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- Geology_of_the_Yosemite_area abstract "The exposed geology of the Yosemite area includes primarily granitic rocks with some older metamorphic rock. The first rocks were laid down in Precambrian times, when the area around Yosemite National Park was on the edge of a very young North American continent. The sediment that formed the area first settled in the waters of a shallow sea, and compressive forces from a subduction zone in the mid-Paleozoic fused the seabed rocks and sediments, appending them to the continent. Heat generated from the subduction created island arcs of volcanoes (not unlike Japan) that were also thrust into the area of the park. In time, the igneous and sedimentary rocks of the area were later heavily metamorphosed.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. This exposed the granitic rock to much lower pressure, and it was also subjected to erosion in the forms of exfoliation and mass wasting. Starting about 3 million years ago a series of glaciations further modified the area by accelerating the erosion. During that time large glaciers periodically filled the valleys and canyons. Landslides and river erosion have been the primary erosive forces since the end of the last glacial period, which ended in this area around 10,000 BCE.".
- Geology_of_the_Yosemite_area thumbnail Map_of_Yosemite_National_Park.svg?width=300.
- Geology_of_the_Yosemite_area wikiPageExternalLink index.html.
- Geology_of_the_Yosemite_area wikiPageExternalLink 8119.ch04.html.
- Geology_of_the_Yosemite_area wikiPageExternalLink geologic_story_of_yosemite.
- Geology_of_the_Yosemite_area wikiPageExternalLink contents.html.
- Geology_of_the_Yosemite_area wikiPageID "334330".
- Geology_of_the_Yosemite_area wikiPageRevisionID "592981997".
- Geology_of_the_Yosemite_area hasPhotoCollection Geology_of_the_Yosemite_area.
- Geology_of_the_Yosemite_area subject Category:Articles_containing_video_clips.
- Geology_of_the_Yosemite_area subject Category:Geology_of_California.
- Geology_of_the_Yosemite_area subject Category:Regional_geology_of_the_United_States.
- Geology_of_the_Yosemite_area subject Category:Yosemite_National_Park.
- Geology_of_the_Yosemite_area comment "The exposed geology of the Yosemite area includes primarily granitic rocks with some older metamorphic rock. The first rocks were laid down in Precambrian times, when the area around Yosemite National Park was on the edge of a very young North American continent. The sediment that formed the area first settled in the waters of a shallow sea, and compressive forces from a subduction zone in the mid-Paleozoic fused the seabed rocks and sediments, appending them to the continent.".
- Geology_of_the_Yosemite_area label "Geology of the Yosemite area".
- Geology_of_the_Yosemite_area sameAs Q5535432.
- Geology_of_the_Yosemite_area sameAs Q5535432.
- Geology_of_the_Yosemite_area wasDerivedFrom Geology_of_the_Yosemite_area?oldid=592981997.
- Geology_of_the_Yosemite_area depiction Map_of_Yosemite_National_Park.svg.
- Geology_of_the_Yosemite_area isPrimaryTopicOf Geology_of_the_Yosemite_area.
