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Rockaway Beach, California
Rockaway Beach is a shoreline area of the Pacific Ocean in the southern portion of Pacifica, California, United States, approximately south of the city of San Francisco. It is located within a gently curving embayment with direct access via Rockaway Beach Avenue and providing easy access to Highway 1. The beach itself is a popular place to visit with many restaurant and shopping venues although erosion has decreased its size over the years. It is noted for its scenic overlook, and is one of the cleanest beaches in the San Francisco Bay Area.Bay Area beaches grade well for safe swimming May 27, 2010 by Carolyn Jones, San Francisco Chronicle History There are no known prehistoric remains in Rockaway Beach itself; however, the site of the[...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Rockaway Beach, Pacifica, CA
Rockaway may refer to: Places in the United States *Rockaway Beach (other) New Jersey *Rockaway, New Jersey, a borough in Morris County *Rockaway Township, New Jersey, a township in Morris County *Rockaway Creek (New Jersey), a tributary of the Lamington River in Hunterdon County *Rockaway River, a tributary of the Passaic River New York *Rockaway, Queens, a peninsula in the New York City borough of Queens, on Long Island **Far Rockaway, Queens, a neighborhood on the Rockaway peninsula *Rockaway Avenue (other), subway stations in Brooklyn, New York City *Rockaway Boulevard, a boulevard in Southern Queens *Rockaway Inlet, a strait off Long Island, New York *Rockaway Parkway, a parkway in Brooklyn *East Rockaway, New York, a village in Nassau County on Long Island Elsewhere *Rockaway, Ohio, an unincorporated community *Rockaway Creek (California) Ships * , a United States Navy seaplane tender in commission from 1943 to 1946 * , a United States Coast Guard cutter ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
San Pedro Valley (California)
The San Pedro Valley of western Cochise County, Arizona, is a , mostly north–south valley, trending northwesterly. The San Pedro River drains from the state of Sonora, Mexico, through Benson, Arizona, and the southeast of the Rincon Mountains. The coordinates for Charleston, Arizona, south center of the valley are . See also * San Pedro Valley Railroad * Tres Alamos, Arizona Tres Alamos is a ghost town in Cochise County, Arizona, Cochise County in the U.S. state of Arizona. The town was settled in 1874 in what was then the Arizona Territory. History In 1768 Spanish soldiers from the Presidio de Tucson farmed the ar ... References {{Authority control Landforms of Cochise County, Arizona Landforms of Sonora Valleys of Arizona Valleys of Mexico ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Alluvial
Alluvium (from Latin ''alluvius'', from ''alluere'' 'to wash against') is loose clay, silt, sand, or gravel that has been deposited by running water in a stream bed, on a floodplain, in an alluvial fan or beach, or in similar settings. Alluvium is also sometimes called alluvial deposit. Alluvium is typically geologically young and is not consolidated into solid rock. Sediments deposited underwater, in seas, estuaries, lakes, or ponds, are not described as alluvium. Floodplain alluvium can be highly fertile, and supported some of the earliest human civilizations. Definitions The present consensus is that "alluvium" refers to loose sediments of all types deposited by running water in floodplains or in alluvial fans or related landforms. However, the meaning of the term has varied considerably since it was first defined in the French dictionary of Antoine Furetière, posthumously published in 1690. Drawing upon concepts from Roman law, Furetière defined ''alluvion'' (the F ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Volcanic
A volcano is a rupture in the crust of a planetary-mass object, such as Earth, that allows hot lava, volcanic ash, and gases to escape from a magma chamber below the surface. On Earth, volcanoes are most often found where tectonic plates are diverging or converging, and most are found underwater. For example, a mid-ocean ridge, such as the Mid-Atlantic Ridge, has volcanoes caused by divergent tectonic plates whereas the Pacific Ring of Fire has volcanoes caused by convergent tectonic plates. Volcanoes can also form where there is stretching and thinning of the crust's plates, such as in the East African Rift and the Wells Gray-Clearwater volcanic field and Rio Grande rift in North America. Volcanism away from plate boundaries has been postulated to arise from upwelling diapirs from the core–mantle boundary, deep in the Earth. This results in hotspot volcanism, of which the Hawaiian hotspot is an example. Volcanoes are usually not created where two tectonic plate ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Greenstone Belt
Greenstone belts are zones of variably metamorphosed mafic to ultramafic volcanic sequences with associated sedimentary rocks that occur within Archaean and Proterozoic cratons between granite and gneiss bodies. The name comes from the green hue imparted by the colour of the metamorphic minerals within the mafic rocks: the typical green minerals are chlorite, actinolite, and other green amphiboles. Greenstone belts also often contain ore deposits of gold, silver, copper, zinc and lead. A greenstone belt is typically several dozens to several thousand kilometres long. Typically, a greenstone belt within the greater volume of otherwise homogeneous granite-gneiss within a craton contains a significantly larger degree of heterogeneity and complications and forms a tectonic marker far more distinct than the much more voluminous and homogeneous granites. Additionally, a greenstone belt contains far more information on tectonic and metamorphic events, deformations, and paleogeologic ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sunset At Rockaway Beach In Pacifica
Sunset, also known as sundown, is the daily disappearance of the Sun below the horizon due to Earth's rotation. As viewed from everywhere on Earth (except the North and South poles), the equinox Sun sets due west at the moment of both the spring and autumn equinoxes. As viewed from the Northern Hemisphere, the Sun sets to the northwest (or not at all) in the spring and summer, and to the southwest in the autumn and winter; these seasons are reversed for the Southern Hemisphere. The time of sunset is defined in astronomy as the moment when the upper limb of the Sun disappears below the horizon. Near the horizon, atmospheric refraction causes sunlight rays to be distorted to such an extent that geometrically the solar disk is already about one diameter below the horizon when a sunset is observed. Sunset is distinct from twilight, which is divided into three stages. The first one is ''civil twilight'', which begins once the Sun has disappeared below the horizon, and continues unti ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Quarry Products
