Zircon Ages of Felsic Volcanic Rocks in the Upper Precambrian of the Blue Ridge, Appalachian Mountains

Autor:	T. W. Stern, M. F. Newell, J. C. Reed, D. W. Rankin
Rok vydání:	1969
Předmět:	Volcanic rock geography Precambrian Multidisciplinary geography.geographical_feature_category Felsic Ridge Geochemistry Geology Zircon Nappe
Zdroj:	Science. 166:741-744
ISSN:	1095-9203 0036-8075
Popis:	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.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_dedup___::3aa1d5d5b8b21035dcf08facb8dcfb86 https://doi.org/10.1126/science.166.3906.741 Zobrazit plný text záznamu