noun
rock texture; rock structure
Geological term referring to the physical appearance and arrangement of grains or crystals in a rock. Often used in academic or technical contexts.
See also: 石目
この花崗岩の石理は非常に細かい。
The texture of this granite is very fine.
石理の違いから、岩石の形成過程を推測できる。
From differences in rock texture, one can infer the formation process of the rock.