. Thrust faulting was so severe that the continental shelf was shortened and some parts of older formations were moved on top of younger rock ...
At the end of their deposition, the only pre-Cenozoic, basement rocks exposed in this region were ridges of resistant greenstone (a type of mafic metavolcanic rock) and a few high summits of the Sierra Nevada's middle slopes. Further north and closer to their source areas, the Mehrten and Valley Springs formations consist of volcanic and ...
The Seven Teacups trail in the Sierra Nevada, ... Large rock or log caused Sierra Nevada whirlpool where three friends drowned. 'It was a freak accident' Summer Lin. August 28, 2024 at 6:00 AM ...
Most of the rock now exposed in the park is granitic, having been formed 210 to 80 million years ago as igneous diapirs 6 miles (10 km) below the surface. Over time, most of the overlying rock was uplifted along with the rest of the Sierra Nevada and was removed from the area by erosion.