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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] |
Mono Pass
Mono Pass is a mountain pass, just outside Yosemite National Park, near the region of Tuolumne Meadows. Mono Pass is between Mount Gibbs and Mount Lewis. There is another pass also named Mono less than 40 miles away in the Rock Creek/Little Lakes Valley area. Both Mono Passes are in the Inyo National Forest. The Mono Pass in the Rock Creek/Little Lakes Valley area is accessed by the Mosquito Flats Trailhead rather than the Mono Pass Trailhead in Yosemite National Park. Native history When only Native Americans lived in the area, and for a time after, a major trading trail went over Mono Pass and through Bloody Canyon to Mono Lake, just to the east of the Yosemite area. The location of Mono Pass Mono Pass is just outside 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 Ser ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mount Dana
Mount Dana is a mountain in the U.S. state of California. Its summit marks the eastern boundary of Yosemite National Park and the western boundary of the Ansel Adams Wilderness. At an elevation of , it is the second highest mountain in Yosemite (after Mount Lyell (California), Mount Lyell), and the northernmost summit in the Sierra Nevada which is over in elevation. Mount Dana is the highest peak in Yosemite that is a simple hike to the summit. The mountain is named in honor of James Dwight Dana, who was a professor of natural history and geology at Yale University, Yale. Mount Dana is composed of batholith, prebatholithic rock that is mostly reddish metamorphic rock, which was composed by metavolcanics of surfacing magma from the Mesozoic Era. Mount Dana's northern face includes a small, receding glacier known as the Dana Glacier (California), Dana Glacier. The Dana Meadows (California), Dana Meadows lie at the foot of the mountain. From the top, lakes throughout Dana Meadows, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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] |
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 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Magma Chamber
A magma chamber is a large pool of liquid rock beneath the surface of the Earth. The molten rock, or magma, in such a chamber is less dense than the surrounding country rock, which produces buoyant forces on the magma that tend to drive it upwards. If the magma finds a path to the surface, then the result will be a volcanic eruption; consequently, many volcanoes are situated over magma chambers. These chambers are hard to detect deep within the Earth, and therefore most of those known are close to the surface, commonly between 1 km and 10 km down. Dynamics of magma chambers Magma rises through cracks from beneath and across the crust because it is less dense than the surrounding rock. When the magma cannot find a path upwards it pools into a magma chamber. These chambers are commonly built up over time, by successive horizontal or vertical magma injections. Influx of new magma causes reaction of pre-existing crystals and the pressure in the chamber to increase. Th ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Last Light On Mammoth Peak
A last is a mechanical form shaped like a human foot. It is used by shoemakers and cordwainers in the manufacture and repair of shoes. Lasts typically come in pairs and have been made from various materials, including hardwoods, cast iron, and high-density plastics. The term is derived from the Proto-Germanic *''laistaz'' ("track, trace, footprint"); cognates include Swedish ''läst'', Danish ''læste'', German ''Leisten''. Production Lasts come in many styles and sizes, depending on the exact job they are designed for. Common variations include simple one-size lasts used for repairing soles and heels, durable lasts used in modern mass production, and custom-made lasts used in the making of bespoke footwear. Though a last is made approximately in the shape of a human foot, the precise shape is tailored to the kind of footwear being made. For example, a boot last would be designed to hug the instep for a close fit. Modern last shapes are typically designed using dedicated ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mount Gibbs (Yosemite)
