Thin sections prepared primarily in the course of field work and research conducted by geologists of the Wisconsin Geological and Natural History Survey, UW-Extension. There appears to be a set of USGS-related thin sections, as well, but these are not evaluated at this time.
Original scope of this collection of material was not well known, but assessment of these items is continuing. Thin sections are tied to field notebooks, which are being reviewed as time allows. Certain physical collections have been located, but their geographic location is uncertain until the field notebooks can be tied to the actual thin section.
We must tie physical materials to field notebooks in order to develop geographic coordinates for specific thin sections. Work to date (September 2010) has identified locations of physical items and is currently focused on assessing the notebooks themselves.