The Earth and Environmental Science Department will host Dr. Giday WoldeGabriel of Los Alamos National Laboratory for the weekly seminar. WoldeGabriel will present, "Chaotic Geodynamic Processes and Hominid Records in the Afar Rift, Ethiopia." Sponsored by the Department of Earth and Environmental Science and N.M. Bureau of Geology and Mineral Resources. Hosted by Dr. Nelia Dunbar and Peter Revelle. 4 p.m. in MSEC 101.