(i) Eruption of lava through a central vent causes building up of a cone.
(ii) The lava in the vent cools and contracts.
(iii)The cool lava withdraws into the vent leaving a shallow depression of the cone.
(iv) Gas explosions may blow away surface rocks causing a crater.
Some of craters are Mt Menengai,Mt Suswa and Mt Longonot.
maurice.mutuku answered the question on June 5, 2017 at 11:19
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