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Polly Dome
Polly Dome is a prominent granite dome rising above the northwest side of Tenaya Lake and Tioga Road in the Yosemite high country. The dome, more than 3 kilometers (~2 miles) long, is a substantially intact mass of granitic rock that has withstood heavy glaciation and exfoliation. Forest clings to the less-steep parts of its north and west slopes. The southwest end of Polly Dome consists of the Stately Pleasure Dome, lower than Polly Dome, but rising very steeply from the shore of the lake. Polly Dome's summit has unobstructed views east to the Cathedral Range, north over Tuolumne Meadows to the Sierra crest, northwest over the Grand Canyon of the Tuolumne and southwest to Half Dome Half Dome is a granite dome at the eastern end of Yosemite Valley in Yosemite National Park, California. It is a well-known rock formation in the park, named for its distinct shape. One side is a sheer face while the other three sides are smooth .... References Granite domes of Yosemite Na ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pywiack Dome
Pywiack Dome is a prominent 600 foot granite dome in Yosemite National Park, located north-east of Tenaya Lake, west of Tuolumne Meadows and from the Tioga Road. It is quite near Harlequin Dome, and North and South Whizz Domes are north. Josiah Whitney the head of California Geological Survey wrote in 1863 about Pywiack Dome in ''Geology'': Climbing The west face of the formation is popular with rock climbers and has several multi-pitch slab climbs easily visible from the Tioga Road. Earliest was ''Dike Route'' a 6 pitch YDS 5.9R first climbed in August 1966 by Tom Gerughty, Roger Evje and Dave Meeks. Other popular climbs include Zee Tree (a 5 pitch YDS 5.7) and Aqua Knobby (a 4 pitch YDS 5.9) Etymology "Py-we-ack" in the native language means "glistening rocks", and the native people applied it to both the Tenaya Creek and Tenaya Lake, due to the abundance of glacial polish in the upper Tenaya basin. In 1932 the name "Pywiack" has applied to Pywiack Cascade. Pyw ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Exfoliation Joint
Exfoliation joints or sheet joints are surface-parallel fracture systems in rock, and often leading to erosion of concentric slabs. ''(See Joint (geology)).'' General characteristics of exfoliation joints * Commonly follow topography. * Divide the rock into sub-planar slabs. * Joint spacing increases with depth from a few centimeters near the surface to a few meters * Maximum depth of observed occurrence is around 100 meters. * Deeper joints have a larger radius of curvature, which tends to round the corners of the landscape as material is eroded * Fracture mode is tensile * Occur in many different lithologies and climate zones, not unique to glaciated landscapes. * Host rock is generally sparsely jointed, fairly isotropic, and has high compressive strength. * Can have concave and convex upwards curvatures. * Often associated with secondary compressive forms such as arching, buckling, and A-tents (buckled slabs) Formation of exfoliation joints Despite their common occu ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Granite Domes Of Yosemite National Park
Granite () is a coarse-grained (phaneritic) intrusive igneous rock composed mostly of quartz, alkali feldspar, and plagioclase. It forms from magma with a high content of silica and alkali metal oxides that slowly cools and solidifies underground. It is common in the continental crust of Earth, where it is found in igneous intrusions. These range in size from dike (geology), dikes only a few centimeters across to batholiths exposed over hundreds of square kilometers. Granite is typical of a larger family of ''granitic rocks'', or ''granitoids'', that are composed mostly of coarse-grained quartz and feldspars in varying proportions. These rocks are classified by the relative percentages of quartz, alkali feldspar, and plagioclase (the QAPF diagram, QAPF classification), with true granite representing granitic rocks rich in quartz and alkali feldspar. Most granitic rocks also contain mica or amphibole minerals, though a few (known as leucogranites) contain almost no dark minerals. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Half Dome
Half Dome is a granite dome at the eastern end of Yosemite Valley in Yosemite National Park, California. It is a well-known rock formation in the park, named for its distinct shape. One side is a sheer face while the other three sides are smooth and round, making it appear like a dome cut in half. The granite crest rises more than above the valley floor. Geology The impression from the valley floor that this is a round dome that has lost its northwest half, is just an illusion. From Washburn Point, Half Dome can be seen as a thin ridge of rock, an arête, that is oriented northeast–southwest, with its southeast side almost as steep as its northwest side except for the very top. Although the trend of this ridge, as well as that of Tenaya Canyon, is probably controlled by master joints, 80 percent of the northwest "half" of the original dome may well still be there. Ascents As late as the 1870s, Half Dome was described as "perfectly inaccessible" by Josiah Whitney of the Ca ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Grand Canyon Of The Tuolumne
The Grand Canyon of the Tuolumne is the notable canyon section of the river valley of the Tuolumne River, located within Yosemite National Park, in Tuolumne County and the Sierra Nevada, California. As defined by the United States Geological Survey, the canyon begins at Glen Aulin and ends directly above Hetch Hetchy Valley. Geography The Grand Canyon of the Tuolumne starts at Glen Aulin, immediately below the confluence of Cold Canyon, Conness Creek, and the Tuolumne River. Here, the valley walls pull away from each other and become steeper. The water meanders and forms deep pools. After the waterfall that marks the end of Glen Aulin, the canyon becomes deeper again, and roughly "V"-shaped in cross-section. The walls are not as steep and bare as those of Yosemite Valley. The flora of the valley bottom is a haphazard melange of chaparral, manzanita scrub and oak woodland characteristic of the foothills and lowlands with a coniferous forest reminiscent of (but different from) ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sierra Crest
