hornfels definition

  • noun:
    • A fine-grained metamorphic rock made up of quartz, feldspar, mica, as well as other nutrients, created by the action of invasive rock upon sedimentary rock, specifically shale.
    • Any of a number of contact metamorphic rocks which have been baked and indurated by the heat of invasive igneous public and rendered massive, hard, splintery, and perhaps exceedingly hard and durable.
    • In petrography, a dense, aphanitic stone consists of feldspar, quartz, along with other nutrients, frequently an item associated with contact-metamorphism of an intrusive stone upon shale or other sedimentary rock. Occasionally known as hornstone.
    • a fine-grained metamorphic stone created by the action of temperature on clay rocks

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