RT Journal Article SR Electronic T1 Sea-bottom deposits observed during the cruise of the Challenger in a report to Prof. Wyville Thomson JF American Journal of Science JO Am J Sci FD American Journal of Science SP 255 OP 270 DO 10.2475/ajs.s3-12.70.255 VO s3-12 IS 70 A1 John Murray YR 1876 UL http://www.ajsonline.org/content/s3-12/70/255.abstract AB