Basically two ways. Intrusive igneous rock is formed when magma cools and solidifies beneath the surface of the earth. These rocks are also called plutonic rocks.
Hurricane Irma is the strongest Atlantic basin hurricane ever recorded outside the Gulf of Mexico and the Caribbean Sea. It lasted as a hurricane from August 31 until September 11. The storm, which stretched 650 miles from east to west, affected at least nine US states, turning streets into rivers, ripping down power lines, uprooting trees and cutting off coastal communities.
Hurricane Irma has sown a trail of deadly devastation through the Caribbean (Picture: AFP/Getty Images) (Picture: AFP/Getty Images) The strength of Irmaâs winds have remained fairly consistent and were measured at 180mph this morning and it is thought it may well still be a Category 5 storm when it hits Florida.