The Jurassic gives way to the Cretaceous Period in the upper rocks of the Makuleke area, and these are particularly evident in the North and East of the Pafuri triangle. In these upper-most rocks - the region still seems to be dominated by deserts but these seem to give way to water born gravels that may indicate the emergence of the ancient Limpopo in the region. This is particularly evident in areas like Matule hill, where abundant gravels contain large and small bone fragments that appear to be those of medium-sized and small dinosaurs. Fossil wood typical of the Cretaceous flora have also been found in the rocks of the region. The Cretaceous Period lasted from about 144 million years ago until 66 million years when the Cretaceous–Paleogene extinction event occurred. While the Cretaceous is often referred to as the end of the age of dinosaurs, many new lifeforms appeared. This is the age of "Tyrannosaurus rex" and the ceratopsian dinosaurs (armoured and horned dinosaurs like "Triceratops"). The abundant marine deposits of the North East coast of South Africa are of this age. There is also the hope of finding the rarest forms of vertebrates alive in this time period – the tiny mammals which would eventually dominate the planet after the Cretaceous extinction event.