01374oam 2200397 450 991070340380332120150122124141.0(CKB)5470000002431658(OCoLC)900215677(EXLCZ)99547000000243165820150115d1999 ua 0engurbn|||||||||rdacontentrdamediardacarrier40Ar/39 Ar age-spectrum data for amphibole, muscovite, biotite, and K-feldspar samples from metamorphic rocks in the Blue Ridge anticlinorium, northern Virginia /by Michael J. Kunk and William C. Burton[Reston, Va.?] :U.S. Geological Survey,1999.1 online resource (111 pages) illustrationsOpen-file report ;99-552Title from title screen (viewed on Jan. 14, 2015).Includes bibliographical references (pages 110-111).Potassium-argon datingMetamorphic rocksVirginiaPotassium-argon dating.Metamorphic rocksKunk Michael J.1384281Burton William C(William Chapin),1952-Geological Survey (U.S.),GPOGPOGPOBOOK991070340380332140Ar3439666UNINA