Specimen Details

  • Number Of Specimens

    1

  • Rock Name

    Mylonite

  • Rock Class

    Metamorphic

  • Rock Group

    Mechanical Metamorphic

  • Rock Description

    This generally fine grained specimen is a good example of what is termed, flaser gneiss, The USGS defines flaser gneiss as: "A dynamically metamorphosed rock in which lenses or layers of original or relatively unaltered granular materials are surrounded by a matrix of highly sheared and crushed material, giving the appearance of a crude flow structure." In this specimen, a fine grained orthoclase, quartz, biotite gneissis bisected by a sheer zone in which the original gneissic texture has been destroyed.

  • Category

    Natural Sciences

  • Scientific Group

    Geology

  • Discipline

    Petrology

  • Collecting Areas

    Rocks and Ores

  • Type of Item

    Specimen

Geospatial Information