01041cam a22003011 4500 gs 66000171 DLC 20260227111419.0 780715s1966 dcua b f000 0 eng gs 66000171 (OCoLC)4055249 DLC OClU OCoLC DLC premarc QE75 .B9 no. 1209 Tatlock, Donald Bruce, 1923- Rapid modal analysis of some felsic rocks from calibrated X-ray diffraction patterns, by D. B. Tatlock. Washington, U.S. Govt. Print. Off., 1966. iv, 41 p. illus. 24 cm. Geological Survey (U.S.). Bulletin, 1209 Running title: X-ray modal analysis of felsic rocks. "Prepared in cooperation with the Nevada Bureau of Mines." Bibliography: p. 39-41. Rocks Analysis Igneous rocks. X-rays Diffraction. Nevada Bureau of Mines. X-ray modal analysis of felsic rocks. 30206 30206