Igneous Rocks

Topics: Sedimentary rock, Igneous rock, Metamorphic rock Pages: 2 (566 words) Published: June 16, 2013
Incredible Igneous Rocks
Granite is one of the most well-known and commonly found types of igneous rock. Granite batholiths are a common rock type found in Richmond, VA. These larger igneous, intrusive rocks are found near my grandparents’ home in Richmond, and as a child I would constantly climb and play on them. Looking at granite in class always reminds me of these batholiths by my grandparents’ home. Granite consists mostly of the minerals quartz, mica and feldspar, which give granite its typical pink, white, and gray coloring. For this reason, it is sometimes defined by a “salt and pepper coloring”. This light coloring and mineral content clearly makes granite a felsic rock type. Granite can be possess several different pattern types from similar grain to stones of many colors with veins and different shadings, all depending on how the minerals are distributed within the rock. But for the most part, the texture of granite is granular, but large enough to see with the unaided eye, distinguishing it as phaneritic. It is definitely distinguishable by its unique durability and strong composition. Besides Richmond, granite can be found in almost every state near mountain ranges and is a major component of the continental crust.

Super Sedimentary Rocks
A very special type of sedimentary rock type for me is coquina. I grew up in Gloucester, VA which is about 10 minutes from Yorktown, VA. Yorktown is one of the most historic areas of America, and being that, my family and I spent a lot of time visiting landmarks, going on tours, and exploring Yorktown to learn more about the historic significance of the town. One place we would constantly visit is Cornwallis Cave in Yorktown. This cave was used during the Revolutionary War before the Battle of Yorktown. It is believed that General Cornwallis of Britain used this cave to store all of his ammunition and weapons. Coquina is a type of limestone. In order to be identified as coquina, the rock must have particles...

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