Answer all three please 6) The oldest rocks in the world, located in the Jack Hills, are found on which continent? A.) Australia B.) North America C.) Africa D.) Asia 7) In what type of crust are the oldest rocks on Earth found? A.) Continental crust B.) Oceanic crust 8) What types of fossils are found in Archean-age sedimentary rocks? A.) Animals and plants B.) Single-celled organisms C.) Multicellular organisms D.) Tracks of worms and other burrowing animals.