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Perris Block
The Perris Block is the central block of three major fault-bounded blocks of the northern part of the Peninsular Ranges. The Perris Block lies between the Santa Ana Block to the west and the San Jacinto Block to the east. The Perris Block, was named by Walter A. English in 1925 for the city of Perris, located near the center of the block. Structurally stable for millions of years, the Perris Block is an internally unfaulted, eroded mass of Cretaceous and older granitic rocks of the Southern California Batholith and metasedimentary basement rocks. These rocks compose various ranges of mountains and hills and monadnocks and underlie the valleys within it. It is bounded on the west by the Chino Fault and Elsinore Trough, on the east and northeast by the San Jacinto Fault Zone including the San Jacinto Valley graben. It is bounded on the north by the Cucamonga Fault Zone, in the San Bernardino Valley and San Jose Hills Fault in the Pomona Valley. To the south, the Perr ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Fault Block
Fault blocks are very large blocks of rock, sometimes hundreds of kilometres in extent, created by tectonic and localized stresses in Earth's crust. Large areas of bedrock are broken up into blocks by faults. Blocks are characterized by relatively uniform lithology. The largest of these fault blocks are called crustal blocks. Large crustal blocks broken off from tectonic plates are called terranes. Those terranes which are the full thickness of the lithosphere are called microplates. Continent-sized blocks are called variously ''microcontinents, continental ribbons, H-blocks, extensional allochthons and outer highs.'' Because most stresses relate to the tectonic activity of moving plates, most motion between blocks is horizontal, that is parallel to the Earth's crust by strike-slip faults. However vertical movement of blocks produces much more dramatic results. Landforms (mountains, hills, ridges, lakes, valleys, etc.) are sometimes formed when the faults have a large v ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cucamonga Fault Zone
Rancho Cucamonga ( ) is a city located just south of the foothills of the San Gabriel Mountains and Angeles National Forest in San Bernardino County, California, United States. About east of Downtown Los Angeles, Rancho Cucamonga is the 28th most populous city in California. The city's seal, which centers on a cluster of grapes, alludes to the city's agricultural history including wine-making. The city's proximity to major transportation hubs, airports, and highways has attracted the business of several large corporations, including Coca-Cola, Frito-Lay, Big Lots, Mercury Insurance Group, Southern California Edison, and Amphastar Pharmaceuticals. The city had a population of 174,453 according to the 2020 United States Census. The city experiences an average of 287 sunny days per year, compared to a national average of 205 days. Its climate is classified as warm Mediterranean, or ''Csa'', under the Köppen climate classification system. The city's favorable location and ho ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Alfred O
Alfred may refer to: Arts and entertainment *''Alfred J. Kwak'', Dutch-German-Japanese anime television series * ''Alfred'' (Arne opera), a 1740 masque by Thomas Arne * ''Alfred'' (Dvořák), an 1870 opera by Antonín Dvořák *"Alfred (Interlude)" and "Alfred (Outro)", songs by Eminem from the 2020 album ''Music to Be Murdered By'' Business and organisations * Alfred, a radio station in Shaftesbury, England *Alfred Music, an American music publisher *Alfred University, New York, U.S. *The Alfred Hospital, a hospital in Melbourne, Australia People * Alfred (name) includes a list of people and fictional characters called Alfred * Alfred the Great (848/49 – 899), or Alfred I, a king of the West Saxons and of the Anglo-Saxons Places Antarctica * Mount Alfred (Antarctica) Australia * Alfredtown, New South Wales * County of Alfred, South Australia Canada * Alfred and Plantagenet, Ontario * Alfred Island, Nunavut * Mount Alfred, British Columbia United States * Alfred, Maine, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pleistocene
The Pleistocene ( , often referred to as the ''Ice age'') is the geological Epoch (geology), epoch that lasted from about 2,580,000 to 11,700 years ago, spanning the Earth's most recent period of repeated glaciations. Before a change was finally confirmed in 2009 by the International Union of Geological Sciences, the cutoff of the Pleistocene and the preceding Pliocene was regarded as being 1.806 million years Before Present (BP). Publications from earlier years may use either definition of the period. The end of the Pleistocene corresponds with the end of the last glacial period and also with the end of the Paleolithic age used in archaeology. The name is a combination of Ancient Greek grc, label=none, πλεῖστος, pleīstos, most and grc, label=none, καινός, kainós (latinized as ), 'new'. At the end of the preceding Pliocene, the previously isolated North and South American continents were joined by the Isthmus of Panama, causing Great American Interchang ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pliocene
The Pliocene ( ; also Pleiocene) is the epoch in the geologic time scale that extends from 5.333 million to 2.58See the 2014 version of the ICS geologic time scale million years ago. It is the second and most recent epoch of the Neogene Period in the . The Pliocene follows the Epoch and is followed by the Epoch. Prior to the 2009 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Erosion Surface
In geology and geomorphology, an erosion surface is a surface of rock or regolith that was formed by erosion and not by construction (e.g. lava flows, sediment deposition) nor fault displacement. Erosional surfaces within the stratigraphic record are known as unconformities, but not all unconformities are buried erosion surfaces. Erosion surfaces vary in scale and can be formed on a mountain range or a rock. Particularly large and flat erosion surfaces receive the names of peneplain, paleoplain, planation surface or pediplain. An example of erosion surface is road surface erosion which is caused by natural and anthropogenic factors. Erosion surface can be measured through direct, contact measurement methods and indirect, non-contact measurement methods. Road surface erosion Just like mountains and rocks, erosion can also occur on unsealed roads due to natural and anthropogenic factors. Road surface erosion could be caused by snowfall, rainfall and wind. The material and hydr ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Anza, California
