Marlon Cook is manager of the Hydrogeology Group at the Geological Survey of Alabama. He earned a Bachelor of Science degree in Geology and a Master of Science degree in Hydrogeology from the University of Alabama. He was an Exploration Geophysicist in oil and gas exploration in Tulsa, Oklahoma; Jackson, Mississippi; and Houston, Texas and has worked for the past 17 years as a Hydrogeologist with the Geological Survey of Alabama involved in research to protect and develop the groundwater and surface water resources of Alabama. This work includes aquifer assessments, hydrostratigraphic and geochemical analyses, and watershed investigations.