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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] |
Gaylor Peak
Gaylor Peak is an 11,004-foot-elevation (3,354 meter) mountain summit located on the crest of the Sierra Nevada mountain range in northern California, United States. The peak is situated on the common boundary shared by Yosemite National Park with Inyo National Forest, as well as the border shared by Mono County with Tuolumne County. It rises immediately above the park's Tioga Pass entrance station and Tioga Lake. Topographic relief is significant as the summit rises approximately 1,400 feet (427 meters) above the lake in one-half mile (1 km). The peak is a popular hiking destination on summer weekends due to easy access via the two-mile Gaylor Lakes Trail from State Route 120 which traverses the east base of the peak. History This mountain's toponym was officially adopted by the United States Board on Geographic Names to honor Andrew Jack Gaylor (1846–1921), one of Yosemite's first park rangers. He died of a heart attack on April 19, 1921, while on pat ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
James Dwight Dana
James Dwight Dana Royal Society of London, FRS FRSE (February 12, 1813 – April 14, 1895) was an American geologist, mineralogist, volcanologist, and zoologist. He made pioneering studies of mountain-building, volcano, volcanic activity, and the origin and structure of continents and oceans around the world. His zoological author abbreviation is Dana. Early life and career Dana was born February 12, 1813, in Utica, New York. His father was merchant James Dana (1780–1860) and his mother was Harriet Dwight (1792–1870). Through his mother he was related to the Dwight New England family of missionaries and educators including uncle Harrison Gray Otis Dwight and first cousin Henry Otis Dwight. He showed an early interest in science, which had been fostered by Fay Edgerton, a teacher in the Utica high school, and in 1830 he entered Yale College in order to study under Benjamin Silliman the elder. Graduating in 1833, for the next two years he was teacher of mathematics to midshi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Tree Line
The tree line is the edge of the habitat at which trees are capable of growing. It is found at high elevations and high latitudes. Beyond the tree line, trees cannot tolerate the environmental conditions (usually cold temperatures, extreme snowpack, or associated lack of available moisture). The tree line is sometimes distinguished from a lower timberline, which is the line below which trees form a forest with a closed Canopy (biology), canopy. At the tree line, tree growth is often sparse, stunted, and deformed by wind and cold. This is sometimes known as ''krummholz'' (German for "crooked wood"). The tree line often appears well-defined, but it can be a more gradual transition. Trees grow shorter and often at lower densities as they approach the tree line, above which they are unable to grow at all. Given a certain latitude, the tree line is approximately 300 to 1000 meters below the permanent snow line and roughly parallel to it. Causes Due to their vertical structure, tree ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Tioga Peak
Tioga Peak is located in Mono County, California, approximately two miles outside of Yosemite National Park. It is situated in the Hoover Wilderness on land managed by Inyo National Forest. The location of Tioga Peak Tioga Peak is three miles north-northeast of Tioga Pass, at the head of Lee Vining Canyon. Highway 120 traverses its south and east slopes. It is easily accessible, a to class 2 scramble, from Gardisky Lake. The summit is like a rolling dome. It has some of the best views of the Tioga Pass region. Both Mount Dana and Tioga Pass are visible from the summit. Tioga Peak is a rounded peak, made of metamorphic rock. Climate Tioga Peak is located in an alpine climate zone. Most weather fronts originate in the Pacific Ocean, and travel east toward the Sierra Nevada mountains. As fronts approach, they are forced upward by the peaks (orographic lift), causing moisture in the form of rain or snowfall to drop onto the range. Precipitation runoff from this mountain drain ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mono Lake
Mono Lake ( ) is a saline soda lake in Mono County, California, formed at least 760,000 years ago as a terminal lake in an endorheic basin. The lack of an outlet causes high levels of salts to accumulate in the lake which make its water alkaline. The desert lake has an unusually productive ecosystem based on brine shrimp, which thrive in its waters, and provides critical habitat for two million annual migratory birds that feed on the shrimp and alkali flies ('' Ephydra hians''). Historically, the native Kutzadika'a people ate the alkali flies' pupae, which live in the shallow waters around the edge of the lake. When the city of Los Angeles diverted water from the freshwater streams flowing into the lake, it lowered the lake level, which imperiled the migratory birds. The Mono Lake Committee formed in response and won a legal battle that forced Los Angeles to partially replenish the lake level. Geology Mono Lake occupies part of the Mono Basin, an endorheic basin that has ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Dana Meadows (California)
