PT - JOURNAL ARTICLE AU - James Dwight Dana TI - Some of the features of nonvolcanic igneous ejections, as illustrated in the four "Rocks" of the New Haven region, West Rock, Pine Rock, Mill Rock, and East Rock AID - 10.2475/ajs.s3-42.248.79 DP - 1891 Aug 01 TA - American Journal of Science PG - 79--110 VI - s3-42 IP - 248 4099 - http://www.ajsonline.org/content/s3-42/248/79.short 4100 - http://www.ajsonline.org/content/s3-42/248/79.full SO - Am J Sci1891 Aug 01; s3-42