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Huayllay National Sanctuary
Huayllay National Sanctuary is a park in Peru located in the Meseta of Bombón in the Huayllay District of Pasco Region. The sanctuary is noted for the large scenic rock formations of the rock forest of Huayllay (Spanish: ''Bosque de Rocas'') and its native plants and animals. Geology The rock formations date to the beginning of the Cenozoic age. They were initially formed when volcanic activity deposited layers of hardened volcanic ash, or ignimbrite on the landscape, forming a plateau atop layers of sandstone, limestone, and conglomerate. Ignimbrite is a porous rock, so it is particularly vulnerable to erosion. Approximately 20,000 years ago, during the most recent ice age, the cycle of freezing, thawing, and re-freezing of snow on the plateau caused meltwater to filter into the cracks in the rock and enlarge them. Eventually, this resulted in large portions of the rock crumbling away, leaving the deeply eroded formations that now comprise the ''Bosque de Rocas''. The forma ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pasco Region
Pasco () is a department and region in central Peru. Its capital is Cerro de Pasco. Political division The region is divided into 3 provinces ( es, provincias, singular: ), which are composed of 28 districts (''distritos'', singular: ''distrito''). Provinces The provinces, with their capitals in parentheses, are: * Daniel Alcídes Carrión (Yanahuanca) * Oxapampa (Oxapampa) * Pasco (Cerro de Pasco) Places of interest * Cerro de la Sal * El Sira Communal Reserve * Gran Pajonal * San Matías–San Carlos Protection Forest * Yanachaga–Chemillén National Park * Yanesha Communal Reserve The Communal Reservation Yanesha or Yanesha Community Reserve is a communal reserve in the Palcazu District of Oxapampa Province of Peru. It covers an area of in the Palcazu River basin. The reserve was creating by law on April 28, 1988, to prot ... External links Gobierno Regional Pasco – Pasco Regional Government official website Regions of Peru {{Pasco-geo-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Porosity
Porosity or void fraction is a measure of the void (i.e. "empty") spaces in a material, and is a fraction of the volume of voids over the total volume, between 0 and 1, or as a percentage between 0% and 100%. Strictly speaking, some tests measure the "accessible void", the total amount of void space accessible from the surface (cf. closed-cell foam). There are many ways to test porosity in a substance or part, such as industrial CT scanning. The term porosity is used in multiple fields including pharmaceutics, ceramics, metallurgy, materials, manufacturing, petrophysics, hydrology, earth sciences, soil mechanics, and engineering. Void fraction in two-phase flow In gas-liquid two-phase flow, the void fraction is defined as the fraction of the flow-channel volume that is occupied by the gas phase or, alternatively, as the fraction of the cross-sectional area of the channel that is occupied by the gas phase. Void fraction usually varies from location to location in the flow ch ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
National Sanctuaries Of Peru
National may refer to: Common uses * Nation or country ** Nationality – a ''national'' is a person who is subject to a nation, regardless of whether the person has full rights as a citizen Places in the United States * National, Maryland, census-designated place * National, Nevada, ghost town * National, Utah, ghost town * National, West Virginia, unincorporated community Commerce * National (brand), a brand name of electronic goods from Panasonic * National Benzole (or simply known as National), former petrol station chain in the UK, merged with BP * National Car Rental, an American rental car company * National Energy Systems, a former name of Eco Marine Power * National Entertainment Commission, a former name of the Media Rating Council * National Motor Vehicle Company, Indianapolis, Indiana, USA 1900-1924 * National Supermarkets, a defunct American grocery store chain * National String Instrument Corporation, a guitar company formed to manufacture the first resonator ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Rock Climbing
Rock climbing is a sport in which participants climb up, across, or down natural rock formations. The goal is to reach the summit of a formation or the endpoint of a usually pre-defined route without falling. Rock climbing is a physically and mentally demanding sport, one that often tests a climber's strength, endurance, agility and balance along with mental control. Knowledge of proper climbing techniques and the use of specialized climbing equipment is crucial for the safe completion of routes. Because of the wide range and variety of rock formations around the world, rock climbing has been separated into several different styles and sub-disciplines, such as scrambling, bouldering, sport climbing, and trad (traditional) climbing another activity involving the scaling of hills and similar formations, differentiated by the rock climber's sustained use of hands to support their body weight as well as to provide balance. Rock climbing competitions have the objectives of either ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Garden Of The Gods
Garden of the Gods (Arapaho: ''Ho3o’uu Niitko’usi’i'') is a public park located in Colorado Springs, Colorado, United States. It was designated a National Natural Landmark in 1971. Name The area now known as Garden of the Gods was first called Red Rock Corral by the Europeans. Then, in August 1859, two surveyors who helped to set up Colorado City explored the site. One of the surveyors, Melancthon S. Beach suggested it would be a "capital place for a beer garden". His companion, the young Rufus Cable, awestruck by the impressive rock formations, exclaimed, "Beer Garden! Why, it is a fit place for the Gods to assemble. We will call it the Garden of the Gods.", The April 5, 1893 issue of the Colorado Transcript reported, "It was Helen Hunt Jackson, it is said, who named 'the Garden of the Gods' in Colorado. Riding past the cabin of a prospector from the South in one of the early days of the settlement, she was attracted by a beautifully kept garden in which two negro s ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Shilin (Stone Forest)
