Abstract

An experimental study was conducted on a suite of igneous, metamorphic, and sedimentary rocks which had been artificially fragmented to five size fractions: granule, very coarse sand, coarse sand, medium sand, and fine sand. These fractions were studied to determine changes in textural properties with progressive size reduction and the feasibility of identifying parent rock textures in fragments ranging from granule to fine sand size. The diagnostic textures of all the rocks studied are preserved to essentially the same degree in granule-sized fragments as in thin sections of parent rocks. Identification is less reliable in smaller sizes and depends upon the mean grain size and sorting of the parent rock.

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