TY - RPRT TI - SHRIMP U-Pb geochronology of volcanic rocks, Belt Supergroup, western Montana: Evidence for rapid deposition of sedimentary strata AU - K. V. Evans AU - J. N. Aleinikoff AU - J. D. Obradovich AU - C.M. Fanning PY - 2000 DO - 10.1139/e00-036 UR - https://pubs.usgs.gov/publication/70022581 ID - 70022581 ER -