RT Journal Article SR Electronic T1 Impact friction and faulting JF American Journal of Science JO Am J Sci FD American Journal of Science SP 116 OP 128 DO 10.2475/ajs.s3-30.176.116 VO s3-30 IS 176 A1 George Ferdinand Becker YR 1885 UL http://www.ajsonline.org/content/s3-30/176/116.abstract AB