RT Journal Article
SR Electronic
T1 Zircon Ages of Felsic Volcanic Rocks in the Upper Precambrian of the Blue Ridge, Appalachian Mountains
JF Science
JO Science
FD American Association for the Advancement of Science
SP 741
OP 744
DO 10.1126/science.166.3906.741
VO 166
IS 3906
A1 Rankin, D. W.
A1 Stern, T. W.
A1 Reed, J. C.
A1 Newell, M. F.
YR 1969
UL http://science.sciencemag.org/content/166/3906/741.abstract
AB Five Zirconi samples from Pennsylvania, Virginia, and North Carolina yield discordant uranium-lead ages which suggest an original age of 820 million years and an episodic lead loss at 240 million years. The indicated age of lead loss is interpreted as the age of movement of the Blue Ridge thrust sheet.