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A craton is a large, stable portion of Earth's lithosphere that makes up part of a continent.
The Kaapvaal craton in Africa is one of five ancient cratons left from the Precambrian era.
The rock has remained tectonically stable since its
formation 3.6 billion to 2 billion years
ago. What do you think the term "tectonically stable" means? Why do you think this rock
formation is important to understanding the history of Earth? Do you think studying
ancient rock formations such as the Kaapvaal craton can teach scientists not only about
Earth's past but also its