Anza is a census-designated place located in southern Riverside County, California, in the Anza Valley, a semi-arid region at a mean elevation of above sea level. It is located south of Idyllwild, east-northeast of Temecula, southwest of Palm Springs, and northeast of San Diego, being traversed by State Route 371. Anza is on the Pacific Crest Trail. The population was 3,075 at the 2020 census. Locally, Anza and several other mountain communities (including Garner Valley, Idyllwild, Pinyon Pines and Aguanga) are collectively referred to as "the Hill." The ZIP code is 92539, and the community is inside area code 951. History It is estimated that the Cahuilla aboriginal tribes inhabited an area including what is today the Anza Valley more than two thousand years ago and encountered Europeans only as late as 1774, when a Spanish expedition in search of an overland route from Sonora to Alta California made its way from Tubac, Sonora through the valley to Monterey, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Temecula
Temecula (; es, Temécula, ; Luiseño: ''Temeekunga'') is a city in southwestern Riverside County, California, United States. The city had a population of 110,003 as of the 2020 census and was incorporated on December 1, 1989. The city is a tourist and resort destination, with the Temecula Valley Wine Country, Old Town Temecula, the Temecula Valley Balloon & Wine Festival, the Temecula Valley International Film Festival, championship golf courses, and resort accommodations contributing to the city's economic profile. The city of Temecula, forming the southwestern anchor of the Inland Empire region, is approximately north of downtown San Diego and southeast of downtown Los Angeles. Although Temecula is geographically closer to downtown San Diego than downtown Los Angeles, it is considered part of the Greater Los Angeles area. Temecula is bordered by the city of Murrieta to the north and the Pechanga Indian Reservation and San Diego County to the south. History Pre-1800 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Anza Basin
Anza, Anzah, or de Anza might refer to: Communities United States * Anza, California, a town in Riverside County, California * Anza, Imperial County, California, a town in Imperial County, California, along California State Route 111 * Camp Anza, a defunct Army installation in Riverside, California Other communities * Anzá Anza () is a town and municipality A municipality is usually a single administrative division having corporate status and powers of self-government or jurisdiction as granted by national and regional laws to which it is subordinate. The t ..., a town in Antioquia department, Colombia * Anza, a neighborhood of Agadir, Morocco * Anzah, a Palestinian village in the West Bank Landforms and parks * Anza (river), a river in Piedmont, Italy * Anza trough, in Kenya * Anza Valley, in Riverside County, California * Anza-Borrego Desert State Park, in Southern California * Lake Anza, a recreational swimming reservoir in the Berkeley Hills, California People ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Aguanga Basin
Aguanga (; Luiseño: ''Awáanga'', meaning "dog place") is a census-designated place located within the Inland Empire, Riverside County, California. It is located about east of Temecula and south-southeast of Hemet. Aguanga lies at an elevation of 1955 feet (596 m). As of the 2010 census, it had a population of 1,028. History The town gets its name from a former village of the Native village called awáanga, meaning 'dog place'. The Butterfield Overland Mail established a station 1.7 miles to the west of the current Post Office in 1858. It was at first called Tejungo Station and was located 14 miles east of Temecula Station and 12 miles northwest of Oak Grove Stage Station. The wooden building was located in a grove of trees a few hundred feet from the stage road.Mildred B. Hoover, Hero E. and Ethel G. Rensch, revised by William N. Abeloe, Historic Spots in California, Third Edition, Stanford University Press, Stanford, 1966, p. 291Lyn Wilkerson, American Trails Revisited: Fo ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Temecula Basin
Temecula Basin is a sedimentary basin, which, along with the Aguanga Basin, is part of the Elsinore Fault Zone, in southwestern Riverside County, California. The Temecula Basin is a basin of down faulted Mesozoic basement rock, overlain by late Cenozoic continental sediments. Aquifer The Temecula Basin is also a local ground water basin and aquifer in southwestern Riverside County. It is the largest groundwater basin in the San Diego water region. from waterboards.ca.gov accessed April 26, 2015 This aquifer is recharged by precipitation in the valley, underflow and by surface flow from the creeks draining the surrounding mountains and the sout ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
San Felipe Fault Zone
The San Felipe Fault Zone (also known as the Agua Caliente or Murrieta Hot Springs fault zone) is an active Quaternary fault zone made up of continuous right-lateral fault strands].Janecke, S. U., Dorsey, R. J., Forand, D., Steely, A. N., Kirby, S. M., Lutz, A. T., ... & Rittenour, T. M. (2011). High geologic slip rates since early Pleistocene initiation of the San Jacinto and San Felipe fault zones in the San Andreas fault system: Southern California, USA. It is a part of the San Andreas fault system and it is located in the western Salton Trough spanning three counties: Imperial, Riverside, and San Diego county, California. It is hypothesized to have originated during the early Pleistocene period. Geography The fault zone strikes WNW and consists of a central Easterly fault with adjacent strands extending out from the San Felipe anticline.Alexander N. Steely, Susanne U. Janecke, Rebecca J. Dorsey, Gary J. Axen; Early Pleistocene initiation of the San Felipe fault zone, SW Salt ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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