|
Santa Monica Mountains
The Santa Monica Mountains are a coastal mountain range in Southern California, next to the Pacific Ocean. It is part of the Transverse Ranges. The Santa Monica Mountains National Recreation Area encompasses this mountain range. Because of its proximity to densely populated regions, it is one of the most visited natural areas in California. Geography The range extends approximately east-west from the Hollywood Hills in Los Angeles to Point Mugu in Ventura County. The western mountains, separating the Conejo Valley from Malibu, suddenly end at Mugu Peak as the rugged, nearly impassible shoreline gives way to tidal lagoons and coastal sand dunes of the alluvial Oxnard Plain. The mountain range contributed to the isolation of this vast coastal plain before regular transportation routes reached western Ventura County. The eastern mountains form a barrier between the San Fernando Valley and the Los Angeles Basin, separating "the Valley" on the north and west-central Los Angeles ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Malibu Canyon
Malibu Creek is a year-round stream in western Los Angeles County, California. It drains the southern Conejo Valley and Simi Hills, flowing south through the Santa Monica Mountains, and enters Santa Monica Bay in Malibu. Distribution The Malibu Creek watershed drains and its tributary creeks reach as high as into Ventura County. The creek's mainstem begins south of Westlake Village at the confluence of Triunfo Creek and Lobo Canyon Creek, and flows U.S. Geological Survey. National Hydrography Dataset high-resolution flowline dataThe National Map, accessed March 16, 2011 to Malibu Lagoon. Malibu Canyon is a chief pass through the mountains, and Malibu Canyon Road is a major north–south route connecting the coast to the inland valley. Malibu Creek starts at Malibou Lake, which is held back by the Malibu Lake Dam. Further downstream, the creek waterfalls over the Rindge Dam, then carves its final path into Malibu Lagoon. History The area around Malibu Creek was for ce ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Santa Monica Mountains Fund
The Santa Monica Mountains National Recreation Area (SMMNRA) is a national recreation area containing many individual parks and open space preserves, located primarily in Southern California's Santa Monica Mountains. Located in greater Los Angeles, two thirds of SMMNRA's parklands are in northwest Los Angeles County and the remaining third, including a Simi Hills extension, is in southeastern Ventura County. It is administered by the National Park Service in coordination with state, county, municipal, and university agencies. In size, the Santa Monica Mountains National Recreation Area is the largest urban national park in the world. It is also one of the best examples of a Mediterranean climate ecosystem and it protects one of the highest densities of archaeological resources in any mountain range in the world.National Park Service, ''Santa Monica Mountains National Recreation Area: Statement of National Significance'', ca. 2000, page 4 Geography The Santa Monica Mountains NRA ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Archeology
Archaeology or archeology is the study of human activity through the recovery and analysis of material culture. The archaeological record consists of artifacts, architecture, biofacts or ecofacts, sites, and cultural landscapes. Archaeology can be considered both a social science and a branch of the humanities. It is usually considered an independent academic discipline, but may also be classified as part of anthropology (in North America – the four-field approach), history or geography. The discipline involves surveying, excavation, and eventually analysis of data collected, to learn more about the past. In broad scope, archaeology relies on cross-disciplinary research. Archaeologists study human prehistory and history, from the development of the first stone tools at Lomekwi in East Africa 3.3 million years ago up until recent decades. Archaeology is distinct from palaeontology, which is the study of fossil remains. Archaeology is particularly important for lear ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Elysian Park
Elysian Park is one of the largest parks in Los Angeles, California, United States, at 600 acres (240 ha). Most of Elysian Park falls in the neighborhood of the same name, but a small portion of the park falls in Echo Park. The park was created by city ordinance on April 5, 1886. City engineer George Hansen sponsored the ordinance. The land was considered "worthless" at the time and only a few other parks existed within the Los Angeles city limits. For some time the land sat unimproved, but eventually roads, trails, and landscaping was added. Parts of Elysian Park were swapped for other lands held by the Los Angeles Dodgers when Dodger Stadium was built. Notable features Angels Point is a small hill in Elysian Park overlooking Dodger Stadium and the Downtown Los Angeles skyline. Atop the hill is a large metal sculpture art installation by local artist Peter Shire of the 1980s postmodern Memphis Group. Chavez Ravine Arboretum opened in 1893 and contains more than 100 varietie ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Los Angeles River
The Los Angeles River (), historically known as by the Tongva and the by the Spanish, is a major river in Los Angeles County, California. Its headwaters are in the Simi Hills and Santa Susana Mountains, and it flows nearly from Canoga Park, Los Angeles, California, Canoga Park through the San Fernando Valley, downtown Los Angeles, and the Gateway Cities to its mouth in Long Beach, California, Long Beach, where it flows into San Pedro Bay (California), San Pedro Bay. While the river was once free-flowing and frequently flooding, forming alluvial flood plains along its banks, it currently flows through a concrete channel on a fixed course, which was built after a series of devastating floods in the early 20th century. Before the opening of the Los Angeles Aqueduct, the river was the primary source of fresh water for the city. Although the Los Angeles region still receives some water from the river and other local sources, most of the water supply flows from several aqueducts ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Parallel (geometry)
