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What kind of rock is a geode?

April 26, 2017geode rock

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What kind of rock is a geode?

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A geode is basically a pocket or space or vug in an igneous or sedimentary rock structure that has partially filled or completely filled with minerals that have formed as a result of solutions entering the space. Because the mineralization mostly involves silicate deposition, the geode may be more erosion resistant that the rock that surrounds it. When the surrounding rock weathers and erodes, the geodes remain.