Description: (US Geologist Who Made Pioneering Research on the Rocky Mountains and the Great Plains)
Ferdinand Vandeveer Hayden was a prominent American geologist and physician known for his groundbreaking surveying missions of the Rocky Mountains during the late 19th century. His expeditions significantly advanced geological knowledge of the region. Hayden's service in the Union Army during the Civil War showcased his commitment to both scientific exploration and public service. His contributions to the fields of geology and geography have had a lasting impact on American scientific endeavors.