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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. The Suite includes Half Dome Granodiorite, Cathedral Peak Granite, and Kuna Crest Granodiorite. The largest pluton of the Tuolumne Intrusive Suite is Cathedral Peak Granodiorite, which extends long distances both the north and south of 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 ''Tuolumn .... The southwestern part of the Tuolumne Intrusive Suite is made up of Half Dome Granodiorite. The youngest, smallest, and most central rock body is of the Johnson Granite Porphyry Age From oldest to youngest, the rock units are # Kuna Crest Granodiorite 91-88 Ma # Half Dome Granodiorite 85–83.4 Ma # Cathedral Pea ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Suite (geology)
In geology, a suite is a lithodemic unit consisting of two or more lithodemes of a single genetic class (metamorphic, igneous or sedimentary Sedimentary rocks are types of rock formed by the cementation of sediments—i.e. particles made of minerals (geological detritus) or organic matter (biological detritus)—that have been accumulated or deposited at Earth's surface. Sedime ...). The law of superposition is inapplicable to intrusive, highly deformed, or metamorphic bodies of rock lacking discernible stratification. Such bodies of rock are described as ''lithodemic'' and are determined and delimited based on rock characteristics. The 1983 North American Stratigraphic Code adopted the formal term ''lithodeme'', which is comparable to a formation. A lithodeme is the fundamental unit and should possess distinctive and consistent lithological features, comprising a single rock type or a mixture of two or more types that distinguishes the unit from those around it. A ''suite ... [...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. Califor ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Intrusive Suite Of Yosemite Valley
The Intrusive Suite of Yosemite Valley (see Yosemite Valley) 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 # Tuolumne Intrusive Suite # Johnson Granite Porphyry It is an intrusive suite composed mainly of granitic rocks, which near the metasedimentary pendant A pendant is a loose-hanging piece of jewellery, generally attached by a small loop to a necklace, which may be known as a "pendant necklace". A pendant earring is an earring with a piece hanging down. Its name stems from the Latin word ... have locally mingled with granitic to gabbroic compositions. References External links and references Geology and geochemistry of mafic to felsic plutonic rocks in the Cretaceous intrusive suite of Yosemite Valley, California Geology of California Geology ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Intrusive Suite Of Sonora Pass
The Intrusive Suite of Sonora Pass (also, the Sonora Pass 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 Yosemite Valley # Tuolumne Intrusive Suite The Intrusive Suite of Sonora Pass is ~92-89 Ma, and is the northernmost of four large Late Cretaceous zoned intrusive suites in the central Sierra Nevada batholith. Rock types On a large scale, it is composed of Kinney Lakes granodiorite and the younger Topaz Lake granodiorite. On a finer scale, the Intrusive Suite of Sonora Pass is made of light-gray, coarse-grained biotite granodiorite, plus granite with roughly equant, well-formed potassium feldspar phenocrysts composing about 2–10% of the rock. Quartz usually occurs in clots of . The mafic A mafic mineral or rock is a silicate mineral or igneous rock ric ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Intrusive Suite Of Merced Peak
The Intrusive Suite of Merced Peak 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 Sonora Pass # Intrusive Suite of Yosemite Valley # Johnson Granite Porphyry # Tuolumne Intrusive Suite Geology The Intrusive Suite of Merced Peak dates to roughly 98 Ma. The formation dates to mid-Cretaceous. It lies within the volcanogenic Minarets sequence, and comprises the 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 gra ... of Jackass Lakes and the leucogranites of Timber Knob and Norris Creek. Most of the suite is the former. See also * Merced Peak References External links One reference Geology of California ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Intrusive Suite Of Buena Vista Crest