In geometry, parallel lines are coplanar infinite straight line (geometry), lines that do not intersecting lines, intersect at any point. Parallel planes are plane (geometry), planes in the same three-dimensional space that never meet. ''Parallel curves'' are curves that do not tangent, touch each other or intersect and keep a fixed minimum distance. In three-dimensional Euclidean space, a line and a plane that do not share a point are also said to be parallel. However, two noncoplanar lines are called ''skew lines''. Line segments and Euclidean vectors are parallel if they have the same direction (geometry), direction or opposite direction (geometry), opposite direction (not necessarily the same length). Parallel lines are the subject of Euclid's parallel postulate. Parallelism is primarily a property of affine geometry, affine geometries and Euclidean geometry is a special instance of this type of geometry. In some other geometries, such as hyperbolic geometry, lines can have ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Los Angeles Basin
The Los Angeles Basin is a sedimentary Structural basin, basin located in Southern California, in a region known as the Peninsular Ranges. The basin is also connected to an wikt:anomalous, anomalous group of east–west trending chains of mountains collectively known as the Transverse Ranges. The present basin is a coastal lowland area, whose floor is marked by elongate low ridges and groups of hills that is located on the edge of the Pacific plate. The Los Angeles Basin, along with the Santa Barbara Channel, the Oxnard Plain, Ventura Basin, the San Fernando Valley, and the San Gabriel Valley, San Gabriel Basin, lies within the greater Southern California region. The majority of the jurisdictional land area of the city of Los Angeles physically lies within this basin. On the north, northeast, and east, the lowland Drainage basin, basin is bound by the Santa Monica Mountains and Puente, Elysian, and Repetto hills. To the southeast, the basin is bordered by the Santa Ana Mountains a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
San Fernando Valley
The San Fernando Valley, known locally as the Valley, is an urbanized valley in Los Angeles County, Los Angeles County, California. Situated to the north of the Los Angeles Basin, it comprises a large portion of Los Angeles, the Municipal corporation, incorporated cities of Burbank, California, Burbank, Calabasas, California, Calabasas, Glendale, California, Glendale, Hidden Hills, California, Hidden Hills and San Fernando, California, San Fernando, plus several unincorporated areas. The valley is the home of Warner Bros. Studios Burbank, Warner Bros. Studios, Walt Disney Studios (Burbank), Walt Disney Studios, and the Universal Studios Hollywood theme park. Geography The valley of San Fernando is an area of , bounded by the San Gabriel Mountains in the northeast, the Verdugo Mountains in the east, the Santa Monica Mountains and Chalk Hills in the south, the Simi Hills in the west, and the Santa Susana Mountains in the northwest. The northern Sierra Pelona Mountains, northweste ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Coastal Plain
A coastal plain (also coastal plains, coastal lowland, coastal lowlands) is an area of flat, low-lying land adjacent to a sea coast. A fall line commonly marks the border between a coastal plain and an upland area. Formation Coastal plains can form in one of two ways; some begin as a continental shelf, a flat piece of land located below sea level, and are created when the ocean level falls, exposing the land. Others develop when river currents carry sediment into the ocean, which is deposited and builds up over time until it forms a coastal plain. They are generally separated from the rest of the interior by proximate landforms, like mountains. Locations Some of the largest coastal plains are in Alaska and the southeastern United States. The Gulf Coastal Plain of North America extends northwards from the Gulf of Mexico along the Lower Mississippi River to the Ohio River, which is a distance of about . The Atlantic Coastal Plain runs from the New York Bight to Florida. The C ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Oxnard Plain
The Oxnard Plain is a large coastal plain in southwest Ventura County, California, United States surrounded by the mountains of the Transverse Ranges. The cities of Oxnard, Camarillo, Port Hueneme and much of Ventura as well as the unincorporated communities of Hollywood Beach, El Rio, Saticoy, Silver Strand Beach, and Somis lie within the over . The population within the plain comprises a majority of the western half of the Oxnard-Thousand Oaks-Ventura Metro Area and includes the largest city along the Central Coast of California. The is among the longest stretches of continuous, linear beaches in the state. The high quality soils, adequate water supply, favorable climate, long growing season, and level topography are characteristic of the Oxnard Plain where the top cash crops are strawberries, raspberries, nursery stock and celery. Ventura County is one of the principal agricultural counties in the state and it is a significant component of the economy with a total ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Alluvial
Alluvium (, ) 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 French term for alluvium) as new land formed by deposition ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sand Dune Ecology
Sand dune ecology describes the biological and physico-chemical interactions that are a characteristic of sand dunes. Sand dune systems are excellent places for biodiversity, partly because they are not very productive for agriculture, and partly because disturbed, stressful, and stable habitats are present in proximity to each other. Many of them are protected as nature reserves, and some are parts of larger conservation areas, incorporating other coastal habitats like salt marshes, mud flats, grasslands, scrub, and woodland. Plant habitat Sand dunes provide a range of habitats for a range of unusual, interesting and characteristic plants that can cope with Disturbance (ecology), disturbed habitats. In the United Kingdom, UK these may include restharrow ''Ononis repens'', sand spurge ''Euphorbia arenaria'' and ragwort ''Senecio vulgaris'' - such plants are termed ruderals. Other very specialised plants are adapted to the accretion of sand, surviving the continual burial of thei ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
