00920cam a22002891 4500 gs 43000028 DLC 20260227111348.0 780808s1943 oruab b s000 0 eng c gs 43000028 (OCoLC)4120184 U. S. Geol. Survey. Libr. NcRS NcRS OCoLC DLC n-us-or x4x4 QE155 .A3 no. 24 QE581 .T76 558.62 Twenhofel, William H. (William Henry), 1875-1957. Origin of the black sands of the coast of southwest Oregon, by W. H. Twenhofel. [Portland] 1943. 25 p. illus., maps. 28 cm. Oregon. Dept. of Geology and Mineral Industries. Bulletin no. 24 Bibliography: p. 25. Black sand Oregon. Sedimentation and deposition Oregon. Geology Oregon. 27882 27882