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El Tepeyac National Park
El Tepeyac National Park is one of a number of federally recognized national parks in Mexico that are protected natural areas and administered by the federal National Commission of Protected Natural Areas (CONANP), a subsidiary of SEMARNAT (Ministry of Environment). It is one of the few green areas located north of the Mexico City suburbs. 95% of its territory is located in Gustavo A. Madero, D.F. Borough and 5% in the municipality of Tlalnepantla de Baz. This is one of the large expanses of artificial forest of eucalyptus and was reforested in the first half of the 20th century in the Federal District. The designated territory for the National Park is the Tepeyac Hill, place known for the legend of the apparition of the Virgin of Guadalupe to the indigenous Juan Diego. From the top of the hill a whole view of the Valley of Mexico can be seen. However, this place is threatened by the urban sprawl growing in the surroundings. This park covers part of the Sierra de Guadalupe mountai ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Subvolcanic Rock
A subvolcanic rock, also known as a hypabyssal rock, is an intrusive igneous rock that is emplaced at depths less than within the crust, and has intermediate grain size and often porphyritic texture between that of volcanic rocks and plutonic rocks. Subvolcanic rocks include diabase (also known as dolerite) and porphyry. Common examples of subvolcanic rocks are diabase, quartz dolerite, microgranite, and diorite. See also * Cone sheet * Dike (geology) * Igneous intrusion * Sill (geology) In geology, a sill is a tabular sheet intrusion that has intruded between older layers of sedimentary rock, beds of volcanic lava or tuff, or along the direction of foliation in metamorphic rock. A ''sill'' is a ''concordant intrusive sheet'', ... References Igneous petrology Volcanology {{Volcanology-stub he:סלע געשי#סלעים תת-געשיים ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Parks In Mexico City
A park is an area of natural, semi-natural or planted space set aside for human enjoyment and recreation or for the protection of wildlife or natural habitats. Urban parks are green spaces set aside for recreation inside towns and cities. National parks and country parks are green spaces used for recreation in the countryside. State parks and provincial parks are administered by sub-national government states and agencies. Parks may consist of grassy areas, rocks, soil and trees, but may also contain buildings and other artifacts such as monuments, fountains or playground structures. Many parks have fields for playing sports such as baseball and football, and paved areas for games such as basketball. Many parks have trails for walking, biking and other activities. Some parks are built adjacent to bodies of water or watercourses and may comprise a beach or boat dock area. Urban parks often have benches for sitting and may contain picnic tables and barbecue grills. The largest ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
National Parks Of Mexico
Mexico recognizes 67 federally protected natural areas as national parks ( es, Parques Nacionales), which are administered by the National Commission of Protected Natural Areas (CONANP), a branch of the federal Secretariat of the Environment and Natural Resources The Secretariat of Environment and Natural Resources (in Spanish: ''Secretaría del Medio Ambiente y Recursos Naturales, SEMARNAT'') is Mexico's environment ministry. Its head, the Secretary of the Environment and Natural Resources, is a member .... Together, they cover a combined area of in 23 of the 31 administrative divisions of Mexico, Mexican states and the independent district of Mexico City, representing 0.73% of the territory of Mexico. , retrieved 6 February 2012 List of national parks ...[...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
List Of National Parks Of Mexico
Mexico recognizes 67 federally protected natural areas as national parks ( es, Parques Nacionales), which are administered by the National Commission of Protected Natural Areas (CONANP), a branch of the federal Secretariat of the Environment and Natural Resources. Together, they cover a combined area of in 23 of the 31 Mexican states and the independent district of Mexico City, representing 0.73% of the territory of Mexico. , retrieved 6 February 2012 List of national parks See also *References Sources ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Lithosol
Orthents are soils defined in USDA soil taxonomy as entisols that lack due to either steep slopes or parent materials that contain no permanent weatherable minerals (such as ironstone). Typically, Orthents are exceedingly shallow soils. They are often referred to as ''skeletal soils'' or, in the United Nations FAO soil classification, as ''lithosols''. The basic requirement for recognition of an orthent is that any former soil has been either completely removed or so truncated that characteristics typical of all orders other than entisols are absent. Characteristics Most orthents are found in very steep, mountainous regions where erodible material is so rapidly removed by erosion that a permanent covering of deep soil cannot establish itself. Such conditions occur in almost all regions of the world where steep slopes are prevalent. In Australia and a few regions of Africa, orthents occur in flat terrain because the parent rock contains ''absolutely no weatherable minerals ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Basaltic Andesite
