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rock abrasion

См. также в других словарях:

  • Rock Abrasion Tool — The Rock Abrasion Tool (RAT) is a grinding and brushing installation on NASA’s twin Mars Exploration Rovers, Spirit (MER A) and Opportunity (MER B), which landed on Mars in January 2004. It was designed, developed and continues to be operated by… …   Wikipedia

  • Abrasion (geology) — Abrasion is mechanical scraping of a rock surface by friction between rocks and moving particles during their transport in wind, glacier, waves, gravity or running water, after friction, the moving particles dislodge loose and weak debris from… …   Wikipedia

  • Abrasion — may refer to: *Abrasion (medical), a wound consisting of superficial damage to the skin *Abrasion (dental), the loss of tooth structure by mechanical forces from a foreign element *Abrasion (geology), mechanical scraping of a rock surface by… …   Wikipedia

  • abrasion — [ə brā′zhən] n. [LL abrasio < L abradere, ABRADE] 1. a scraping or rubbing off, as of skin 2. a wearing away by rubbing or scraping, as of rock by wind, water, etc. 3. an abraded spot or area …   English World dictionary

  • Rock-cut basin — A rock cut basin, in this usage of the term, is a natural phenomenon. They are cylindrical depressions cut into stream or river beds, often filled with water. Such plucked bedrock pits are created by kolks; powerful vortices within the water… …   Wikipedia

  • rock shelter —    1. Shallow cave under an overhanging rock ledge. Many sea caves are rock shelters. Also found in limestone and other rock types where streams have undercut their banks at bends, or where there has been abrasion by blowing sand. Common in… …   Lexicon of Cave and Karst Terminology

  • abrasion — n. 1 the scraping or wearing away (of skin, rock, etc.). 2 a damaged area resulting from this. Etymology: L abrasio (as ABRADE) …   Useful english dictionary

  • Heat Shield Rock — MarsGeo name=Heat Shield Rock caption=Heat shield, with Heat Shield Rock just above and to the left in the background (click to enlarge) type=Rock latitude=1.9 N or S=S longitude=354.5 E or W=EHeat Shield Rock is a basketball sized iron nickel… …   Wikipedia

  • Bounce Rock — MarsGeo name=Bounce Rock caption=False color composite of Bounce Rock after being drilled by the rock abrasion tool of the Mars Exploration Rover Opportunity type=Rock latitude=1.9 N or S=S longitude=354.5 E or W=EBounce Rock is a football sized… …   Wikipedia

  • sedimentary rock — Rock formed at or near the Earth s surface by the accumulation and lithification of fragments of preexisting rocks or by precipitation from solution at normal surface temperatures. Sedimentary rocks can be formed only where sediments are… …   Universalium

  • Core sample — Rock core samples. The product of a Diamond rig. (The bird is a Pied Butcherbird.) A core sample is a cylindrical section of (usually) a naturally occurring substance. Most core samples are obtained by drilling with special drills into the… …   Wikipedia

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