micrographer (mikrografer)

[ By some it is regarded as the equivalent of crystallite, which is properly an aggregation of microscopic globular forms (globulites). By others crystallites are considered as differing from microliths in that the latter have the internal structure of true crystals, while in the former this cannot be recognized. Elongated or lath-shaped forms and such as resemble an hour-gla in shape are those now most generally designated as microliths; if curved or more or le twisted or hair-like, they are frequently called trichites. Microliths are most frequently seen in rocks of igneous origin, and are especially abundant as products of the devitrification of the gla y lavas. The feldspars, hornblende, augite, and apatite are minerals most commonly found a uming this form.