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Tuolumne Batholith
The Tuolumne Intrusive Suite is one of several intrusive suites in Yosemite National Park. These also include # Fine Gold Intrusive Suite # Intrusive Suite of Buena Vista Crest # Intrusive Suite of Jack Main Canyon # Intrusive Suite of Merced Peak # Intrusive Suite of Sonora Pass # Intrusive Suite of Yosemite Valley The age and composition of the Tuolumne Intrusive Suite The Tuolumne Intrusive Suite is the youngest and most extensive of the intrusive suites of Yosemite National Park, and also comprises about 1/3 of the park's area, is the most extensive intrusive suite in the Park. It contains rock types including Half Dome Granodiorite and Cathedral Peak Granite, also, Kuna Crest Granodiorite. Oldest to youngest rocks are # Kuna Crest Granodiorite, # Half Dome Granodiorite, # Cathedral Peak Granodiorite (which is about 86 million years old), to # Johnson Granite Porphyry. The youngest, smallest, and most central rock body is of the Johnson Granite Porphyry, a varie ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Intrusive Suite
An intrusive suite is a group of plutons related in time and space.Glazner, Allen F, Stock, Greg M. (2010). ''Geology Underfoot in Yosemite''. Mountain Press, p. 45. . All rocks in an intrusive suite result from the same magma-producing event.The Geologic Story of Yosemite National Park (1987), “Rocks, the building materials,” by N. King HuberIntrusive Suite accessdate: April 4, 2017 See also * Extrusive rock Extrusive rock refers to the mode of igneous volcanic rock formation in which hot magma from inside the Earth flows out (extrudes) onto the surface as lava or explodes violently into the atmosphere to fall back as pyroclastics or tuff. In contras ... References Igneous petrology {{geology-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Kuna Crest Granodiorite
Kuna Crest Granodiorite (also called ''Granodiorite of Glen Aulin''), is found, in Yosemite National Park, United States. The granodiorite forms part of the Tuolumne Intrusive Suite (aka Tuolumne Batholith), one of the four major intrusive suites within the Sierra Nevada. Of the Tuolumne Intrusive Suite, it is the oldest and darkest rock.The Geologic Story of Yosemite National Park (1987), "Rocks, the building materials," by N. King Huberthe oldest and darkest rock in the Tuolumne Intrusive Suite accessdate: March 7, 2017 Kuna Crest granodiorite forms most of the outer part of the Tuolumne Intrusive Suite, on the edges. Name The word ''Kuna'' probably derives from a Shoshonean word, with a meaning "fire," appearing in the Mono dialect of the area, with meaning of ''firewood''. The rocks on Kuna Peak can be a red colorAttractions in Kuna PeakAttractions in Kuna Peak accessdate: March 10, 2017 and Kuna Peak is the highest point on Kuna Crest. Kuna Crest granodiorite was first ide ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Kuna Peak (Yosemite)
Kuna Peak is a summit on the boundary between Mono and Tuolumne counties, in the United States, is the highest point on Kuna Crest. With an elevation of , Kuna Peak is the 146th-highest summit in the state of California, and is the third-highest mountain in Yosemite National Park. Name The word ''Kuna'' probably derives from a Shoshonean or word meaning "fire," appearing in the Mono dialect of the area, with a meaning of ''firewood''. On the summit, there are many jagged pieces of rock which resemble fire themselves; see Kuna Crest Granodiorite. Geography Kuna Peak is flanked by shorter peaks all of which are nearly equal in height, such as Koip Peak, which is a mile to the east, and is feet lower. The western side of Kuna Peak is in Yosemite National Park, the eastern side being in the Ansel Adams Wilderness. The following features are near Kuna Peak: * Bingaman Lake * Donohue Peak * Koip Peak * Helen Lake * Kuna Lake * Mammoth Peak * Mono Pass * Mount Andrea Lawr ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Kuna Crest (Yosemite)
