The underlying rock formation derives from the Kaapvaal craton, formed as a precursor island roughly 2.7 billion years ago. This crustal formation became the base of the Waterberg, which was further transformed by upward extrusion of igneous rocks. The original extent of this rock upthrust involved about 250,000 square kilometers, and is sometimes called the Waterberg Supergroup.
Sedimentary deposition from rivers cutting through Waterberg endured until roughly 1.5 billion years ago. In more recent time (around 250 million years ago) the Kaapvaal craton collided with the supercontinent Gondwana, and split Gondwana into its modern day continents. Waterberg today contains mesas, buttes and some kopje outcrops. Some of cliffs stand up to 550 meters above the plains, with exposed multi-coloured sandstone.
More information concerning the Waterberg includes: