a. Said of an igneous rock, and of its texture, in which the individual
crystals have an average diameter in the range of 0.04 to 0.2 in (1 to 5
mm). AGI b. Said of a sediment or sedimentary rock, and of its texture, in which
the individual particles have an average diameter in the range of 1/16 to
2 mm (62 to 2,000 mu m, or sand size). CF:
coarse-grained;
fine-grained.
AGI
Source:
Dictionary of Mining, Mineral, and Related Terms
