Acraton 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 future?
why or why not?

The diagram shows the positions of the sun, moon and earth during spring tides, when the high tides are at their highest and low tides at their lowest. what is it about these positions that causes these high and low tides?

Why would the crystals in an intrusive igneous rock be larger than the crystals in a chemical sedimentary rock? a. intrusive rocks form beneath the earth's surface, so they cool very slowly, which produces larger crystals. b. chemical sedimentary rocks form from dissolved substances on the earth's surface with very high heat and cool very slowly, which produces smaller crystals. c. chemical sedimentary rocks and intrusive rocks have crystals of the same size. o d. chemical sedimentary rocks form deep in the earth, so they cool slower, which produces small crystals. € read question correct:

Compare the partition of southeast asia to the partition of africa how was it similar