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Mud Creek Glacier
The Mud Creek Glacier is the southernmost glacier on Mount Shasta in the U.S. state of California. It lies to the east of Sargents Ridge on Shastarama point near above sea level. The glacier is smaller than the northern ones on Mount Shasta such as Whitney, Hotlum, Bolam, and Wintun Glaciers. There are approximately 80 glaciers in California and unlike the glaciers in Alaska, Colorado and Montana. California’s existing current glaciers are not remnants of the Pleistocene, but instead relatively young approximately 1,000 years in age. The Mud Creek Glacier is one of at least 7 recognized glaciers on Mt. Shasta by the United States Geological Survey (USGS) the rest being: Whitney, Hotlum, Bolam, Wintun, Konwakiton, and Watkins. History In 1871, Clarence King first described the glaciers of Mt. Shasta in a scientific journal he wrote about the Pacific Northwest after summiting Mt. Shasta. In 1936 the USGS was mapping Mt. Shasta disregarding the Mud Creek Glacier along with ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mount Shasta
Mount Shasta ( Shasta: ''Waka-nunee-Tuki-wuki''; Karuk: ''Úytaahkoo'') is a potentially active volcano at the southern end of the Cascade Range in Siskiyou County, California. At an elevation of , it is the second-highest peak in the Cascades and the fifth-highest in the state. Mount Shasta has an estimated volume of , which makes it the most voluminous stratovolcano in the Cascade Volcanic Arc. The mountain and surrounding area are part of the Shasta–Trinity National Forest. Description Mount Shasta is connected to its satellite cone of Shastina, and together they dominate the landscape. Shasta rises abruptly to tower nearly above its surroundings. On a clear winter day, the mountain can be seen from the floor of the Central Valley to the south. The mountain has attracted the attention of poets, authors, and presidents. The mountain consists of four overlapping dormant volcanic cones that have built a complex shape, including the main summit and the prominent and visi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Icefall
An icefall is a portion of certain glaciers characterized by relatively rapid flow and chaotic crevassed surface, caused in part by gravity. The term ''icefall'' is formed by analogy with the word ''waterfall'', which is a similar phenomenon of the liquid phase but at a more spectacular speed. When ice movement of a glacier is faster than elsewhere, because the glacier bed steepens or narrows, and the flow cannot be accommodated by plastic deformation, the ice fractures, forming crevasses. Where two fractures meet, seracs (or ice towers) can be formed. When the movement of the ice slows down, the crevasses can coalesce, resulting in the surface of the glacier becoming smoother. Ice flow Perhaps the most conspicuous consequence of glacier flow, icefalls occur where the glacier bed steepens and/or narrows. Most glacier ice flows at speeds of a few hundred metres per year or less. However, the flow of ice in an icefall may be measured in kilometres per year. Such rapid flow cannot ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Glaciers Of Siskiyou County, California
A glacier (; ) is a persistent body of dense ice that is constantly moving under its own weight. A glacier forms where the accumulation of snow exceeds its ablation over many years, often centuries. It acquires distinguishing features, such as crevasses and seracs, as it slowly flows and deforms under stresses induced by its weight. As it moves, it abrades rock and debris from its substrate to create landforms such as cirques, moraines, or fjords. Although a glacier may flow into a body of water, it forms only on land and is distinct from the much thinner sea ice and lake ice that form on the surface of bodies of water. On Earth, 99% of glacial ice is contained within vast ice sheets (also known as "continental glaciers") in the polar regions, but glaciers may be found in mountain ranges on every continent other than the Australian mainland, including Oceania's high-latitude oceanic island countries such as New Zealand. Between latitudes 35°N and 35°S, glaciers occur only ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
List Of Glaciers
A glacier ( ) or () is a persistent body of dense ice that is constantly moving under its own weight; it forms where the accumulation of snow exceeds its ablation (melting and sublimation) over many years, often centuries. Glaciers slowly deform and flow due to stresses induced by their weight, creating crevasses, seracs, and other distinguishing features. Because glacial mass is affected by long-term climate changes, e.g., precipitation, mean temperature, and cloud cover, glacial mass changes are considered among the most sensitive indicators of climate change. There are about 198,000 to 200,000 glaciers in the world. Glaciers by continent Africa Africa, specifically East Africa, has contained glacial regions, possibly as far back as the last glacier maximum 10 to 15 thousand years ago. Seasonal snow does exist on the highest peaks of East Africa as well as in the Drakensberg Range of South Africa, the Stormberg Mountains, and the Atlas Mountains in Morocco. Currently, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Igneous Rock
Igneous rock (derived from the Latin word ''ignis'' meaning fire), or magmatic rock, is one of the three main The three types of rocks, rock types, the others being Sedimentary rock, sedimentary and metamorphic rock, metamorphic. Igneous rock is formed through the cooling and solidification of magma or lava. The magma can be derived from Partial melting, partial melts of existing rocks in either a Terrestrial planet, planet's mantle (geology), mantle or crust (geology), crust. Typically, the melting is caused by one or more of three processes: an increase in temperature, a decrease in pressure, or a change in composition. Solidification into rock occurs either below the surface as intrusive rocks or on the surface as extrusive (geology), extrusive rocks. Igneous rock may form with crystallization to form granular, crystalline rocks, or without crystallization to form Volcanic glass, natural glasses. Igneous rocks occur in a wide range of geological settings: shields, platforms ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Intermediate Composition
