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.


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

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  • Earth Science

    Earth Science

    Earth Science, a general term for the fields of study that deal with the earth as a physical object. See more »

  • Geochemistry


    Geochemistry, the application of the science of chemistry to the study of the earth. See more »

  • Geode


    Geode, a hollow, rounded mineral body. A typical geode contains an outer layer of chalcedony, or fine-grained quartz, lined on the inside with crystals of quartz, calcite, or some other mineral. See more »

  • Geodesy


    Geodesy, the science of measuring the shape and size of the earth and of determining the exact location of points on the earth's surface. See more »

  • Geophysics


    Geophysics, the application of the science of physics to the study of the earth. See more »

  • Glacial Period

    Glacial Period

    Glacial Period, or Ice Age, a time when continental glaciers, resembling those now on Greenland and Antarctica, covered almost a third of the world's land surface. See more »

  • Hot Spring

    Hot Spring

    Hot Spring, or Thermal Spring, a spring that discharges water warmer than normal body temperature. See more »

  • 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 »

  • Ice


    Ice, frozen water. (Dry ice is not frozen water, but carbon dioxide in solid form) Under ordinary conditions, water changes to ice at 32 F. See more »

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