This happens as the magma chamber empties and a ring fracture occurs. This collapse often blocks the flow of magma but the heated interior still produces gasses and steam. Often, that steam and other gasses create a lake in the middle of the caldera Continue Reading...
Continental tropical (cT) air masses are hot, dry, unstable at low levels and generally stable aloft (upper-level ridge); they originate in northern Mexico. Continental polar (cP) or continental arctic (cA) air masses are cold, dry, and stable origi Continue Reading...
Rising From the Plains John Mcphee, a writer of creative nonfiction books, started writing about the earth in 1985. He described the structure and movement of the earth's crust and mantle based on geology. He focused on the theory called plate tecto Continue Reading...
