Cathedral Peak is part of the

Cathedral Range The Cathedral Range is a mountain range immediately to the south of Tuolumne Meadows in Yosemite National Park. The range is an offshoot of the Sierra Nevada. The range is named after Cathedral Peak, which resembles a cathedral spire. Geograph ...

, a mountain range in the south-central portion of

Yosemite National Park Yosemite National Park ( ) is an American national park in California, surrounded on the southeast by Sierra National Forest and on the northwest by Stanislaus National Forest. The park is managed by the National Park Service and covers an ...

in eastern Mariposa and Tuolumne Counties. The range is an offshoot of the Sierra Nevada. The peak which lends its name to the range derives its name from its

cathedral A cathedral is a church that contains the '' cathedra'' () of a bishop, thus serving as the central church of a diocese, conference, or episcopate. Churches with the function of "cathedral" are usually specific to those Christian denominatio ...

-shaped peak, which was formed by

glacial A glacial period (alternatively glacial or glaciation) is an interval of time (thousands of years) within an ice age that is marked by colder temperatures and glacier advances. Interglacials, on the other hand, are periods of warmer climate betwe ...

activity: the peak remained uneroded above the glaciers in the

Pleistocene The Pleistocene ( , often referred to as the ''Ice age'') is the geological epoch that lasted from about 2,580,000 to 11,700 years ago, spanning the Earth's most recent period of repeated glaciations. Before a change was finally confirmed in ...

Geography

Cathedral Peak has a subsidiary summit to the west called Eichorn Pinnacle, for

Jules Eichorn Jules Marquard Eichorn (February 7, 1912 – February 15, 2000) was an American mountaineer, environmentalist, and music teacher. Early years Jules Marquard Eichorn was born in San Francisco on February 7, 1912, to Hilmar and Frieda Eichorn, wh ...

, who first ascended a class 5.4 route to its summit on July 24, 1931, with Glen Dawson. In 1869,

John Muir John Muir ( ; April 21, 1838December 24, 1914), also known as "John of the Mountains" and "Father of the National Parks", was an influential Scottish-American naturalist, author, environmental philosopher, botanist, zoologist, glaciologist ...

wrote in ''My first summer in the Sierra'': CathedralPeakCA

Geology

The

Cathedral Peak Granodiorite The Cathedral Peak Granodiorite (CPG) was named after its type locality, Cathedral Peak in Yosemite National Park, California. The granodiorite forms part of the Tuolumne Intrusive Suite (Tuolumne Batholith), one of the four major intrusive suit ...

of Cathedral Peak is an intrusion into an area of older intrusive (or plutonic) and metamorphic rock in the Sierra Nevada Batholith. It is part of a grouping of intrusions called the Tuolumne Intrusive Suite. Cathedral Peak is the youngest of the rock formations in the Suite, dating to the

Cretaceous The Cretaceous ( ) is a geological period that lasted from about 145 to 66 million years ago (Mya). It is the third and final period of the Mesozoic Era, as well as the longest. At around 79 million years, it is the longest geological period of ...

Period at 83 million years ago. Its composition is mainly

granodiorite Granodiorite () is a coarse-grained ( phaneritic) intrusive igneous rock similar to granite, but containing more plagioclase feldspar than orthoclase feldspar. The term banatite is sometimes used informally for various rocks ranging from gr ...

with

phenocryst 300px, feldspathic phenocrysts. This granite, from the Switzerland">Swiss side of the Mont Blanc massif, has large white plagioclase phenocrysts, triclinic minerals that give trapezoid shapes when cut through). 1 euro coins, 1 euro coin (diameter ...

s of

microcline Microcline (KAlSi3O8) is an important igneous rock-forming tectosilicate mineral. It is a potassium-rich alkali feldspar. Microcline typically contains minor amounts of sodium. It is common in granite and pegmatites. Microcline forms during slo ...

. Cathedral Peak was a nunatak during the Tioga glaciation of the last ice age, the peak projected above the glaciers, which carved and sharpened the peak's base while plucking away at its sides.

References

External links

* {{Authority control Geology of Yosemite National Park Mountains of Yosemite National Park Mountains of Mariposa County, California Mountains of Tuolumne County, California Igneous intrusions Mountains of Northern California Cretaceous magmatism Igneous petrology of California

Geography

Geology

See also

References

External links