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Makhtesh
A makhtesh ( he, מַכְתֵּשׁ (), Hebrew plural: ( – ''Makhteshim'') is a geological landform considered typical for the Negev desert of Israel and the Sinai peninsula of Egypt. A makhtesh has steep walls of resistant rock surrounding a deep closed valley, which is usually drained by a single wadi. The valleys have limited vegetation and soil, containing a variety of different colored rocks and diverse fauna and flora. The best known and largest makhtesh is Makhtesh Ramon. Etymology Although commonly referred to as "craters", these formations are "erosion cirques" (steephead valleys or box canyons). Craters are formed by the impact of a meteor or volcanic eruption, whereas makhteshim are created by erosion. The word makhtesh is the Hebrew word for a mortar grinder (). The geological landform was given this name because of its similarity to a grinding bowl. Geology Where a hard outer layer of rock covers softer rocks, erosion removes the softer minerals relatively q ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Makhtesh Gadol's Southern "Ribs"
A makhtesh ( he, מַכְתֵּשׁ (), Hebrew plural: ( – ''Makhteshim'') is a geological landform considered typical for the Negev desert of Israel and the Sinai peninsula of Egypt. A makhtesh has steep walls of resistant rock surrounding a deep closed valley, which is usually drained by a single wadi. The valleys have limited vegetation and soil, containing a variety of different colored rocks and diverse fauna and flora. The best known and largest makhtesh is Makhtesh Ramon. Etymology Although commonly referred to as "craters", these formations are "erosion cirques" ( steephead valleys or box canyons). Craters are formed by the impact of a meteor or volcanic eruption, whereas makhteshim are created by erosion. The word makhtesh is the Hebrew word for a mortar grinder (). The geological landform was given this name because of its similarity to a grinding bowl. Geology Where a hard outer layer of rock covers softer rocks, erosion removes the softer minerals relativ ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Makhtesh Ramon
Makhtesh Ramon ( he, מכתש רמון; ''lit.'' Ramon Crater/ Makhtesh ; ar, وادي الرمان, links=no) is a geological feature of Israel's Negev desert. Located some 85 km south of the city of Beersheba, the landform is the world's largest "erosion cirque" (steephead valley or box canyon). The formation is 40 km long, 2–10 km wide and 500 meters deep, and is shaped like an elongated heart. Despite its appearance it is not an impact crater from a meteor nor a volcanic crater formed by a volcanic eruption. The only settlement in the area is the small town of Mitzpe Ramon (מצפה רמון, "Ramon Lookout") located on the northern edge of the depression. Today the area forms Israel's largest national park, the Ramon Nature Reserve. Formation Hundreds of millions of years ago, the Negev desert was covered by an ocean. Slowly, this started to recede northwards leaving behind a hump-shaped hill. The hump was slowly flattened by water and climatic f ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Makhtesh Gadol
HaMakhtesh HaGadol ( he, הַמַּכְתֵּשׁ הַגָּדוֹל, ''lit.'' The Big Crater) is a makhtesh, a geological erosional landform of Israel's Negev desert. It measures 5 x 10 km. A makhtesh has steep walls of resistant rock surrounding a deep closed valley. One of five makhteshim in Israel and seven in the world, HaMakhtesh HaGadol is the second largest, being exceptional in that it is drained by one river, Nahal Hatira. Makatesh Gadol was discovered and named before Makhtesh Ramon which is the largest Makhtesh in Israel. HaMakhtesh HaGadol is near Yeruham, Israel's first development town, established in the early days of the state. The location was chosen because the region was thought to be rich in natural resources. See also *Makhtesh * Makhtesh Ramon *Makhtesh Katan HaMakhtesh HaKatan ( he, הַמַּכְתֵּשׁ הַקָּטָן, ''lit.'' The Small Crater) is a makhtesh, a geological erosional landform of Israel's Negev desert. One of five makhteshi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Makhtesh Katan
HaMakhtesh HaKatan ( he, הַמַּכְתֵּשׁ הַקָּטָן, ''lit.'' The Small Crater) is a makhtesh, a geological erosional landform of Israel's Negev desert. One of five makhteshim in Israel, and seven in the world, it is the third largest in Israel at 5 km by 7 km. It was charted in 1942 by Jewish explorers. See also *Makhtesh Ramon Makhtesh Ramon ( he, מכתש רמון; ''lit.'' Ramon Crater/ Makhtesh ; ar, وادي الرمان, links=no) is a geological feature of Israel's Negev desert. Located some 85 km south of the city of Beersheba, the landform is the world ... Erosion landforms Landforms of Israel Geography of Southern District (Israel) {{regional-geology-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Nature Reserves In Israel
National parks of Israel are declared historic sites or nature reserves, which are mostly operated and maintained by the National Nature and Parks Authority. As of 2015, Israel maintains 81 national parks and more than 400 nature reserves, many of them in the occupied West Bank, that protect 2,500 species of indigenous wild plants, 32 species of fish, 530 species of birds and 100 species of mammals.Where the Golan’s rivers flow into the Sea of Galilee The Times of Israel. Aviva and Shmuel Bar-am. 29/08/15: "As time passed, and with the help of some extraordinary personalities with drive and ambition, the Knesset legislated two official Authorities to deal with our natural heritage: The National Parks Authority and the Nature Reserves Authority. Both began o ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Negev
