TY - RPRT TI - Age constraints for Paleoproterozoic glaciation in the Lake Superior Region: Detrital zircon and hydrothermal xenotime ages for the Chocolay Group, Marquette Range Supergroup AU - D.A. Vallini AU - W.F. Cannon AU - K. J. Schulz PY - 2006 DO - 10.1139/e06-010 UR - https://pubs.usgs.gov/publication/70030489 ID - 70030489 ER -