A special thanks to Dave Berry;

Source of Gangplank drawing; Structural geology of the Laramie Mountains, southeastern Wyoming and northeastern Colorado DLR Blackstone - 1996 - Wyoming State Geological Survey

United States History, Texas Aquifer, Kansas Aquifer, Nebraska Sandhills, Nebraska Sand Dunes, Transcontinental Railroad, Lincoln Highway, Interstate 80, Anorthosite, Ogallala Aquifer, Ogallala Formation, Geologic History,