Definitions

  • Argillite a compact argillaceous rock differing from shale in being cemented by silica and from slate in having no slaty cleavage.
  • Calcine to heat to a high temperature (as inorganic materials) but without fusing in order to drive off volatile matter or to effect changes.
  • Calcite a mineral CaCO3 consisting of calcium carbonate crystallized in hexagonal form and including common limestone, chalk, and marble.
  • Cambrian of, relating to, or being the earliest geologic period of the Paleozoic era or the corresponding system of rocks marked by fossils of every great animal type except the vertebrate and by scarcely recognizable plant fossils.
  • Plastic made up of fragments of preexisting rocks.
  • Diabase an altered basalt (a dark gray to black, dense to fine-grained igneous rock - different from argillite slate).
  • Fissile capable of being split or divided in the direction of the grain or along natural planes of cleavage.
  • Shale a fissile rock that is formed by the consolidation of clay, mud or silt, has a finely stratified or laminated structure, and is composed of minerals essentially unaltered since deposition.
  • Tectonic of or relating to the deformation of the crust of a planet, the forces involved in or producing such deformation, and the resulting forms.
  • Tuff a rock composed of the finer kinds of volcanic detritus usually fused together by heat.
     

 

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