Very thorough and scholarly, with excellent discursions into other scholar's opinions on the subject. Also a great narrative arc to the entire presentation.
Marc Callis presented an engaging and informative presentation about Chaco Canyon. His visuals were clear and interesting, as was his narrative. I am sure there is A LOT more that Marc could share on this and related topics, but the breadth and depth of the talk seemed well done for a short experience. I will watch for future offerings from him!