The Dana Meadows can be found at the eastern entrance to Yosemite National Park, at the foot of Mount Dana, not far from Tuolumne Meadows and the Tioga Pass entrance station. Description The Dana Fork of the Tuolumne River originates adjacent to the meadows, and flows west through them towards its junction with the Lyell Fork of the Tuolumne River. At an altitude of 9,728 feet (2,965 m), the meadow can be covered in snow up to 162 inches (411 cm) deep in wintertime. In June or July, it is springtime in these meadows, but snow can come at any time, especially after 1 September. Before Yosemite became a park, Basque sheepherders would graze their flocks here, and in other areas of the Sierra Nevada. Often lonely, they would carve their initials into the trees of the meadow, several of which are still visible. (In hunting season, some animals of the Sierra, such as the deer, have learned to migrate into the park.) The meadows are named for James Dwight Dana (1 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Dana Glacier (California)
The Dana Glacier is located inside a northwest facing cirque located east of the 13,061 feet (3,981 m) Mount Dana on the eastern border of Yosemite National Park, California. It is very close to Tioga Pass and Highway 120. The glacier occupies the very steep, shaded western slope of the cirque at around 11,500 to 11,800 feet (3,500–3,600 m), although a part of it reaches up to 12,500 feet (3,800 m) (Dana Couloir). Google Earth elevation for GNIS coordinates. Repeat photography comparing images taken in 1883 with those from 2004 demonstrate that the glacier has retreated substantially in that period. See also *List of glaciers in the United States This is a list of glaciers existing in the United States, currently or in recent centuries. These glaciers are located in nine states, all in the Rocky Mountains or farther west. The southernmost named glacier among them is the Lilliput Glacier ... Cited references Glaciers of California Glaciers of Mono Cou ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mesozoic Era
The Mesozoic Era ( ), also called the Age of Reptiles, the Age of Conifers, and colloquially as the Age of the Dinosaurs is the second-to-last Era (geology), era of Earth's Geologic time scale, geological history, lasting from about , comprising the Triassic, Jurassic and Cretaceous Period (geology), Periods. It is characterized by the dominance of archosaurian reptiles, like the dinosaurs; an abundance of conifers and ferns; a hot Greenhouse and icehouse earth, greenhouse climate; and the tectonic break-up of Pangaea. The Mesozoic is the middle of the three eras since Cambrian explosion, complex life evolved: the Paleozoic, the Mesozoic, and the Cenozoic. The era began in the wake of the Permian–Triassic extinction event, the largest well-documented mass extinction in Earth's history, and ended with the Cretaceous–Paleogene extinction event, another mass extinction whose victims included the non-avian dinosaurs, Pterosaur, pterosaurs, Mosasaur, mosasaurs, and Plesiosaur, ples ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Metamorphic Rock
Metamorphic rocks arise from the transformation of existing rock to new types of rock in a process called metamorphism. The original rock (protolith) is subjected to temperatures greater than and, often, elevated pressure of or more, causing profound physical or chemical changes. During this process, the rock remains mostly in the solid state, but gradually recrystallizes to a new texture or mineral composition. The protolith may be an igneous, sedimentary, or existing metamorphic rock. Metamorphic rocks make up a large part of the Earth's crust and form 12% of the Earth's land surface. They are classified by their protolith, their chemical and mineral makeup, and their texture. They may be formed simply by being deeply buried beneath the Earth's surface, where they are subject to high temperatures and the great pressure of the rock layers above. They can also form from tectonic processes such as continental collisions, which cause horizontal pressure, friction, and distorti ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Batholith
A batholith () is a large mass of intrusive igneous rock (also called plutonic rock), larger than in area, that forms from cooled magma deep in Earth's crust. Batholiths are almost always made mostly of felsic or intermediate rock types, such as granite, quartz monzonite, or diorite (see also ''granite dome''). Formation Although they may appear uniform, batholiths are in fact structures with complex histories and compositions. They are composed of multiple masses, or ''plutons'', bodies of igneous rock of irregular dimensions (typically at least several kilometers) that can be distinguished from adjacent igneous rock by some combination of criteria including age, composition, texture, or mappable structures. Individual plutons are solidified from magma that traveled toward the surface from a zone of partial melting near the base of the Earth's crust. Traditionally, these plutons have been considered to form by ascent of relatively buoyant magma in large masses called ''p ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Wilderness Press
Wilderness Press is a publisher of outdoor guidebooks and maps that was founded in Berkeley, California in 1967. Its first publication was ''Sierra North'' (1967/2005). Reissued in 2005, this is considered the authoritative guidebook for hikers and backpackers in the Northern Sierra Nevada. Since the debut of ''Sierra North'' in 1967, Wilderness Press has become well known for its outdoor titles, guidebooks, and maps.https://news.google.com/newspapers?id=RDwuAAAAIBAJ&sjid=WNcFAAAAIBAJ&pg=997,5780000&dq=wilderness-press&hl=en It has been owned by Keen Communications since 2008, and headquarters have moved to Birmingham, Alabama. Select bibliography *''Walking Brooklyn ''Walking Brooklyn: 30 Tours Exploring Historical Legacies, Neighborhood Culture, Side Streets, and Waterways'' is a book by Adrienne Onofri. It was published in June 2007 by Wilderness Press as one of the first titles in their urban trekking seri ...'' References External links * Book publishing companies b ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
