Question: Which mechanism on Earth usually results in Giant Ergs, which are deserts like the Sahara Desert? Need Assignment Help?
Group of answer choices Wet periods decay the rock producing sand, and then winds during dry periods transport the sand to the sand sea. You need three types of events to occur in sequence. First, you need a giant flood to move the sand from the mountains to the lowlands. Then, you need a windstorm of biblical proportions to blow the sand to a flat area. Then, you need a desert climate to allow the winds to blow the sands into the dune forms seen today. Extreme aridity is required to make the ergs of Earth. You need two types of events to occur in sequence. First, you need a giant flood to move the sand from the mountains to the lowlands. Then, you need a windstorm of biblical proportions to blow the sand to a flat area where it can pile up into an erg.