TY - RPRT TI - Petrology and U-PB geochronology of the Robertson River Igneous Suite, Blue Ridge province, Virginia - Evidence for multistage magmatism associated witn an early episode of Laurentian rifting AU - Richard P. Tollo AU - John N. Aleinikoff PY - 1996 DO - 10.2475/ajs.296.9.1045 UR - https://pubs.usgs.gov/publication/70018132 ID - 70018132 ER -