In igneous petrology, an intermediate composition refers to the chemical composition of a rock that has 5263 wt% SiO2 being an intermediate between felsic and mafic compositions. Typical intermediate rocks include andesite, dacite, and trachyandesite among volcanic rocks and diorite and granodiorite among plutonic rocks Intrusive rock is formed when magma penetrates existing rock, crystallizes, and solidifies underground to form '' intrusions'', such as batholiths, dikes, sills, laccoliths, and volcanic necks.Intrusive RocksIntrusive rocks accessdate: March .... References Geochemistry Igneous rocks Intermediate rocks {{petrology-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Shasta, California
Shasta is a census-designated place (CDP) in Shasta County, California, United States. Shasta sits at an elevation of . Its population is 1,043 as of the 2020 census, down from 1,771 from the 2010 census. Shasta State Historic Park located at Shasta is a ghost town and California State Historic Park. History A bustling town of the 1850s through the 1880s, Shasta was for its time, the largest settlement in Shasta County and the surrounding area. Sometimes referred to today as "Old Shasta", the town was an important commercial center and a major shipping point for mule trains and stagecoaches serving the mining towns and later settlements of northern California. The discovery of gold near Shasta in 1848 brought California Gold Rush-era Forty-Niners up the Siskiyou Trail in search of riches - most passed through Shasta, and continued to use it as base of operations. Those that stayed worked the placer gold diggings of nearby, short-lived camps like Horsetown, Buckeye, and Whiske ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Dunsmuir, California
Dunsmuir is a city in Siskiyou County, northern California. It is on the upper Sacramento River in the Trinity Mountains. Its population is 1,707 as of the 2020 census, up from 1,650 from the 2010 census. Dunsmuir is currently a hub for tourism in Northern California, with Interstate 5 passing through it. Visitors enjoy fishing, skiing, climbing, or sight-seeing. During the steam locomotive railroad era, it was notable for being the site of an important Central Pacific (and later Southern Pacific) railroad yard, where extra steam locomotives were added to assist trains on the grade to the north. Commerce and tourism Located in the Shasta Cascade area of Northern California, Dunsmuir is a popular destination for tourists. Visitors come to fish trout in the Sacramento and McCloud Rivers, or to see and climb Mount Shasta, Castle Crags or the Trinity Alps. Visitors ski (both alpine and cross-country) and bicycle, or can hike to the waterfalls, streams and lakes in the area, inc ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
McCloud, California
McCloud is a small town and census-designated place (CDP) in Siskiyou County, California, United States. Its population is 945 as of the 2020 census, down from 1,101 from the 2010 census. Commerce and tourism Located in the Shasta Cascade area of Northern California, McCloud sees many visitors. Visitors use McCloud as a base to engage in nationally recognized trout fishing in the nearby McCloud, Sacramento, p. 92. Excerpts of the text of this book are availablherecourtesy of Google Books, and KlamathSiskiyou County information site accessed 2008-02-21. Rivers, or come to see and climb , [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Weed, California
Weed is a city in Siskiyou County, California, United States. As of the 2020 Census, the city had a total population of 2,862, down from 2,967 in 2010. There are several unincorporated communities adjacent to, or just outside, Weed proper, including Edgewood, Carrick, and Lake Shastina. These communities generally have mailing addresses that use Weed or its ZIP code. Weed is about west-northwest of Mount Shasta, a prominent northern California landmark, and the second-tallest volcano in the Cascade Range. Weed's city motto is "Weed like to welcome you". Weed has frequently been noted on lists of unusual place names. History The City of Weed derives its name from the founder of the local lumber mill and pioneer Abner Weed, who discovered that the area's strong winds were helpful in drying lumber. In 1897, Abner Weed bought the Siskiyou Lumber and Mercantile Mill and of land in what is now the City of Weed, for $400. By the 1940s Weed boasted the world's largest sawmill. Bo ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Scree
Scree is a collection of broken rock fragments at the base of a cliff or other steep rocky mass that has accumulated through periodic rockfall. Landforms associated with these materials are often called talus deposits. Talus deposits typically have a concave upwards form, where the maximum inclination corresponds to the angle of repose of the mean debris particle size. The exact definition of scree in the primary literature is somewhat relaxed, and it often overlaps with both ''talus'' and ''colluvium''. The term ''scree'' comes from the Old Norse term for landslide, ''skriða'', while the term ''talus'' is a French word meaning a slope or embankment. In high-altitude arctic and subarctic regions, scree slopes and talus deposits are typically adjacent to hills and river valleys. These steep slopes usually originate from late-Pleistocene periglacial processes. Notable scree sites in Eastern North America include the Ice Caves at White Rocks National Recreation Area in southern Ve ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hanging Valley
A valley is an elongated low area often running between hills or mountains, which will typically contain a river or stream running from one end to the other. Most valleys are formed by erosion of the land surface by rivers or streams over a very long period. Some valleys are formed through erosion by glacial ice. These glaciers may remain present in valleys in high mountains or polar areas. At lower latitudes and altitudes, these glacially formed valleys may have been created or enlarged during ice ages but now are ice-free and occupied by streams or rivers. In desert areas, valleys may be entirely dry or carry a watercourse only rarely. In areas of limestone bedrock, dry valleys may also result from drainage now taking place underground rather than at the surface. Rift valleys arise principally from earth movements, rather than erosion. Many different types of valleys are described by geographers, using terms that may be global in use or else applied only locally. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
