TY - RPRT TI - Thermal history of low metamorphic grade Paleoproterozoic sedimentary rocks of the Penokean orogen, Lake Superior region: Evidence for a widespread 1786 Ma overprint based on xenotime geochronology AU - D.A. Vallini AU - W.F. Cannon AU - K. J. Schulz AU - N.J. McNaughton PY - 2007 DO - 10.1016/j.precamres.2007.02.015 UR - https://pubs.usgs.gov/publication/70031131 ID - 70031131 ER -