He conducted archaeological work in the American Southwest, including Chimney Rock, Colorado,[1] and the Lower Río Chama Valley in northwestern New Mexico.
degree from the University of Denver, where he taught archaeology and ethnology as well as directing excavation camps in conjunction with the Colorado State Museum.
He is most known for his work excavating at Chimney Rock, Colorado, where he and his team discovered many artifacts that were added to the State Historical Society collections.
[5][4] His excavations at Poshuouinge in the Río Chama Valley in 1919 were conducted through the auspices of the Bureau of American Ethnology and funded by Otto Tod Mallery, a noted economist in Philadelphia, Pennsylvania.
Some of the artifacts from Jeançon's work in the Lower Río Chama Valley and later, along the Pecos River, were donated by Mallery to the University of Pennsylvania's Penn Museum.