I’m a geologist and geoarchaeologist currently adjunct at the University of Arizona, formerly with U. S. Geological Survey. I’m using this site 1) to make available references to my pre-pdf publications, mostly on the geology of titanium-mineral and manganese deposits, Four Corners geoarchaeology and geology of New Zealand and Liberia (in CV below), 2) to post work that is still unpublished in a discussion-paper format, and 3) to post pdf’s of my recent published work on Nova Scotia and on the tectonic environments of ancient complex cultures.