1) the river widens
2) the river is naturally dammed by hard rock
3) when the river flows across horizontal or less vertical land
4) when the river is nearing the ocean and is slowed by tidal influence
North Africa is Muslim. Western Part of Southern Europe is Catholic. Eastern part of Southern Europe is Orthodox.
It can pollute the ground and water.
<span>The maximum height of a Cinder cone volcano is usually around 100m to 400m. Cinder cone volcano is usually in moderately slope form. The magma types found in cinder cone is basaltic or andesitic which has minerals Mg, Fe and Ca and ejects pyroclastic material.</span>