Geology of the Pegmatites and Associated Rocks of Maine Including Feldspar, Quartz, Mica, and Gem Deposits (Classic Reprint)

Page. Plate I. Map of southern and eastern Maine, showing distribution of granites and allied rocks and locations of developed pegmatite deposits In pocket. II. Microphotograph of fine-grained pegmatite from Lewiston 10 III. At Highly inclined dike of pegmatite on schists atP emaquid Point; Bt Flatrlying or sill-like dike in pegmatite in bed of Androscoggin River, A ubum-L ewiston 10 ly. A fI njection gneiss, McM ahon I sland; B, Injection gneiss, Geoigetown 10 y. A fL enses of quartz diorite in porphyritic granite, St. Geoige River; B, Flow gneiss, same locality 12 yi. Zone of strain, fracture, and recrystallization in rose quartz from Norway 18 VII. Graphic intergrowth of microcline and quartz, Auburn 22 VIII. Photomicrograph of graphic granite from Topsham 24 IX. A, Muscovite-rich zones in pegmatite, Topsham; B, Pocket in pegmatite. Mount Mica 26 X. A fD eflection of schist folia near pmatite, Paris; B, Development of feldspar crystals in schist near pegmatite, Rumford Falls 34 XI. General view of Mount Mica tourmaline mine 82 XII. Early workings atM ount Mica 84 XIII. Largest pocket in pegmatite atM ount Mica 86 XIV. Largest crystal of tourmaline ever found atM ount Mica 88 XV. Large single tourmaline fromM ount Mica 90 XVI. Ay Diabase dike network, Stoneham; B, Quartz dike in pegmatite, South Glastonbury, Conn 98 XVII. Microphotograph of thin section of feldspar from Golding sS ons quarry, Georgetown 120 XVIII. Intergrowths of feldspar and quartz 124 XIX. Muscovite from Topsham, showing wedge structure 138 Figure 1. Pinch and swell structure in pegmatite dike 11 2. Gradation of granite into pegmatite, Boothbay Harbor 14 3. Quartz offshoot from pegmatite, Paris 19 4. Fluidal cavities in pegmatitic quartz 20 5. Diagram showing composition of graphic granite 40 6. Relations of pegmatite and wall rock at Hibbs feldH par and mica mine, Hebron 73 7. Fluidal c
(Typographical errors above are due to OCR software and don't occur in the book.)