aplite

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aplite

[′a‚plīt]
(petrology)
Fine-grained granitic dike rock made up of light-colored mineral constituents, mostly quartz and feldspar; used to manufacture glass and enamel.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
References in periodicals archive ?
The biotite granites of the Ereda stock and the aplitic granite veins from the Neeme stock are more differentiated (Petersell & Kirs 1992).
1 and 2) is composed of fine-grained equigranular granite (GRI), aplitic to porphyritic granite (GRII), and fine- to medium-grained equigranular granite (GRIII), although locally porphyritic and pegmatitc varieties of GRIII are also present (Rooiman et al.
Unit GRII is mainly composed of porphyritic monzogranite, with local aplitic and seriate textural varieties.
However, a few topaz crystals that occur as inclusions in euhedral quartz in GRIII and the presence of primary topaz in an aplitic contact phase of GRII, led Sinclair and Kooiman (1990) to conclude that the MPG can be classified as topaz granite (Manning 1988; Manning and Hill 1990).
Abundant aplitic and pegmatitic rocks are associated with the quartz monzonite.