. Bulletin of the Geological Society of America. Geology; Geology -- United States. 248 W. S. BAYLLY—SYENITES FROM NEW ENGLAND. The feldspar was the latest of all the components to crystallize. It ((in- stitutes about 80 per centof the entire rock, and occurs almost exclusively in large Carlsbad twins, with irregular outlines. In spite of the abun-. Figuke '1.—Occurrence of Nepkeline and Sodalite in Feldspar. l = Nepheline ; 2 = Sodalite. dance of apparent crystals in the hand-specimen, the thin section contains lid grains with idiomorphic forms. All have such shapes as are permitted them hy s
. Bulletin of the Geological Society of America. Geology; Geology -- United States. 248 W. S. BAYLLY—SYENITES FROM NEW ENGLAND. The feldspar was the latest of all the components to crystallize. It ((in- stitutes about 80 per centof the entire rock, and occurs almost exclusively in large Carlsbad twins, with irregular outlines. In spite of the abun-. Figuke '1.—Occurrence of Nepkeline and Sodalite in Feldspar. l = Nepheline ; 2 = Sodalite. dance of apparent crystals in the hand-specimen, the thin section contains lid grains with idiomorphic forms. All have such shapes as are permitted them hy surrounding grains; so that we have in this feldspathic portion. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Geological Society of America. [New York, etc. ] The Society
Size: 1499px × 1667px
Photo credit: © Book Worm / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookauthorge, booksubjectgeology, booksubjectgeologyunitedstates
