Transcription of CLAY MINERALS - USDA
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clay MINERALSCD. BartonUnited States Department of Agriculture Forest Service, Aiken,South Carolina, KarathanasisUniversity of Kentucky, Lexington, Kentucky, MINERALS refers to a group of hydrous aluminosili-cates that predominate the clay -sized (<2 |xm) fraction ofsoils. These MINERALS are similar in chemical and structuralcomposition to the primary MINERALS that originate fromthe Earth's crust; however, transformations in thegeometric arrangement of atoms and ions within theirstructures occur due to weathering. Primary MINERALS format elevated temperatures and pressures, and are usuallyderived from igneous or metamorphic rocks. Inside theEarth these MINERALS are relatively stable, but transform-ations may occur once exposed to the ambient conditionsof the Earth's surface.
CLAY MINERALS CD. Barton United States Department of Agriculture Forest Service, Aiken, South Carolina, U.S.A. A.D. Karathanasis University of Kentucky, Lexington, Kentucky, U.S.A. INTRODUCTION Clay minerals refers to a group of hydrous aluminosili-cates that predominate the clay-sized (<2 |xm) fraction of soils.
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