Basaltic andesite is a volcanic rock that is intermediate in composition between basalt and andesite. It is composed predominantly of augite and plagioclase. Basaltic andesite can be found in volcanoes around the world, including in Central America and the Andes of South America. Description Basaltic andesite is a fine-grained (aphanitic) igneous rock that is moderately low in silica and low in alkali metal oxides. It is not separately defined in the QAPF classification, which is based on the relative percentages of quartz, alkali feldspar, plagioclase feldspar, and feldspathoids, but would fall in the basalt-andesite field. This corresponds to rock in which feldspathoid makes up less than 10% and quartz less than 20% of the total QAPF fraction, and in which at least 65% of the feldspar is plagioclase. Basaltic andesite would be further distinguished from basalt and andesite by a silica content between 52% and 57%. Although classification by mineral content is preferred by the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Tuffs
Tuff is a type of rock made of volcanic ash ejected from a vent during a volcanic eruption. Following ejection and deposition, the ash is lithified into a solid rock. Rock that contains greater than 75% ash is considered tuff, while rock containing 25% to 75% ash is described as tuffaceous (for example, ''tuffaceous sandstone''). Tuff composed of sandy volcanic material can be referred to as volcanic sandstone. Tuff is a relatively soft rock, so it has been used for construction since ancient times. Because it is common in Italy, the Romans used it often for construction. The Rapa Nui people used it to make most of the ''moai'' statues on Easter Island. Tuff can be classified as either igneous or sedimentary rock. It is usually studied in the context of igneous petrology, although it is sometimes described using sedimentological terms. Tuff is often erroneously called tufa in guidebooks and in television programmes. Volcanic ash The material that is expelled in a volcanic e ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Reforestation
Reforestation (occasionally, reafforestation) is the natural or intentional restocking of existing forests and woodlands (forestation) that have been depleted, usually through deforestation, but also after clearcutting. Management A debated issue in managed reforestation is whether or not the succeeding forest will have the same biodiversity as the original forest. If the forest is replaced with only one species of tree and all other vegetation is prevented from growing back, a monoculture forest similar to agricultural crops would be the result. However, most reforestation involves the planting of different selections of seedlings taken from the area, often of multiple species. Another important factor is the natural regeneration of a wide variety of plant and animal species that can occur on a clear cut. In some areas the suppression of forest fires for hundreds of years has resulted in large single aged and single species forest stands. The logging of small clear cuts an ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mexico
Mexico (Spanish: México), officially the United Mexican States, is a country in the southern portion of North America. It is bordered to the north by the United States; to the south and west by the Pacific Ocean; to the southeast by Guatemala, Belize, and the Caribbean Sea; and to the east by the Gulf of Mexico. Mexico covers ,Mexico ''''. . making it the world's 13th-largest country by are ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sierra De Guadalupe, Mexico
The Sierra de Guadalupe is a mountain range in Mexico. It is found between the borough of Gustavo A. Madero in northern Mexico City and the municipalities of Cuautitlán Izcalli, Tultitlán, Coacalco, Ecatepec and Tlalnepantla, in the State of Mexico. Its highest peak is at . History There is evidence that the Aztecs worshipped Tonantzin (Goddess of Sustenance) at Tepeyac hill. The sierra is named after Our Lady of Guadalupe, a Marian apparition that, according to oral and written colonial sources such as the ''Huei tlamahuiçoltica'', Juan Diego saw at the Tepeyac hill. In 1937, the El Tepeyac National Park was created in the Tepeyac hill, in the eastern portion of the sierra, by decree of the president Lázaro Cárdenas. Geology The sierra is a dormant volcano that is part of the Trans-Mexican Volcanic Belt. The basement is made of andesitic and dacitic soil. The last volcanic activity in the area occurred 14 to 15 million years ago. Ecology Climate The sierra ha ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
