Search results
Results from the WOW.Com Content Network
A piece of flint 9–10 cm (3.5–3.9 in) long, weighing 171 grams. Flint, occasionally flintstone, is a sedimentary cryptocrystalline form of the mineral quartz, [1] [2] categorized as the variety of chert that occurs in chalk or marly limestone. Historically, flint was widely used to make stone tools and start fires.
Flint mining is the process of extracting flint from underground. Flint mines can be as simple as a pit on the surface or an area of quarrying , or it may refer to a series of shafts and tunnels used to extract flint .
Cryptocrystalline is a rock texture made up of such minute crystals that its crystalline nature is only vaguely revealed even microscopically [1] in thin section by transmitted polarized light. Among the sedimentary rocks, chert and flint are cryptocrystalline. Carbonado, a form of diamond, is also cryptocrystalline.
Main page; Contents; Current events; Random article; About Wikipedia; Contact us
Main page; Contents; Current events; Random article; About Wikipedia; Contact us; Pages for logged out editors learn more
Alibates Flint Quarries National Monument, Fritch, Texas, NRHP-listed; Uvalde Flint Quarry, Uvalde, Texas, NRHP-listed; Champion Stone Company, Lueder's Limestone quarry mining from the Lueders Basin outside Abilene, Texas with more than 100 years of Limestone reserves, 14 harvestable layers of limestone and over 12 color options.
Get AOL Mail for FREE! Manage your email like never before with travel, photo & document views. Personalize your inbox with themes & tabs. You've Got Mail!
Hälleflinta (a Swedish word meaning rock-flint) is a white, grey, yellow, greenish or pink fine-grained rock consisting of an intimate mixture of quartz and feldspar. [1] Many examples are banded or striated; others contain porphyritic crystals of quartz which resemble those of the felsites and porphyries.