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.
The hurricane caused close to $62 billion in damage in the United States and at least $315 million in the Caribbean. Hurricane Sandy is the nationâs most expensive storm since Hurricane Katrina, which caused $128 billion in damage. New York was most severely impacted due to damage to subways and roadway tunnels. In New York and New Jersey, storm surges were 14 ft above the average low tide.