Geology terms helps us to explain the phenomena that occurs above, below and on the surface of Earth. These terms can help you gain a better understanding of geology. Learn more geology terms here.


Crystal, a solid body formed by atoms, ions, or molecules arranged in a regular, three-dimensional pattern.

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  • Hydrosphere


    Hydrosphere, the waters of the earth. Oceans, lakes, rivers, and glaciers cover about three-fourths of the earth's surface, and groundwater is present in most rock structures. See more »

  • Hydrothermal Vent

    Hydrothermal Vent

    Hydrothermal Vent, a fissure, or crack, on the ocean floor from which heated water flows. See more »

  • Ignis Fatuus

    Ignis Fatuus

    Ignis Fatuus, a pale, greenish or bluish light sometimes seen hovering over swamps and marshes at night. See more »

  • International Geophysical Year (IGY)

    International Geophysical Year (IGY)

    International Geophysical Year (IGY), a period of extensive study of the earth by geophysicists and other scientists of many countries working in close cooperation. See more »

  • Marshes and Swamps

    Marshes and Swamps

    Marshes and Swamps, areas in which the land is usually covered with shallow water. See more »

  • Metallography


    Metallography, the microscopic study of the structure of metals and their alloys. See more »

  • Mineral Water

    Mineral Water

    Mineral Water, water containing dissolved mineral salts. The mineral salts may occur naturally in the water or they may be added to it. See more »

  • Moho


    Moho, or Mohorovicic Discontinuity, a zone in the earth below which shock waves travel more rapidly than they do above it. See more »

  • Moonstone


    Moonstone, a moderately hard, transparent or translucent gemstone with a pearly or milky luster. See more »

  • Oasis


    Oasis, (plural: oases), a fertile green area in a desert where water is available. See more »

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