Extrusive igneous rocks are formed on the surface of the earth. These rocks are formed as a result of a volcanic eruption. Most have a fine grained texture made of small crystals due to rapid cooling. However, some of the lava cools so quickly that no crystals have time to form. An example of this type of rock is obsidian, commonly called black glass or volcanic glass.
Hurricane Sandy (unofficially known as Superstorm Sandy) was the deadliest and most destructive hurricane of the 2012 Atlantic hurricane season, and the second-costliest hurricane in United States history.
Here's Proof That Hurricane Sandy Is Nothing Like Irene. 2012-10-29 18:16:05 UTC. The photo on the left is a screenshot of Hurricane Irene, taken from the Weather Channel's iPad app. The photo on the right side shows the same app screen of Hurricane Sandy, taken today at 1:20 p.m. Last year, New York City boarded up its stores and shut down its subways in preparation for the worst of Hurricane Irene.