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Semiquantitative spectrographic (31 elements) analyses, atomic absorption analyses for zinc and gold, and fluorometric analyses for uranium on 44 panned concentrates, 58 fine-grained stream sediments, and 49 rocks from Tray Mountain Wilderness, Chattahoochee Roadless Area, and Blood Mountain Wilderness, in northeastern Georgia, are reported in detail. Brief descriptions of the rock specimens are also given. INTRODUCTION The analyses reported here are for 58 fine-grained stream sediments (Table 2) , 44 panned concentrates of active stream gravels (Table 3), and 78 rock samples (Table 4) from Overflow Creek Roadless Area, northeastern Georgia and adjacent North Carolina. The pan-concentrate and finegrained sediment samples were collected by R.P. Koeppen, C.S. Sears, and R.E. Luce during the period 1981-1982. rock samples were collected by R.P. Koeppen and A.E. Nelson, in association with geologic mapping of the study areas during 1982. Brief descriptions of the rock samples are given in Table 1. Maps showing sample localities and discussion of the analytical data are given in Koeppen and Nelson (1989; in press). ANALYTICAL TECHNIQUES Panned-concentrate samples were prepared for chemical and mineralogical analyses by C.M. Sears in the U.S. Geological Survey laboratories in Reston, VA. These concentrates were washed in bromoform to remove light minerals then passed by a hand magnet to remove most magnetite. The remaining material was then split into magnetic and nonmagnetic fractions on a Frantz isodynamic separator, at a settings of 0.6 amp. The two fractions were crushed and pulverized to minus 140-mesh, and analyzed. Fine-grained stream-sediments were dried and sieved to minus 80-mesh (0.006 in.) then pulverized to minus 140-mesh (0.004 in.). Rock chips were similarly pulverized. Each sample was analyzed semi-quantitatively for 31 elements by a six-step, D.C.-(direct current) arc, optical-emmission spectrographic method (Grimes and Marranzino, 1968) by D.E. Detra, J.A. Domenico, and B.M. Adrian at the U.S. Geological Survey laboratories in Denver, Colo. Semiquantitative spectrographic analytical values are reported as six steps per order of magnitude (1.0, 0.7, 0.5, 0.3, 0.2, 0.15, or multiples of 10 of these numbers) and are approximate geometric midpoints of the concentration ranges whose boundaries are 1.2, 0.83, 0.56, 0.38, 0.26, 0.18, 0.12, etc. The precision is shown to be within one adjoining reporting interval on each side of the reported value 83 percent of the time and within two adjoining intervals 96 percent of the time (Motooka and Grimes, 1976). More sensitive analyses were done for gold, zinc, and Uranium. The analyses were made by L.M. Kelley, L.J. Sherlock, and A. Gruzensky. The gold and zinc determinations were by ordinary atomic absorption technique (Ward and others, 1969). Uranium was determined fluorometrically using the method of Centanni and others (1956).

Analyses and descriptions of geochemical samples, Overflow Creek Roadless Area, Rabun County, northeastern Georgia and Macon County, North Carolina