Geochemistry and stratigraphic relations of Middle Proterozoic rocks of the New Jersey Highlands /

av Volkert, Richard A.
Washington : Denver, CO : U.S. G.P.O. : U.S. Dept. of the Interior, U.S. Geological Survey ; For sale by U.S. Geological Survey, Information Services, 1999

Late Proterozoic diabase dikes of the New Jersey Highlands : a remnant of Iapetan rifting in the north-central Appalachians /

av Volkert, Richard A.
Washington : Denver, CO : U.S. G.P.O. ; For sale by U.S. Geological Survey, Information Services, 1995