Proceedings of the United States National Museum . 0 101 do 52 03 90 00 51 42 90 00 4 J -10 102 Medium, dou-ble. 81 25 90 00 81 03 90 00 5 n -1 111 Good. 54 43 36 09 51 54 35 13 6 0 01 Oil Very poorsliim. 64 47 33 18 64 36 31 31 CRYSTAL 2. Form. Symbol. Measured Calculated. Quality de-scription. No. Letter. Gdt. Miller. f // p / P 1 t ooO 100 Multiple sig-nal. o 0 01 0 90 115 o / 0 00 0 / 90 00 2 c 0 001 Verv poor, dim 64 30 90 00 64 36 90 00 3 r -10 101 Very poor,narrow. 51 47 90 00 51 42 90 00 4 I -§o 102 Medium, poor 80 34 91 33 81 03 90 00 5 n -1 111 Medium 53 02 34 52 51 42 35 13 6 0 01 O
Proceedings of the United States National Museum . 0 101 do 52 03 90 00 51 42 90 00 4 J -10 102 Medium, dou-ble. 81 25 90 00 81 03 90 00 5 n -1 111 Good. 54 43 36 09 51 54 35 13 6 0 01 Oil Very poorsliim. 64 47 33 18 64 36 31 31 CRYSTAL 2. Form. Symbol. Measured Calculated. Quality de-scription. No. Letter. Gdt. Miller. f // p / P 1 t ooO 100 Multiple sig-nal. o 0 01 0 90 115 o / 0 00 0 / 90 00 2 c 0 001 Verv poor, dim 64 30 90 00 64 36 90 00 3 r -10 101 Very poor,narrow. 51 47 90 00 51 42 90 00 4 I -§o 102 Medium, poor 80 34 91 33 81 03 90 00 5 n -1 111 Medium 53 02 34 52 51 42 35 13 6 0 01 Oil Very poor,shim. 66 43 33 15 64 36 31 31 Axinite was found in two places in the quarry. North of thecentral part of the quarry face a diopside seam in a loose block ofnormal diabase had a layer from 1 mm. to 2 mm. of granular axinitein the center. This is purplish in color in the hand specimen andunder the microscope is colorless, transparent, biaxial negative (-),with 2V medium large, r<v strong ART. 2. PETROLOGY AT GOOSE CREEK SHANNON. 61. South of the central part of the quarry face an apKte dike from2 cm. cm. wide is cut by later seams filled with diopside andwhere these diopside seams widen they have a central layer of pur-plish-gray axinite. In places the axinite seams contain minute vugslined with acute wedge-shaped ax-inite cr^^stals of purplish-browncolor. The central portion of thesevugs is filled with cottony whitehornblende which contains embed-ded perfect crystals of axinite anda few long prismatic crystals of epi-dote. One such axinite-lined cav-ity was filled with a white mineralwhich, when examined microscopi-cally, was found to contain numer-ous included colorless hornblendefibers. This white mineral whichis biaxial, positive with 2V small,r>v pronounced, has a perfectcleavage perpendicular to theacute bisectrix and is doubtlessapophyllite. Its refractive index,i3 is The axinite crystal which wasmeasured was one of the perfectindividuals su
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Keywords: ., bookauthorun, bookcentury1800, bookdecade1870, booksubjectscience
