Abstract

Minerals in exposed thin-sections, diamond-sawed slabs, and detrital minerals partially embedded in mounting media can be preferentially stained with various dyes, and cellulose peels can be obtained from these materials to show both fabric and discrete mineral species. These have the advantage of providing inexpensive "copies" which can be utilized in projection, microscopic examination, and in some instances in preparation of photographic illustrations. They can be readily filed for ready reference in a small storage space, are practically indestructible in routine work, and last indefinitely.

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