+A **fissure** is a deep, narrow opening, a natural [crack](/wiki/crack) or [cleft](/wiki/cleft) in a surface. It can describe a geological formation, a break in organic tissue, or a symbolic division.
+## See also
+- [Rift](/wiki/rift)
+- [Fracture](/wiki/fracture)
+- [Crevice](/wiki/crevice)
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