After the Civil War, four geological and geographical surveys, later called the Great Surveys, Undertook the massive task of finding out what lay West of the hundredth meridian in the vast American wilderness.
Wheeler, determined military man and scientist, roamed over the wild country during th.
Parties led by Ferdinand Vandiveer Hayden, medical doctor turned geologist, Clarence King, aristocrat and intellectual, John Wesley Powell, conqueror of the Colorado River, and Lieutenant George M.
After the Civil War, four geological and geographical surveys, later called the Great Surveys, Undertook the massive task of finding out what lay West of the hundredth meridian in the vast American wilderness