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Kuna Crest
Kuna Crest is a mountain range near Tuolumne Meadows, in Yosemite National Park, California. Name The word ''Kuna'' probably derives from a Shoshonean language, Shoshonean word meaning "fire," which appears in the Mono language (California), Mono dialect of the area, with a meaning of ''firewood''. On the summit of near-by Kuna Peak (Yosemite), 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 (Yosemite National Park), 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 Cli ... [...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 County, countiescentered in Tuolumne County, California, Tuolumne and Mariposa County, California, Mariposa, extending north and east to Mono County, California, Mono and south to Madera County, California, Madera County. Designated a World Heritage Site in 1984, Yosemite is internationally recognized for its granite cliffs, waterfalls, clear streams, Sequoiadendron giganteum, giant sequoia groves, lakes, mountains, meadows, glaciers, and Biodiversity, biological diversity. Almost 95 percent of the park is designated National Wilderness Preservation System, 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 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Lyell Canyon
Lyell Canyon is a sub-alpine meadow in Yosemite National Park south of Tuolumne Meadows. For 13 kilometers (8 statute miles) most of the canyon has an approximate elevation of 2 700 meters (8,850 feet), and then rapidly climbs to 3 370 meters (11,056 feet) to Donohue Pass, below Donohue Peak – which marks the eastern boundary of Yosemite. The valley at the base is relatively flat and wide, following the Lyell Fork of the Tuolumne River through an open meadow and wooded areas. The Lyell Fork eventually meets with Tuolumne River. The canyon as well as Mount Lyell to the west is named after Charles Lyell, a well-known 19th century geologist and friend of Charles Darwin. The canyon is an easy hike from Tuolumne Meadows campground. The John Muir Trail and the Pacific Crest Trail both route through the canyon. The trail is popular for hikers as an easy way to view surrounding mountains, a waterfall and Sierra wildflowers. External links Yosemite Hikes See also * Lyell Meadow ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cretaceous Magmatism
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 the entire Phanerozoic. The name is derived from the Latin ''creta'', "chalk", which is abundant in the latter half of the period. It is usually abbreviated K, for its German translation ''Kreide''. The Cretaceous was a period with a relatively warm climate, resulting in high eustatic sea levels that created numerous shallow inland seas. These oceans and seas were populated with now- extinct marine reptiles, ammonites, and rudists, while dinosaurs continued to dominate on land. The world was ice free, and forests extended to the poles. During this time, new groups of mammals and birds appeared. During the Early Cretaceous, flowering plants appeared and began to rapidly diversify, becoming the dominant group of plants across the Earth b ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mammoth Peak (Tuolumne)
Mammoth Peak is a mountain in the area of Tuolumne Meadows, Yosemite National Park, California. The summit is a class 1-2 cross-country hike that features river crossings and boulder scrambling. The peak lies at the northern end of the Kuna Crest and is close to California State Route 120. From the road, its summit appears rounded and quite rocky. Though Mammoth Peak is not as popular as other nearby peaks, its relatively easily accessed summit affords tremendous views of Mount Gibbs, Mount Dana, and Mount Lewis. The proximity of Mammoth Peak All of the following are at least close to Mammoth Peak: * Cockscomb, a mountain * Johnson Peak, a mountain * Kuna Crest, a ridge, consisting of Kuna Crest South and Kuna Crest North * Kuna Peak, a mountain * Lembert Dome, a granite dome * Mount Dana, a mountain * Mount Gibbs, a mountain * Mount Lewis, a mountain Geology of the Mammoth Peak area Mammoth Peak is of a sheeted intrusive complex, formed in the interior of a to deep ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Traverse (climbing)
A traverse is a lateral move or route when climbing or descending (including skiing); going mainly sideways rather than up or down. The general sense of 'a Traverse' is to cross, or cut across and in general mountaineering, a road or path traveled traverses the steep gradient of the face. In civil engineering, road bed cuttings (or 'traverses') dug by construction operations creating an navigable incline into a hillside traverse the slope, also cut across the gradient as does the skier, climber, or builder. Climbing In climbing, Traversing a climbing wall is a good warm-up 'Warming up' is a part of stretching and preparation for physical exertion or a performance by exercising or practicing gently beforehand, usually undertaken before a performance or practice. Athletes, singers, actors and others warm up before s ... exercise. When moving laterally, the technique of ''crossing through'' is more efficient than shuffling. In this, the limbs are crossed so that the moves are ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Scrambling
