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21:11 Sep 4, 2008 |
Spanish to English translations [PRO] Law/Patents - Geology / geological map symbols | |||||||
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| Selected response from: trans4u Local time: 03:03 | ||||||
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4 | contorted layer |
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contorted layer Explanation: Oil from deep underground gradually works its way upward through cracks and fissures in rocks. Oil prospectors get excited if the "reservoir rocks" that contain the oil are covered by a contorted layer of "cap rocks" because this can confine oil in natural reservoirs. An oil well is usually drilled until it breaks through the cap rocks and reaches the oil-saturated reservoir rocks below. The rubble from an impact often forms a porous rock known as breccia that is full of cracks and fissures -- making it excellent for extracting oil through a well. Domes, basins, deep cracks, along with crumpled, folded landforms are other typical features of an impact crater that make them promising for oil prospectors. http://www.space.com/scienceastronomy/planetearth/asteroid_o... -------------------------------------------------- Note added at 25 mins (2008-09-04 21:36:54 GMT) -------------------------------------------------- Pictures here: http://www.union.edu/PUBLIC/GEODEPT/hollocher/skaergaard/geo... |
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