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Qutab Minar, as we find at present, was finally re-built by -
Volcanic Mudflows
Volcanic mudflows, also known as lahars, are fast-moving, deadly flows of mud, rocky debris, and water that originate from volcanic eruptions or the melting of snow and ice atop volcanoes.
Composite Volcano
A volcano composed of layers of hardened lava, tephra, and volcanic ash, typically having a steep profile and explosive eruptions.
Shield Volcano
A broad, domed volcano with gently sloping sides, built by the eruption of fluid basaltic lava.
Fissure
A long, narrow opening or crack, especially one in the ground or in rock formations.