RT Journal Article SR Electronic T1 Geological age of the Saganaga syenite JF American Journal of Science JO Am J Sci FD American Journal of Science SP 386 OP 390 DO 10.2475/ajs.s3-41.245.386 VO s3-41 IS 245 A1 Horace Vaughan Winchell YR 1891 UL http://www.ajsonline.org/content/s3-41/245/386.abstract AB