1. A basin scooped out of soft, unconsolidated deposits by process of deflation. Ranges from a few meters to several kilometers in diameter.
    Source: Leet, L. Don. 1982. Physical Geology, 6th Edition. Englewood Cliffs, NJ: Prentice-Hall
     
  2. a. A large mineralized outcrop beneath which the vein is smaller, e.g., a great mass of quartz that conceals a vein only a few feet wide.
    b. A shot or blast that goes off like a gun and does not shatter the rock; a windy shot.
    c. A large outcrop beneath which the vein is smaller is called a blowout. (slang) Fay
    d. The high-pressure, sometimes violent, and uncontrolled ejection of water, gas, or oil from a borehole. Long
    e. Used by prospectors and miners for any surface exposure of strongly altered discolored rock associated, or thought to be associated, with a mineral deposit. AGI
    f. Used by miners and prospectors for a large, more or less isolated, usually barren quartz outcrop. Known in Australia as blow. Hess
    g. To put a blast furnace out of blast, by ceasing to charge fresh materials, and continuing the blast until the contents of the furnace have been smelted. Fay
    h. To smelt the iron-bearing materials in the furnace, adding domestic coke so that the stockline is about normal. Camp
    i. A general term for a small saucer-, cup-, or trough-shaped hollow or depression formed by wind erosion on a preexisting dune or other sand deposit, esp. in an area of shifing sand or loose soil, or where protective vegetation is disturbed or destroyed; the adjoining accumulation of sand derived from the depression, where recognizable, is commonly included. Some blowouts may be many kilometers in diameter. AGI
    Source:
    Dictionary of Mining, Mineral, and Related Terms











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