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a. A coarse-grained sandstone, esp. one composed of angular particles;
e.g., a breccia composed of particles ranging in diameter from 2 to 4 mm.
AGI
b. A sand or sandstone made up of angular grains that may be coarse or
fine. The term has been applied to any sedimentary rock that looks or
feels gritty on account of the angularity of the grains. AGI
c. A sandstone composed of particles of conspicuously unequal sizes
(including small pebbles or gravel). AGI
d. A sandstone with a calcareous cement. The term has been applied
incorrectly to any nonquartzose rock resembling a grit; e.g., pea grit or
a calcareous grit. AGI
e. A small particle of a stone or rock; esp. a hard, angular granule of
sand. Also, an abrasive composed of such granules. AGI
f. The structure or grain of a stone that adapts it for grinding or
sharpening; the hold of a grinding substance. Also, the size of abrasive
particles, usually expressed as their mesh number. AGI
g. An obsolete term for sand or gravel, and for earth or soil. The term is
vague and has been applied widely with many different connotations.
Etymol: Old English greot, gravel, sand. AGI
Source:
Dictionary of Mining, Mineral, and Related Terms
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