Mount Gibbs is located in the Sierra Nevada of the U.S. state of California, south of Mount Dana. The mountain was named in honor of Oliver Gibbs, a professor at Harvard University and friend of Josiah Whitney. The summit marks the boundary between Yosemite National Park and the Ansel Adams Wilderness, and Mount Gibbs is the sixth-highest mountain, of Yosemite. The peak is accessible either from the west, starting at Tioga Pass Road, or from the east, via Bloody Canyon from the trailhead at Walker Lake. Overnight camping is not permitted on the western side of the mountain, which is part of the protected watershed of Dana Meadows and Tioga Pass. In the summer the mountain has only patchy snow, on the northern slope. The easiest ascent is via the ridge extending west from the peak; there is a steep section of loose, unstable rock, leading to the gentle ridge that forms the top of the mountain. Although the top is above the tree line, there is some sparse plant life, includin ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mount Dana (Yosemite)
Mount Dana is a mountain in the U.S. state of California. Its summit marks the eastern boundary of Yosemite National Park and the western boundary of the Ansel Adams Wilderness. At an elevation of , it is the second highest mountain in Yosemite (after Mount Lyell), and the northernmost summit in the Sierra Nevada which is over in elevation. Mount Dana is the highest peak in Yosemite that is a simple hike to the summit. The mountain is named in honor of James Dwight Dana, who was a professor of natural history and geology at Yale. Mount Dana is composed of prebatholithic rock that is mostly reddish metamorphic rock, which was composed by metavolcanics of surfacing magma from the Mesozoic Era. Mount Dana's northern face includes a small, receding glacier known as the Dana Glacier. The Dana Meadows lie at the foot of the mountain. From the top, lakes throughout Dana Meadows, Mono Lake, Tioga Peak and many other mountains are in view. Hike From the Tioga Pass Road t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Granite Dome
Granite domes are domical hills composed of granite with bare rock exposed over most of the surface. Generally, domical features such as these are known as bornhardts. Bornhardts can form in any type of plutonic rock but are typically composed of granite and granitic gneiss. As granitic plutons cool kilometers below the Earth's surface, minerals in the rock crystallize under uniform confining pressure. Erosion brings the rock closer to Earth's surface and the pressure from above the rock decreases; as a result the rock fractures. These fractures are known as exfoliation joints, or sheet fractures, and form in onionlike patterns that are parallel to the land surface. These sheets of rock peel off the exposed surface and in certain conditions develop domical structures. Additional theories on the origin of granite domes involve scarp-retreat and tectonic uplift. Sheet fractures Sheet fractures are arcuate fractures defining slabs of rock that range from 0.5 to 10 meters thic ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Lembert Dome
Lembert Dome is a granite dome rock formation in Yosemite National Park in the US state of California. The dome soars above Tuolumne Meadows and the Tuolumne River and can be hiked starting at the Tioga Road in the heart of Tuolumne Meadows, west of the Tioga Pass Entrance to Yosemite National Park. The landform is an example of a rôche moutonnée with clear lee and stoss slopes. Lembert Dome was named for Jean Baptiste Lembert, sometimes mistakenly referred to as John Lambert, who took up a homestead in a section of Tuolumne Meadows in 1865. By 1879 the Wheeler Survey referred to it as Soda Springs Dome. John Muir called it Glacier Rock. Lembert Dome is near Puppy Dome, is also close to Dog Dome. Rock climbers can scale the face from the parking lot just off the Tioga Road, but hiker Hiking is a long, vigorous walk, usually on trails or footpaths in the countryside. Walking for pleasure developed in Europe during the eighteenth century.AMATO, JOSEPH A. "Mind over Fo ... [...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 Lawren ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ridge
A ridge or a mountain ridge is a geographical feature consisting of a chain of mountains or hills that form a continuous elevated crest for an extended distance. The sides of the ridge slope away from the narrow top on either side. The lines along the crest formed by the highest points, with the terrain dropping down on either side, are called the ridgelines. Ridges are usually termed hills or mountains as well, depending on size. Smaller ridges, especially those leaving a larger ridge, are often referred to as spurs. Types There are several main types of ridges: ;Dendritic ridge: In typical dissected plateau terrain, the stream drainage valleys will leave intervening ridges. These are by far the most common ridges. These ridges usually represent slightly more erosion resistant rock, but not always – they often remain because there were more joints where the valleys formed or other chance occurrences. This type of ridge is generally somewhat random in orientation, often ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
