- Industry: Mining
- Number of terms: 33118
- Number of blossaries: 0
- Company Profile:
The U.S. Bureau of Mines (USBM) was the primary United States Government agency conducting scientific research and disseminating information on the extraction, processing, use, and conservation of mineral resources.
Founded on May 16, 1910, through the Organic Act (Public Law 179), USBM's missions ...
An igneous rock structure of tabular sheets suggesting stratification. It is formed by contraction during cooling; the structure is parallel to the surface of cooling and is commonly accentuated by weathering.
Industry:Mining
An igneous rock structure of tabular sheets suggesting stratification. It is formed by contraction during cooling; the structure is parallel to the surface of cooling and is commonly accentuated by weathering.
Industry:Mining
An igneous rock that has risen from the depths as magma but solidified mainly as such minor intrusions as dikes and sills.
Industry:Mining
An igneous rock with sheath and core structure giving the appearance of letters on its surface.
Industry:Mining
An igneous rock with the same chemical composition as its parent magma, i.e., undifferentiated. Compare: diaschistic
Industry:Mining
An igneous-rock layer, differing mineralogically or structurally from the adjacent layers, which was produced by flowage before the complete solidification of the magma. Compare: flow line; schlieren.
Industry:Mining
An igniting or explosive device in the form of a cord, consisting of a flexible fabric tube and a core of low explosive (safety fuse) or high explosive (detonating cord).
Industry:Mining
An illuminator used to observe inclusions and other imperfections in gemstones effectively. Employs either a monocular or a binocular microscope.
Industry:Mining
An imaginary line in a crystal, crystal structure, or crystal lattice, about which it may be rotated to an identical configuration. If identity occurs once during a complete rotation of 360 degrees , the axis is a monad, twice a diad, thrice a triad, four times a tetrad, or six times a hexad.
Industry:Mining
An imaginary line in a crystal, crystal structure, or crystal lattice, about which it may be rotated to an identical configuration. If identity occurs once during a complete rotation of 360 degrees , the axis is a monad, twice a diad, thrice a triad, four times a tetrad, or six times a hexad.
Industry:Mining
