Complex sentence: Albor Tholus is 4.5 km high and possesses at the base a diameter of 160 km. Its Caldera has a diameter of 30 km and is 3 km deep.
Split into simpler sentences: Albor Tholus is 4.5 kilometres high and has a diameter of 160 km at its base. Its caldera has a diameter of 30 km and is 3 km deep.