RT Journal Article SR Electronic T1 On the great lava flows and intrusive trap sheets of the Newark system in New Jersey JF American Journal of Science JO Am J Sci FD American Journal of Science SP 134 OP 139 DO 10.2475/ajs.s3-38.224.134 VO s3-38 IS 224 A1 Nelson Horatio Darton YR 1889 UL http://www.ajsonline.org/content/s3-38/224/134.abstract AB