. Bulletin - New York State Museum. Science. ]f yti 11II It n irii n A' 4-/(1 U II M H H 11 ti II II II IIII IIII11 It II ri H lilt n II II ti II n II II ri It II I! <i n II II n II II 11,11 II •( IIII II n IIII II It tt It ii II It 11 It H II II II 11 " H M n II n II II It II H It. r^ J- J_ -1- J_ ^ H H H II II II II H + + + + + anorthosite syenite dike syenite Fig. 1 Relationship of syenite and anorthosite, as shown in an exposure 2 miles northeast of Tupper Lake village, and not far south of the Wawbeek road. Scale i inch = 3i feet this, of itself suggesting that part of the mass ha
. Bulletin - New York State Museum. Science. ]f yti 11II It n irii n A' 4-/(1 U II M H H 11 ti II II II IIII IIII11 It II ri H lilt n II II ti II n II II ri It II I! <i n II II n II II 11,11 II •( IIII II n IIII II It tt It ii II It 11 It H II II II 11 " H M n II n II II It II H It. r^ J- J_ -1- J_ ^ H H H II II II II H + + + + + anorthosite syenite dike syenite Fig. 1 Relationship of syenite and anorthosite, as shown in an exposure 2 miles northeast of Tupper Lake village, and not far south of the Wawbeek road. Scale i inch = 3i feet this, of itself suggesting that part of the mass has been cut away by the syenite. In addition it is everywhere cut through by dikes of the syenite, both large and small, and in increasing number as the main syenite mass is neared. The wider dikes show a rock identical in all respects with the syenite about Tupper Lake, sometimes basic, at others not so, and there can be no question that they represent direct offshoots from the main intrusion, cutting into the anorthosite. From these larger dikes, composed of normal syenite, slender branches may be Seen running out into the anorthosite, and in these the rock is at once recognized as identical with that found in the more remote slender dikes, giving a demonstration of their origin, and cf the fact that they differ from the ordinary rock because of their. slenderness, and hence more rapid cooling. In figure i is given a. 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 New York State Museum; New York State Museum. Albany : New York State Education Dept
Size: 1480px × 1689px
Photo credit: © Book Worm / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1800, bookdecade1880, booksubjectscience, bookyear1887
