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chert |
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chert: see flint flint, variety of quartz that commonly occurs in rounded nodules and whose crystal structure is not visible to the naked eye. Flint is dark gray, smoky brown, or black in color; pale gray flint is called chert. ..... Click the link for more information. . chert [chərt] (petrology) A hard, dense, sedimentary rock composed of fine-grained silica, characterized by a semivitreous to dull luster and a splintery to conchoidal fracture; commonly gray, black, reddish brown, or green. Also known as hornstone; phthanite. How to thank TFD for its existence? Tell a friend about us, add a link to this page, add the site to iGoogle, or visit webmaster's page for free fun content. |
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For their study of the Permian, the Canadian team collected a section of well-preserved shales and cherts from northeastern British Columbia. Of particular interest, drilling in holes F-05-03 and two holes currently in progress in Q2-2006 (F-05-4, F-05-05) on Metco properties 1-2 km northeast of the Horne-Quemont Mines, have intersected Horne Rhyolite, cherts and exhalite-sulphide-bearing rocks typical of the Horne Mine stratigraphy. 20 m thick exhalite zone consisting of cherts, silica sinter and a 1. |
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