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The Walker Lane takes up 15 to 25 percent of the boundary motion between the Pacific plate and the North American plate, the other 75 percent being taken up by the San Andreas Fault system to the west. [4] [5] The Walker Lane may represent an incipient major transform fault zone which could replace the San Andreas as the plate boundary in the ...
Geologic map depicting the Smartville Complex (in brown) and other accreted terranes in California. [1]The Smartville Block, also called the Smartville Ophiolite, Smartville Complex, or Smartville Intrusive Complex, is a geologic terrane formed in the ocean from a volcanic island arc that was accreted onto the North American Plate during the late Jurassic (~160–150 million years ago).
The Mendocino Fracture Zone between the Gorda plate and Pacific plate (only the active section is traced) The Mendocino fracture zone is a fracture zone and transform boundary over 4000 km (2500 miles) long, [1] starting off the coast of Cape Mendocino in far northern California.
One terrane that may have driven the orogeny is the Nolan Belt, an intensely folded mass of quartzite, schist and slate extending from Esmeralda County to the north, through central Nevada as far as the Mountain City and Bull Run Mountain area near Idaho. Hinterland and foreland basins filled with sediments as the Antler highland eroded.
The oldest rocks in California date back 1.8 billion years to the Proterozoic and are found in the San Gabriel Mountains, San Bernardino Mountains, and Mojave Desert.The rocks of eastern California formed a shallow continental shelf, with massive deposition of limestone during the Paleozoic, and sediments from this time are common in the Sierra Nevada, Klamath Mountains and eastern Transverse ...
The Sierra Nevada–Great Valley Block (SNGV) is a section of the Earth's crust in California, United States, encompassing most of the region east of the Great Valley fault system which runs along the eastern foot of the Coast Ranges, and west of the Sierra Nevada Fault which runs along the foot of the Sierra Nevada's eastern scarp.
Nevada is commonly called the "Silver State" because of the silver produced from the Comstock Lode. However, since 1878, Nevada has been a relatively minor silver producer, with most subsequent bonanzas consisting of more gold than silver. In 1900, Jim Butler discovered Nevada's second largest silver strike in Tonopah, Nevada. Nevada is ...
Carlin Trend, shown with other alignments of sediment-hosted gold deposits in Nevada.Source: USGS. Newmont's Gold Quarry mine in 2009, on the Carlin Trend. The Carlin Unconformity or Carlin Trend is a geologic feature in northeastern Nevada which represents a period of erosion or non-deposition likely associated with a collision between a tectonic crustal block called a terrane and the North ...