Scrambling is a mountaineering term for ascending steep terrain using one's hands to assist in holds and balance.''New Oxford American Dictionary''. It is also used to describe terrain that falls between hiking and rock climbing (as a “scramble”). Sure-footedness and a head for heights are essential. Canyoning and stream climbing are other types of scrambling. Overview Scrambling is ascending or traversing a grade without technical apparatus. Unroped ascent in exposed situations is potentially one of the most dangerous of mountaineering activities. As soon as an ascent involves a rope, going up or down, it is no longer a scramble. Alpine scrambling Alpine scrambling is scrambling in high mountains and may not follow a defined or waymarked path. The Seattle Mountaineers climbing organization defines alpine scrambling as follows: Alpine Scrambles are off-trail trips, often on snow or rock, with a 'non-technical' summit as a destination. A non-technical summit is one ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hornblende
Hornblende is a complex inosilicate series of minerals. It is not a recognized mineral in its own right, but the name is used as a general or field term, to refer to a dark amphibole. Hornblende minerals are common in igneous and metamorphic rocks. The general formula is . Physical properties Hornblende has a hardness of 5–6, a specific gravity of 3.0 to 3.6, and is typically an opaque green, dark green, brown, or black color. It tends to form slender prismatic to bladed crystals, diamond-shaped in cross-section, or is present as irregular grains or fibrous masses. Its planes of cleavage intersect at 56° and 124° angles. Hornblende is most often confused with the pyroxene series and biotite mica, which are also dark minerals found in granite and charnockite. Pyroxenes differ in their cleavage planes, which intersect at 87° and 93°. Hornblende is an inosilicate (chain silicate) mineral, built around double chains of silica tetrahedra. These chains extend the length of t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Biotite
Biotite is a common group of phyllosilicate minerals within the mica group, with the approximate chemical formula . It is primarily a solid-solution series between the iron-endmember annite, and the magnesium-endmember phlogopite; more aluminous end-members include siderophyllite and eastonite. Biotite was regarded as a mineral ''species'' by the International Mineralogical Association until 1998, when its status was changed to a mineral ''group''. The term ''biotite'' is still used to describe unanalysed dark micas in the field. Biotite was named by J.F.L. Hausmann in 1847 in honor of the French physicist Jean-Baptiste Biot, who performed early research into the many optical properties of mica. Members of the biotite group are sheet silicates. Iron, magnesium, aluminium, silicon, oxygen, and hydrogen form sheets that are weakly bound together by potassium ions. The term "iron mica" is sometimes used for iron-rich biotite, but the term also refers to a flaky micaceous form ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Tuolumne Intrusive Suite
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 variet ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Granitic Rock
A granitoid is a generic term for a diverse category of coarse-grained igneous rocks that consist predominantly of quartz, plagioclase, and alkali feldspar. Granitoids range from plagioclase-rich tonalites to alkali-rich syenites and from quartz-poor monzonites to quartz-rich quartzolites. As only two of the three defining mineral groups (quartz, plagioclase, and alkali feldspar) need to be present for the rock to be called a granitoid, foid-bearing rocks, which predominantly contain feldspars but no quartz, are also granitoids. The terms ''granite'' and ''granitic rock'' are often used interchangeably for granitoids; however, granite is just one particular type of granitoid. Granitoids are diverse; no classification system for granitoids can give a complete and unique characterization of the origin, compositional evolution, and geodynamic environment for the genesis of a granitoid. Accordingly, multiple granitoid classification systems have been developed such as those based on ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Bingaman Lake
Bingaman Lake is a lake in Tuolumne County, California, in the United States. Bingaman Lake was named for John W. Bingaman, a park ranger who stocked the lake with fish in exchange for the naming rights. The lake is below Kuna Crest and Kuna Peak. See also *List of lakes in California There are more than 3,000 named lakes, reservoirs, and dry lakes in the U.S. state of California. Largest lakes In terms of area covered, the largest lake in California is the Salton Sea, a lake formed in 1905 which is now saline. It occupies ... References Lakes of Tuolumne County, California Lakes of Yosemite National Park {{TuolumneCountyCA-geo-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mammoth Peak (Yosemite National Park)
Mammoth Peak is a mountain in the area of Tuolumne Meadows, Yosemite National Park, California. The summit is a class 1-2 cross-country hike that features river crossings and boulder scrambling. The peak lies at the northern end of the Kuna Crest and is close to California State Route 120. From the road, its summit appears rounded and quite rocky. Though Mammoth Peak is not as popular as other nearby peaks, its relatively easily accessed summit affords tremendous views of Mount Gibbs, Mount Dana, and Mount Lewis. The proximity of Mammoth Peak All of the following are at least close to Mammoth Peak: * Cockscomb, a mountain * Johnson Peak, a mountain * Kuna Crest, a ridge, consisting of Kuna Crest South and Kuna Crest North * Kuna Peak, a mountain * Lembert Dome, a granite dome * Mount Dana, a mountain * Mount Gibbs, a mountain * Mount Lewis, a mountain Geology of the Mammoth Peak area Mammoth Peak is of a sheeted intrusive complex, formed in the interior of a to deep ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