The Stone Forest or Shilin () is a notable set of limestone formations about 500 km2 located in Shilin Yi Autonomous County, Yunnan Province, People's Republic of China, near Shilin approximately from the provincial capital Kunming. The tall rocks seem to arise from the ground in a manner somewhat reminiscent of stalagmites, or with many looking like petrified trees, thereby creating the illusion of a forest made of stone. Since 2007, two parts of the site, the Naigu Stone Forest () and Suogeyi Village (), have been UNESCO World Heritage Sites as part of the South China Karst. The site is classified as a AAAAA-class tourist site. Features Shilin National Scenic Area () covers an area of and is divided into seven scenic areas as follows: * Greater & Lesser Stone Forests () - also known as the Lizijing Stone Forest () * Naigu Stone Forest () * Zhiyun Cave () * Lake Chang (长湖 literally ''Long Lake'') * Lake Yue (月湖 literally ''Moon Lake'') * Dadieshui Waterfall ( ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Thawing
Melting, or fusion, is a physical process that results in the phase transition of a substance from a solid to a liquid. This occurs when the internal energy of the solid increases, typically by the application of heat or pressure, which increases the substance's temperature to the melting point. At the melting point, the ordering of ions or molecules in the solid breaks down to a less ordered state, and the solid "melts" to become a liquid. Substances in the molten state generally have reduced viscosity as the temperature increases. An exception to this principle is the element sulfur, whose viscosity increases in the range of 160 °C to 180 °C due to polymerization. Some organic compounds melt through mesophases, states of partial order between solid and liquid. First order phase transition From a thermodynamics point of view, at the melting point the change in Gibbs free energy ''∆G'' of the substances is zero, but there are non-zero changes in the enthalpy ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Erosion
Erosion is the action of surface processes (such as water flow or wind) that removes soil, rock, or dissolved material from one location on the Earth's crust, and then transports it to another location where it is deposited. Erosion is distinct from weathering which involves no movement. Removal of rock or soil as clastic sediment is referred to as ''physical'' or ''mechanical'' erosion; this contrasts with ''chemical'' erosion, where soil or rock material is removed from an area by dissolution. Eroded sediment or solutes may be transported just a few millimetres, or for thousands of kilometres. Agents of erosion include rainfall; bedrock wear in rivers; coastal erosion by the sea and waves; glacial plucking, abrasion, and scour; areal flooding; wind abrasion; groundwater processes; and mass movement processes in steep landscapes like landslides and debris flows. The rates at which such processes act control how fast a surface is eroded. Typically, physical erosion procee ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Conglomerate (geology)
Conglomerate () is a clastic sedimentary rock that is composed of a substantial fraction of rounded to subangular gravel-size clasts. A conglomerate typically contains a matrix of finer-grained sediments, such as sand, silt, or clay, which fills the interstices between the clasts. The clasts and matrix are typically cemented by calcium carbonate, iron oxide, silica, or hardened clay. Conglomerates form by the consolidation and lithification of gravel. They can be found in sedimentary rock sequences of all ages but probably make up less than 1 percent by weight of all sedimentary rocks. In terms of origin and depositional mechanisms, they are closely related to sandstones and exhibit many of the same types of sedimentary structures, e.g., tabular and trough cross-bedding and graded bedding.Boggs, S. (2006) ''Principles of Sedimentology and Stratigraphy.'', 2nd ed. Prentice Hall, New York. 662 pp. Friedman, G.M. (2003) ''Classification of sediments and sedimentary rocks.'' In G ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Limestone
Limestone ( calcium carbonate ) is a type of carbonate sedimentary rock which is the main source of the material lime. It is composed mostly of the minerals calcite and aragonite, which are different crystal forms of . Limestone forms when these minerals precipitate out of water containing dissolved calcium. This can take place through both biological and nonbiological processes, though biological processes, such as the accumulation of corals and shells in the sea, have likely been more important for the last 540 million years. Limestone often contains fossils which provide scientists with information on ancient environments and on the evolution of life. About 20% to 25% of sedimentary rock is carbonate rock, and most of this is limestone. The remaining carbonate rock is mostly dolomite, a closely related rock, which contains a high percentage of the mineral dolomite, . ''Magnesian limestone'' is an obsolete and poorly-defined term used variously for dolomite, for limes ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sandstone
Sandstone is a clastic sedimentary rock composed mainly of sand-sized (0.0625 to 2 mm) silicate grains. Sandstones comprise about 20–25% of all sedimentary rocks. Most sandstone is composed of quartz or feldspar (both silicates) because they are the most resistant minerals to weathering processes at the Earth's surface. Like uncemented sand, sandstone may be any color due to impurities within the minerals, but the most common colors are tan, brown, yellow, red, grey, pink, white, and black. Since sandstone beds often form highly visible cliffs and other topographic features, certain colors of sandstone have been strongly identified with certain regions. Rock formations that are primarily composed of sandstone usually allow the percolation of water and other fluids and are porous enough to store large quantities, making them valuable aquifers and petroleum reservoirs. Quartz-bearing sandstone can be changed into quartzite through metamorphism, usually related to ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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