A quarry is a type of open-pit mine Open-pit mining, also known as open-cast or open-cut mining and in larger contexts mega-mining, is a surface mining technique of extracting rock or minerals from the earth from an open-air pit, sometimes known as a borrow. This form of mining ... in which dimension stone, rock (geology), rock, construction aggregate, riprap, sand, gravel, or slate is excavated from the ground. The operation of quarries is regulated in some jurisdictions to reduce their environmental impact. The word ''quarry'' can also include the underground quarrying for stone, such as Bath stone. Types of rock Types of rock extracted from quarries include: *Chalk *China clay *Scoria, Cinder *Clay *Coal *Construction aggregate (sand and gravel) *Coquina *Diabase *Gabbro *Granite *Gritstone *Gypsum *Limestone *Marble *Ores *Phosphate rock *Quartz *Sandstone *Slate *Travertine Stone quarry Stone quarry is an outdated term for mining construction rocks (lime ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Rhodes And Jamison
Rhodes (; el, Ρόδος , translit=Ródos ) is the largest and the historical capital of the Dodecanese islands of Greece. Administratively, the island forms a separate municipality within the Rhodes regional unit, which is part of the South Aegean administrative region. The principal town of the island and seat of the municipality is Rhodes. The city of Rhodes had 50,636 inhabitants in 2011. In 2022 the island has population of 124,851 people. It is located northeast of Crete, southeast of Athens. Rhodes has several nicknames, such as "Island of the Sun" due to its patron sun god Helios, "The Pearl Island", and "The Island of the Knights", named after the Knights of Saint John of Jerusalem, who ruled the island from 1310 to 1522. Historically, Rhodes was famous for the Colossus of Rhodes, one of the Seven Wonders of the Ancient World. The Medieval Old Town of the City of Rhodes has been declared a World Heritage Site. Today, it is one of the most popular tourist destinat ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ideal Cement
Ideal may refer to: Philosophy * Ideal (ethics), values that one actively pursues as goals * Platonic ideal, a philosophical idea of trueness of form, associated with Plato Mathematics * Ideal (ring theory), special subsets of a ring considered in abstract algebra * Ideal, special subsets of a semigroup * Ideal (order theory), special kind of lower sets of an order * Ideal (set theory), a collection of sets regarded as "small" or "negligible" * Ideal (Lie algebra), a particular subset in a Lie algebra * Ideal point, a boundary point in hyperbolic geometry * Ideal triangle, a triangle in hyperbolic geometry whose vertices are ideal points Science * Ideal chain, in science, the simplest model describing a polymer * Ideal gas law, in physics, governing the pressure of an ideal gas * Ideal transformer, an electrical transformer having zero resistance and perfect magnetic threading * Ideal final result, in TRIZ methodology, the best possible solution * Thought experiment, someti ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Montara, California
Montara () is a census-designated place (CDP) in San Mateo County, California, United States. The population was 2,833 at the 2020 census. Nearby communities include Moss Beach and Princeton-by-the-Sea. Etymology According to historical sources, the name "Montoro" was initially used for Montara Mountain and Montara Point by the Whitney Survey, also known as the California Geological Survey, in 1867. In 1869, the United States Coast Survey referred to the area with its current name. The name is thought to be a misspelling of several Spanish words that describe mountains and forests, such as montuoso, montaraz, and montaña. It could also refer to a corruption of the Spanish word "Montosa"; "Cañada Montosa" (valley of brush) was allegedly written on an 1838 design of Rancho San Pedro, located in Southern California, but the connections between this plan and the town are unclear. Geography and environment Montara is located at (37.539639, -122.506426), approximately south of ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Landslide
Landslides, also known as landslips, are several forms of mass wasting that may include a wide range of ground movements, such as rockfalls, deep-seated grade (slope), slope failures, mudflows, and debris flows. Landslides occur in a variety of environments, characterized by either steep or gentle slope gradients, from mountain ranges to coastal cliffs or even underwater, in which case they are called submarine landslides. Gravity is the primary driving force for a landslide to occur, but there are other factors affecting slope stability that produce specific conditions that make a slope prone to failure. In many cases, the landslide is triggered by a specific event (such as a heavy rainfall, an earthquake, a slope cut to build a road, and many others), although this is not always identifiable. Causes Landslides occur when the slope (or a portion of it) undergoes some processes that change its condition from stable to unstable. This is essentially due to a decrease in the She ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Trackbed
The track bed or trackbed is the groundwork onto which a railway track is laid. Trackbeds of disused railways are sometimes used for recreational paths or new light rail links. According to Network Rail, the trackbed is the layers of ballast and sub-ballast above a prepared subgrade/formation (see diagram). It is designed primarily to reduce the stress on the subgrade. Other definitions include the surface of the ballast on which the track is laid,, p. 386. the area left after a track has been dismantled and the ballast removed or the track formation beneath the ballast and above the natural ground. The trackbed can significantly influence the performance of the track, especially ride quality of passenger services. See also * Embankment (transportation) * Roadbed * Subgrade In transport engineering, subgrade is the native material underneath a constructed road,http://www.highwaysmaintenance.com/drainage.htm The Idiots' Guide to Highways Maintenance ''highwaysmaintenence. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
