http://www.nlevin.net/Home0.8http://www.nlevin.net/cv0.5http://www.nlevin.net/projects0.5http://www.nlevin.net/publications0.5http://www.nlevin.net/teaching0.5http://www.nlevin.net/teaching/2011-sed-geo-field-trips0.5http://www.nlevin.net/teaching/field-trips0.5