The Negev or Negeb (; he, הַנֶּגֶב, hanNegév; ar, ٱلنَّقَب, an-Naqab) is a desert and semidesert region of southern Israel. The region's largest city and administrative capital is Beersheba (pop. ), in the north. At its southern end is the Gulf of Aqaba and the resort city and port of Eilat. It contains several development towns, including Dimona, Arad and Mitzpe Ramon, as well as a number of small Bedouin towns, including Rahat and Tel Sheva and Lakiya. There are also several kibbutzim, including Revivim and Sde Boker; the latter became the home of Israel's first Prime Minister, David Ben-Gurion, after his retirement from politics. Although historically part of a separate region (known during the Roman period as Arabia Petraea), the Negev was added to the proposed area of Mandatory Palestine, of which large parts later became Israel, on 10 July 1922, having been conceded by British representative St John Philby "in Trans-Jordan's name". Despite th ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Israel
Israel (; he, יִשְׂרָאֵל, ; ar, إِسْرَائِيل, ), officially the State of Israel ( he, מְדִינַת יִשְׂרָאֵל, label=none, translit=Medīnat Yīsrāʾēl; ), is a country in Western Asia. It is situated on the Eastern Mediterranean, southeastern shore of the Mediterranean Sea and the northern shore of the Red Sea, and Borders of Israel, shares borders with Lebanon to the north, Syria to the northeast, Jordan to the east, and Egypt to the southwest. Israel also is bordered by the Palestinian territories of the West Bank and the Gaza Strip to the east and west, respectively. Tel Aviv is the Economy of Israel, economic and Science and technology in Israel, technological center of the country, while its seat of government is in its proclaimed capital of Jerusalem, although Status of Jerusalem, Israeli sovereignty over East Jerusalem is unrecognized internationally. The land held by present-day Israel witnessed some of the earliest human occup ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Erosion Landforms
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 pro ... [...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 ero ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Dolomite (rock)
Dolomite (also known as dolomite rock, dolostone or dolomitic rock) is a sedimentary carbonate rock that contains a high percentage of the mineral dolomite, CaMg(CO3)2. It occurs widely, often in association with limestone and evaporites, though it is less abundant than limestone and rare in Cenozoic rock beds (beds less than about 66 million years in age). The first geologist to distinguish dolomite rock from limestone was Belsazar Hacquet in 1778. Most dolomite was formed as a magnesium replacement of limestone or of lime mud before lithification. The geological process of conversion of calcite to dolomite is known as dolomitization and any intermediate product is known as dolomitic limestone. The "dolomite problem" refers to the vast worldwide depositions of dolomite in the past geologic record in contrast to the limited amounts of dolomite formed in modern times. Recent research has revealed sulfate-reducing bacteria living in anoxic conditions precipitate dolomite which ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Landforms Of Israel
A landform is a natural or anthropogenic land feature on the solid surface of the Earth or other planetary body. Landforms together make up a given terrain, and their arrangement in the landscape is known as topography. Landforms include hills, mountains, canyons, and valleys, as well as shoreline features such as bays, peninsulas, and seas, including submerged features such as mid-ocean ridges, volcanoes, and the great ocean basins. Physical characteristics Landforms are categorized by characteristic physical attributes such as elevation, slope, orientation, stratification, rock exposure and soil type. Gross physical features or landforms include intuitive elements such as berms, mounds, hills, ridges, cliffs, valleys, rivers, peninsulas, volcanoes, and numerous other structural and size-scaled (e.g. ponds vs. lakes, hills vs. mountains) elements including various kinds of inland and oceanic waterbodies and sub-surface features. Mountains, hills, plateaux, and plains are the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Acacia (Vachellia)
''Vachellia'' is a genus of flowering plants in the legume family, Fabaceae, commonly known as thorn trees or acacias. It belongs to the subfamily Mimosoideae. Its species were considered members of genus '' Acacia'' until 2009. ''Vachellia'' can be distinguished from other acacias by its capitate inflorescences and spinescent stipules. Before discovery of the New World, Europeans in the Mediterranean region were familiar with several species of ''Vachellia'', which they knew as sources of medicine, and had names for them that they inherited from the Greeks and Romans. The wide-ranging genus occurs in a variety of open, tropical to subtropical habitats, and is locally dominant. In parts of Africa, ''Vachellia'' species are shaped progressively by grazing animals of increasing size and height, such as gazelle, gerenuk, and giraffe. The genus in Africa has thus developed thorns in defence against such herbivory. Nomenclature By 2005, taxonomists had decided that ''Acacia sensu l ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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