The Sierra Crest is a roughly generally north-to-south ridgeline that demarcates the broad west and narrow east slopes of the Sierra Nevada and that extends as far east as the Sierra's topographic front (e.g., Diamond Mountains and Sierran escarpment). The northern and central Sierra Crest sections coincide with over of the Great Basin Divide, and the southern crest demarcates Tulare and Inyo counties and extends through Kern County to meet the Tehachapi crest. The Sierra Crest also forms two paths (bifurcates) around endorheic cirques (e.g., Cup Lake) between the west and east Sierra slopes. Theodore Solomons made the first attempt to map a crest route along the Sierras. He was instrumental in envisioning, exploring, and establishing the route of what became the John Muir Trail from Yosemite Valley along the crest of the Sierra Nevada to Mount Whitney Mount Whitney (Paiute: Tumanguya; ''Too-man-i-goo-yah'') is the highest mountain in the contiguous United States and ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Tuolumne Meadows
Tuolumne Meadows () is a gentle, granitic dome, 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 National Park, 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 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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. Geography The range includes Cathedral Peak, Unicorn Peak, Eichorn Pinnacle, Echo Peaks, Echo Ridge, Matthes Crest, Rafferty Peak, Vogelsang Peak, Fletcher Peak and Cockscomb. The highest point in the range is Mount Florence, one of the most prominent peaks in the Yosemite high country. The highest peak in Tuolumne Meadows is Johnson Peak. The range runs beside the two Cathedral Lakes, just one mile southwest of Cathedral Peak. Hikers can access the lakes and Cathedral range by the John Muir trail from the trailhead in Tuolumne Meadows. Geology The mountains were formed by glaciers carving out the granite material; also see Cathedral Peak Granodiorite The Cathedral Peak Granodiorite (CPG) was named after its type locality, Cathedral Peak i ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Stately Pleasure Dome
Stately Pleasure Dome is the unofficial name for the prominent south-southwestern portion of Polly Dome, a granite dome on the northwest side of Tenaya Lake and Tioga Road in the Yosemite high country. Stately Pleasure Dome consists of glaciated and exfoliated granite rock that rises steeply from the lake shore; the very steep east side of the dome is popular with rock climbers, who gave the dome its name. The name presumably comes from the poem Kubla Khan by Samuel Taylor Coleridge Samuel Taylor Coleridge (; 21 October 177225 July 1834) was an English poet, literary critic, philosopher, and theologian who, with his friend William Wordsworth, was a founder of the Romantic Movement in England and a member of the Lake Poe ...: Climbing The south face of the formation is popular with rock climbers and has over twenty multi-pitch slab climbs many of them easy or moderate. References Granite domes of Yosemite National Park Landforms of Tuolumne County, Californi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Glaciated Rock
A glaciated rock is a rock that shows evidence of having been exposed to a glacier. Generally it has striations or deep scratches, caused more by the debris being carried by the glacier than by the ice itself. Glaciated rocks may also be erratics - that is, not belonging to the local rocks but having been transported there by the glacier. Where a present-day glacier is retreating, its former extent can be measured by distribution of the glaciated rocks. More significantly glaciated rocks in any area mean that it has been under ice at some stage. Thus they have produced evidence that Saudi Arabia Saudi Arabia, officially the Kingdom of Saudi Arabia (KSA), is a country in Western Asia. It covers the bulk of the Arabian Peninsula, and has a land area of about , making it the fifth-largest country in Asia, the second-largest in the A ... was once covered by an ice sheet. Petrology {{Glaciology-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
California
California is a U.S. state, state in the Western United States, located along the West Coast of the United States, Pacific Coast. With nearly 39.2million residents across a total area of approximately , it is the List of states and territories of the United States by population, most populous U.S. state and the List of U.S. states and territories by area, 3rd largest by area. It is also the most populated Administrative division, subnational entity in North America and the 34th most populous in the world. The Greater Los Angeles area and the San Francisco Bay Area are the nation's second and fifth most populous Statistical area (United States), urban regions respectively, with the former having more than 18.7million residents and the latter having over 9.6million. Sacramento, California, Sacramento is the state's capital, while Los Angeles is the List of largest California cities by population, most populous city in the state and the List of United States cities by population, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Tioga Road
Tioga may refer to: United States communities *Tioga, California, former name of Bennettville, California *Tioga, Colorado *Tioga, Florida * Tioga, Iowa *Tioga, Louisiana *Tioga, New York, a town in Tioga County *Tioga County, New York, a county at the Pennsylvania border *Tioga, North Dakota, a city in Williams County * Tioga, Pennsylvania, a borough in Tioga County *Tioga County, Pennsylvania *Tioga, a neighborhood of Nicetown–Tioga in Philadelphia, Pennsylvania *Tioga, Texas, a town in Grayson County *Tioga, West Virginia *Tioga, Wisconsin, an unincorporated community United States geography *Tioga Lake, a lake in Inyo National Forest in the Sierra Nevada mountains of California *Tioga Pass, a mountain pass in the Sierra Nevada *Tioga River (Michigan) *Tioga River (New Hampshire) *Tioga River (Chemung River) The Tioga River ( ) is a tributary of the Chemung River, approximately long,U.S. Geological Survey. National Hydrography Dataset high-resolution flowline dataThe National ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
