Original: The fourth and final feature are the Marrah Mountains, volcanic plugs created by a massif, that rise up to a peak at Deriba crater where there is a small area of temperate climate, high rainfall and permanent springs of water.
Simplified: The fourth and final feature are the Marrah Mountains, that rise up to a peak at Deriba crater where there is a small area of temperate climate, high rainfall and permanent springs of water.