Kuna Crest is a mountain range near Tuolumne Meadows, in Yosemite National Park, California. Name The word ''Kuna'' probably derives from a Shoshonean word meaning "fire," which appears in the Mono dialect of the area, with a meaning of ''firewood''. On the summit of near-by Kuna Peak, there are many jagged pieces of rock which resemble fire themselves; see Kuna Crest Granodiorite. Geography and geology The Crest lies between two U-shaped glacial valleys: Lyell Canyon and the canyon of the Parker Pass Creek. Mammoth Peak lies at the northern end of the Kuna Crest. A number of lakes lie in cirques cut into the eastern edge of the Crest, including Kuna Lake, Bingaman Lake, Spillway Lake, and Helen Lake. The Crest consists of Kuna Crest Granodiorite, which is the oldest granitic rock of the Tuolumne Intrusive Suite. It is rich in biotite and hornblende. Rock climbing Climbing on Kuna Crest consists of mostly of walking and scrambling; there isn't much rock climbing, on Kuna C ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Tuolumne Meadows
Tuolumne Meadows () is a gentle, dome-studded, sub-alpine meadow area along the Tuolumne River in the eastern section of Yosemite National Park in the United States. Its approximate location is . Its approximate elevation is . The term ''Tuolumne Meadows'' is also often used to describe a large portion of the Yosemite high country around the meadows, especially in context of rock climbing. Natural history The meadow vegetation is supported by shallow groundwater. The water comes from 1,000 mm (39 inches) of precipitation annually, predominantly in the form of snow. Water arises from snowmelt and hill-slope aquifers, and flows through the Tuolumne River, Budd Creek, Delaney Creek, and Unicorn Creek. In spring, as soon as the snow melts, it is not uncommon to see large areas of the meadows flooded and practically transformed into lakes. While the mountains of the Sierra near the meadows have had some permanent snowfields, in the summer they are mostly free of snow. Although brie ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pluton (geology)
In geology, an igneous intrusion (or intrusive body or simply intrusion) is a body of intrusive igneous rock that forms by crystallization of magma slowly cooling below the surface of the Earth. Intrusions have a wide variety of forms and compositions, illustrated by examples like the Palisades Sill of New York and New Jersey; the Henry Mountains of Utah; the Bushveld Igneous Complex of South Africa; Shiprock in New Mexico; the Ardnamurchan intrusion in Scotland; and the Sierra Nevada Batholith of California. Because the solid country rock into which magma intrudes is an excellent insulator, cooling of the magma is extremely slow, and intrusive igneous rock is coarse-grained (phaneritic). Intrusive igneous rocks are classified separately from extrusive igneous rocks, generally on the basis of their mineral content. The relative amounts of quartz, alkali feldspar, plagioclase, and feldspathoid is particularly important in classifying intrusive igneous rocks. Intrusions must ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Porphyry (geology)
Porphyry ( ) is a textural term for an igneous rock consisting of coarse-grained crystals such as feldspar or quartz dispersed in a fine-grained silicate-rich, generally aphanitic matrix or groundmass. The larger crystals are called phenocrysts. In its non-geologic, traditional use, the term ''porphyry'' refers to the purple-red form of this stone, valued for its appearance. The term ''porphyry'' is from the Ancient Greek (), meaning "purple". Purple was the color of royalty, and the "imperial porphyry" was a deep purple igneous rock with large crystals of plagioclase. Some authors claimed the rock was the hardest known in antiquity. Thus, "imperial"-grade porphyry was prized for monuments and building projects in Imperial Rome and thereafter. Subsequently, the name was given to any igneous rocks with large crystals. The adjective ''porphyritic'' now refers to a certain texture of igneous rock regardless of its chemical and mineralogical composition. Its chief charact ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Johnson Granite Porphyry
