Secondly, I owe a great deal of gratitude to my major professor, Dr. Barry Keim, who spent many hours helping, advising and being a good friend. Without him, I would not, without a doubt, have been able to finish my master's requirements and also to Dr. Margaret Reams my co-advisor for her gracious help. To my thesis committee, I owe much for their patience and guidance. They are Professor Jeffrey Hanor, who provided advice on geological content, and Professor Margaret Reams as well as

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... Barry Keim. Also much willing computer help and shared friendship was given to me by the graduate students in the Climatology Program.