000256098 000__ 01499cam\a2200349\a\45e0 000256098 001__ 256098 000256098 005__ 20220217104624.0 000256098 007__ he\bmb024bbca 000256098 008__ 020212s1999\\\\coua\\\\bb\\\f000\0\eng\c 000256098 035__ $$a(OCoLC)ocm48981934 000256098 035__ $$a256098 000256098 040__ $$aGPO$$cGPO 000256098 042__ $$apcc 000256098 043__ $$an-us-va 000256098 049__ $$aISEA 000256098 074__ $$a0624-H (MF) 000256098 0860_ $$aI 19.76:99-552 000256098 1001_ $$aKunk, Michael J. 000256098 24510 $$a40Ar/39 Ar age-spectrum data for amphibole, muscovite, biotite, and K-feldspar samples from metamorphic rocks in the Blue Ridge anticlinorium, northern Virginia$$h[microform] /$$cby Michael J. Kunk and William C. Burton. 000256098 2463_ $$a40Ar/39 Ar age spectrum data for amphibole, muscovite, biotite, and K-feldspar samples from metamorphic rocks in the Blue Ridge anticlinorium, northern Virginia 000256098 260__ $$a[Denver, CO] :$$bU.S. Geological Survey :$$b[Branch of Information Services, distributor],$$c1999. 000256098 300__ $$a110 p. :$$bill. ;$$c28 cm. 000256098 4901_ $$aOpen-file report ;$$v99-552 000256098 500__ $$aCover title. 000256098 500__ $$aShipping list no.: 2002-0124-M. 000256098 504__ $$aIncludes bibliographical references (p. 110). 000256098 533__ $$aMicrofiche.$$b[Denver, Colo. :$$cU.S. Geological Survey,$$d2002]$$e2 microfiches : negative. 000256098 650_0 $$aPotassium-argon dating. 000256098 650_0 $$aMetamorphic rocks$$zVirginia. 000256098 7001_ $$aBurton, William C.$$q(William Chapin),$$d1952- 000256098 7102_ $$aGeological Survey (U.S.) 000256098 830_0 $$aU.S. Geological Survey open-file report ;$$v99-552. 000256098 85230 $$bdfich$$hI 19.76:$$i99-552 000256098 909CO $$ooai:library.usi.edu:256098$$pGLOBAL_SET 000256098 980__ $$aBIB 000256098 980__ $$aGOV RESOURCE