PT - JOURNAL ARTICLE AU - G. H. Williams TI - The norites of the Cortlandt Series on the Hudson River near Peekskill, NY AID - 10.2475/ajs.s3-33.195.191 DP - 1887 Mar 01 TA - American Journal of Science PG - 191--199 VI - s3-33 IP - 195 4099 - http://www.ajsonline.org/content/s3-33/195/191.short 4100 - http://www.ajsonline.org/content/s3-33/195/191.full SO - Am J Sci1887 Mar 01; s3-33