The Intrusive Suite of Buena Vista Crest is an intrusive suite which extends southward, from Yosemite Valley to Yosemite National Park's southeastern boundary, into plutons of the Sierra Nevada Batholith, which are slightly older. These intrusive suites also include # Fine Gold Intrusive Suite # Intrusive Suite of Jack Main Canyon # Intrusive Suite of Merced Peak # Intrusive Suite of Sonora Pass # Intrusive Suite of Yosemite Valley # 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. The Suite includes Half Dome Granodiorite, Cathedral Peak Granite, and Kuna Cr ... The age of the Intrusive Suite of Buena Vista Crest The Intrusive Suite of Buena Vista Crest came to be roughly 100 to 90 Ma. It is roughly the same age as the Washburn Lake Intrusive Suite and the Merced Peak Intrusive Suite, both of which are to the east of the In ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Fine Gold Intrusive Suite
The Fine Gold Intrusive Suite is one of several intrusive suites that crosses into Yosemite National Park. These also include # 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 # Tuolumne Intrusive Suite The Fine Gold Intrusive Suite is an intrusive suite which is massive (more than 3100 square kilometers) and long-lived (ca. 19 million years). Where is intrudes The Fine Gold Intrusive Suite intrudes both accreted oceanic terranes, and/or island-arc terranes, and, also continental crust Continental crust is the layer of igneous, metamorphic, and sedimentary rocks that forms the geological continents and the areas of shallow seabed close to their shores, known as '' continental shelves''. This layer is sometimes called '' si .... References External links and references The Fine Gold Intrusive Suite: The roles of basement terranes and ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Johnson Granite Porphyry
Johnson Granite Porphyry is found in Tuolumne Meadows, Yosemite National Park. Johnson Granite Porphyry was named for Johnson Peak, the highest mountain in Tuolumne Meadows, Yosemite National Park. Its area is estimated at , the exposed area covering roughly .Glazner, Allen F, Stock, Greg M. (2010). ''Geology Underfoot in Yosemite''. Mountain Press, p. 53. . Johnson Granite Porphyry is part of the Tuolumne Batholith. Its boundaries are difficult to trace, and are irregular. It is both the youngest, and the most siliceous rock of Tuolumne Intrusive Suite. Geology The innermost, most felsic part of the Tuolumne Batholith is the Johnson Granite Porphyry. It is a highly irregular, elongated body. Completely surrounding it is the much larger body of Cathedral Peak granite. Field observations and magnetic fabrics suggest an extrusive event, that is, Johnson Granite Porphyry may record possible volcanism. This may relate to deformation along active shear zones. Johnson Granite ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Porphyry (geology)
Porphyry ( ) is any of various granites or igneous rocks with coarse-grained crystals such as feldspar or quartz dispersed in a fine-grained silicate-rich, generally aphanitic matrix or groundmass. In its non-geologic, traditional use, the term ''porphyry'' usually refers to the purple-red form of this stone, valued for its appearance, but other colours of decorative porphyry are also used such as "green", "black" and "grey". The term ''porphyry'' is from the Ancient Greek (), meaning " purple". Purple was the colour of royalty, and the Roman "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 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 miner ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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 granite to diorite, including granodiorite. The term ''granodiorite'' was first used by George F. Becker, G. F. Becker (1893) to describe granitic rocks in the Sierra Nevada, United States. Composition According to the QAPF diagram, granodiorite has a greater than 20% quartz by volume, and between 65% and 90% of the feldspar is plagioclase. A greater amount of plagioclase would designate the rock as tonalite. Granodiorite is felsic to intermediate composition, intermediate in composition. It is the Intrusive rock, intrusive igneous equivalent of the extrusive igneous dacite. It contains a large amount of sodium (Na) and calcium (Ca) rich plagioclase, potassium feldspar, quartz, and minor amounts of muscovite mica as the lighter colored miner ... [...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 rock, 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 (state), 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 (geology), country rock into which magma intrudes is an excellent thermal insulation, 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 part ... [...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: 7 March 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: 10 March 2017 and Kuna Peak is the highest point on Kuna Crest. Kuna Crest granodiorite was first i ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