Johnson is a surname of Anglo-Norman origin meaning "Son of John". It is the second most common in the United States and 154th most common in the world. As a common family name in Scotland, Johnson is occasionally a variation of ''Johnston'', a habitational name. Etymology The name itself is a patronym of the given name ''John'', literally meaning "son of John". The name ''John'' derives from Latin ''Johannes'', which is derived through Greek ''Iōannēs'' from Hebrew ''Yohanan'', meaning "Yahweh has favoured". Origin The name has been extremely popular in Europe since the Christian era as a result of it being given to St John the Baptist, St John the Evangelist and nearly one thousand other Christian saints. Other Germanic languages * Swedish: Johnsson, Jonsson * Icelandic: Jónsson See also * List of people with surname Johnson *Gjoni (Gjonaj) *Ioannou * Jensen *Johansson *Johns *Johnsson * Johnston *Johnstone *Jones *Jonson *Jonsson Jonsson is a surname of Nordi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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 suites within the Sierra Nevada. It has been assigned radiometric ages between 88 and 87 million years and therefore reached its cooling stage in the Coniacian (Upper Cretaceous). Geographic situation The Cathedral Peak Granodiorite forms part of the central eastern Sierra Nevada in California. It is exposed in glaciated outcrops from the upper Yosemite Valley into the high Sierra Divide. It covers large parts of Mariposa County and Tuolumne County and also touches Madera County and Mono County. At its northern end it includes Tower Peak and Matterhorn Peak, at 12,264 feet (3743 m) its highest elevation. In its southwestern section rises the Cathedral Range with the 10,911 feet Cathedral Peak (3326 m) above Tuolumne Meadows. California ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cathedral Peak Granite
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 suites within the Sierra Nevada. It has been assigned radiometric ages between 88 and 87 million years and therefore reached its cooling stage in the Coniacian (Upper Cretaceous). Geographic situation The Cathedral Peak Granodiorite forms part of the central eastern Sierra Nevada in California. It is exposed in glaciated outcrops from the upper Yosemite Valley into the high Sierra Divide. It covers large parts of Mariposa County and Tuolumne County and also touches Madera County and Mono County. At its northern end it includes Tower Peak and Matterhorn Peak, at 12,264 feet (3743 m) its highest elevation. In its southwestern section rises the Cathedral Range with the 10,911 feet Cathedral Peak (3326 m) above Tuolumne Meadows. California St ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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 area of and sits in four countiescentered in Tuolumne and Mariposa, extending north and east to Mono and south to Madera County. Designated a World Heritage Site in 1984, Yosemite is internationally recognized for its granite cliffs, waterfalls, clear streams, giant sequoia groves, lakes, mountains, meadows, glaciers, and biological diversity. Almost 95 percent of the park is designated wilderness. Yosemite is one of the largest and least fragmented habitat blocks in the Sierra Nevada, and the park supports a diversity of plants and animals. The geology of the Yosemite area is characterized by granite rocks and remnants of older rock. About 10 million years ago, the Sierra Nevada was uplifted and tilted to form its unique s ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Half Dome Granodiorite
Half Dome Granodiorite is granodiorite (see also granite) found in a region on and near Half Dome, in Yosemite National Park, California, United States. The granodiorite forms part of the Tuolumne Intrusive Suite (aka Tuolumne Batholith), one of the four major intrusive suites within the Sierra Nevada. Mineralogy The granodiorite has large crystals of biotite, hornblende, and both feldspars — orthoclase and plagioclase. The space between crystals tends to be filled with quartz. The hornblende tends to have large, over rectangular crystals. The biotite forms hexagonal "blocks," up to across. A knife blade can peel the edges. Sphene is found in Half Dome Granodiorite. The grains are honey-colored, and large at across. Uranium is also present. From petrographic observation, the average mineral proportion of non-layered rocks of Half Dome Granodiorite is 45% plagioclase feldspar, 25% quartz, 8% biotite, 15% K-feldspar, 5% hornblende, 1% titanite, and 1% magnetite. Age H ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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