silicification


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Related to silicification: petrifying

silicification

[sə‚lis·ə·fə′kā·shən]
(geology)
Introduction of or replacement by silica. Also known as silification.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
References in periodicals archive ?
Both the Shepherds Bush and the Spotted Dog Prospects are topographically dominated by a ridge of outcropping chert and ironstone, with zones of brecciation, silicification and quartz veining along the strike of this unit.
Generally, K and other metal constituents are added to the mass rock by hydrothermal solutions, and it is easily observed in mafic/ultramafic units or along lithologic contacts where hydrothermal alteration such as silicification is intensive.
But, the high level of lignification and silicification, the slow and limited ruminal degradation of the carbohydrates and the low content of nitrogen are the main deficiencies of rice straw, affecting its value as feed for ruminants (5).
The host rocks are characterized by silicification and biotite alterations which are associated with sulphides such as chalcopyrite and pyrite.
The company collected 272 soil/ talus and 325 rock samples over exposed bodies of silicification at Orange Mountain, silicified and mineralized structures located between Orange Mountain and Shuma gin, and exposures of multi-phase breccias and additional structures at Shumagin.
Silicification of fossils from selected Paleozoic formations in West Tennessee.