This historic book may have numerous typos and missing text. Purchasers can usually download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1908 edition. Excerpt: ... EXPLANATION OF PLATE XXXII. Photomicrographs of thin sections. Fig. 1. Altered Coediebite-hoenfels (spilosite, Ob "spotTed Slate"), old copper mine, 1 mile south of Griggstown. Magnified 10 diameters. Shows a large hexagonal cordierite replaced by a mass of chlorite and magnetite granules. Thin ...
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This historic book may have numerous typos and missing text. Purchasers can usually download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1908 edition. Excerpt: ... EXPLANATION OF PLATE XXXII. Photomicrographs of thin sections. Fig. 1. Altered Coediebite-hoenfels (spilosite, Ob "spotTed Slate"), old copper mine, 1 mile south of Griggstown. Magnified 10 diameters. Shows a large hexagonal cordierite replaced by a mass of chlorite and magnetite granules. Thin section Xo. 275-L. Fig. 2. Alteeed Coediebite-hoenfels, same locality as Fig. 1. Magnified 10 diameters. Rectangular pseudomorph of chlorite after cordierite. Thin section Xo. 287-L. Fig. 3. Altered Cobdiebite-iiobnfels, same section as Fig. 2. Magnified 10 diameters. A hexagonal chlorite pseudomorph after cordierite. Fig. 4. CoEDiERiTE-HORNFELs, west end of N. Y., 8. & W. B. R. tunnel, near Fairview; 130 feet west of the upper contact of the Palisade diabase. Magnified 10 diameters. Shows cordierite crystals largely altered to mixtures of muscovite, biotite and magnetite, though still retaining unaltered remnants of the original mineral. Thin section Xo. 78-L. Fig. 5. Altered Cordierite-hornfels, same section as Fig. 1. Magnified 10 diameters. Shows a pseudo-hexagonal chalcocite crystal and connecting veinlet of the same mineral. Fig. 6. Scapolite-hoenfels, Byram. Magnified 10 diameters. Shows a groundmass of fine-grained feldspar, elongated flakes of biotite and rounded granules of hornblende and augite, surrounding a large central area of scapolite. Small transparent crystals of apatite are present, but do not show in the figure. Thin section Xo. 313-L. ing clear spaces. The segments of the pseudo-hexagonal trillings are also sometimes outlined by magnetite granules. Chalcocite crystals occur in some of the chlorite pseudomorphs of cordierite and other parts of the hornfels (spilosite) at the Griggstown copper mine (Plate XXXII., Fig. 5)....
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Add this copy of Petrography of the Newark Igneous Rocks of New Jersey to cart. $16.27, new condition, Sold by Ingram Customer Returns Center rated 5.0 out of 5 stars, ships from NV, USA, published 2022 by Legare Street Press.
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Add this copy of Petrography of the Newark Igneous Rocks of New Jersey to cart. $27.44, new condition, Sold by Ingram Customer Returns Center rated 5.0 out of 5 stars, ships from NV, USA, published 2022 by Legare Street Press.
Add this copy of Petrography of the Newark Igneous Rocks of New Jersey to cart. $40.17, new condition, Sold by Ria Christie Books rated 5.0 out of 5 stars, ships from Uxbridge, MIDDLESEX, UNITED KINGDOM, published 2022 by Legare Street Press.