Changes

    

    

==Sources==

==Sources==

* Montgomery, C.,Fundamentals of Geology, 3rd Ed., William C. Brown Publishers, 1997, Chicago, Illinois.

* Montgomery, C., 1997, Fundamentals of Geology, 3rd Ed.: William C. Brown Publishers, Chicago, IL.

* Murphy, B. and Nance, D.,Earth Science Today, Brooks/Cole Publishing Co., 1999, Pacific Grove, California.

* Murphy, B. and Nance, D., 1999. Earth Science Today: Brooks/Cole Publishing Co., Pacific Grove, CA.

* National Academy of Sciences for the American Geological Institute,Dictionary of Geological Terms, Dolphin Reference Books Edition, 1962, University of California Press.

* National Academy of Sciences for the American Geological Institute, 1962, Dictionary of Geological Terms: Dolphin Reference Books Edition, University of California Press.

==Useful links==

==Useful links==