RT Journal Article SR Electronic T1 Contributions to lithology JF American Journal of Science JO Am J Sci FD American Journal of Science SP 248 OP 266 DO 10.2475/ajs.s2-37.110.248 VO s2-37 IS 110 A1 Thomas Sterry Hunt YR 1864 UL http://www.ajsonline.org/content/s2-37/110/248.abstract AB