TY - RPRT TI - Zircon ages of felsic volcanic rocks in the upper Precambrian of the Blue Ridge, Appalachian mountains AU - D.W. Rankin AU - T. W. Stern AU - J. C. Reed AU - M. F. Newell PY - 1969 DO - 10.1126/science.166.3906.741 UR - https://pubs.usgs.gov/publication/70010203 ID - 70010203 ER -