High Quality Content by WIKIPEDIA articles! Caleb Vance Haynes Jr. (born February 29, 1928), known as Vance Haynes or C. Vance Haynes Jr., is an archaeologist, geologist and author who specializes in the archaeology of the American Southwest. Haynes "revolutionized the fields of geoarchaeology and archaeological geology." He is known for unearthing and studying artifacts of Paleo-Indians including ones from Sandia Cave in the 1960s, work which helped to establish the timeline of human migration through North America. Haynes coined the term "black mat" for a layer of 10,000-year-old swamp soil seen in many North American archaeological studies.