TY - RPRT TI - Paleomagnetic and 40Ar/39Ar results from the Grant intrusive breccia and comparison to the Permian Downeys Bluff sill — Evidence for Permian igneous activity at Hicks Dome, southern Illinois Basin AU - Richard L. Reynolds AU - Martin B. Goldhaber AU - Lawrence W. Snee PY - 1997 DO - 10.3133/b2094g UR - https://pubs.usgs.gov/publication/b2094G ID - b2094G ER -