. Annual report. New York State Museum; Science; Science. SiS NEW YORK STATE MUSEUM Or ] Al. An. . Mt. . . Ti. . ?76 42 12 .20 } 9i-42 Class, ^—L Fem. Order, § : QI -42 7-94 0 J ,.581 I Rang. 7-94 Subrang, F K2Q' + Xs CaO' K2Q- _ Na20' _ ^3 81 ; = 1, persalane 5. canadare 2, pulaskase 68 = 3, pulaskose = ii6= Total The rock falls close to the boundary between subrangs 3 and 4, or is close to laurvikose, showing thus its close relationship with the considerably more basic rock of analysis 3. The Little Falls rock (analysis 7) has beau
. Annual report. New York State Museum; Science; Science. SiS NEW YORK STATE MUSEUM Or ] Al. An. . Mt. . . Ti. . ?76 42 12 .20 } 9i-42 Class, ^—L Fem. Order, § : QI -42 7-94 0 J ,.581 I Rang. 7-94 Subrang, F K2Q' + Xs CaO' K2Q- _ Na20' _ ^3 81 ; = 1, persalane 5. canadare 2, pulaskase 68 = 3, pulaskose = ii6= Total The rock falls close to the boundary between subrangs 3 and 4, or is close to laurvikose, showing thus its close relationship with the considerably more basic rock of analysis 3. The Little Falls rock (analysis 7) has beautiful cataclastic structure with the production of much finely granular feldspar and quartz which can not with certainty be distinguished in the thin section. The quartz and feldspar had therefore to be measured together in the determination of'the mode. Mode of Little Falls syenite (toscanose) analysis 7 Units Units measured Sp. Gr. by weight Quartz and feldspar Plornblende Pyroxene Magnetite Biotite Apatite Titanite Zircon Pyrite. 7444 604 165 158 60 32 38 *3 IS Total, 3168 !529 weight I 85 o. 70 o-37 Or 33-42] Ab. ... An ~ * * ' ' ' -1 Qz 13-47 J Mt. 2 .2 3-59| o-37J Norm of Little Falls syenite > 9*--S* Sal. ClaSS' Fem:= 87o4 0rder,| = ^7 = • F K20' + Na20' persalane v Ran-" -CaXT Subrang, K2°' Na20- 7 = 4. britannare b36 2. 6= 2, toscanase 547 816 .67 = 3, toscanose Total The quartz-feldspar ratio is nearly low enough to throw the rock into order 5 instead of 4, so that it is a toscanose close to 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. Albany : University of the State of New York
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Keywords: ., bookcentury1900, bookdecade1900, booksubjectscience, bookyear1902
