Report of the Geological Survey of the State of New HampshireOrren C. Moore, State printer, 1869 |
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9 Cir Ammonoosuc andalusite ascent BAROMETER beds brook C. H. HITCHCOCK Carrigain chrysolite clay slate Clouds on mt Concord Connecticut River Coos group copper Dartmouth College Day of Month Dense clouds Depot east excavation feet wide feldspar felsites formations Franconia Geological Survey Geologist gneiss gold Grafton granite Hampshire Hill hundred feet inch iron J. H. Huntington Jackson Kiarsarge Kind labradorite Lake ledges Light clouds limestone Lunenb'g Hanover Lunenburg mass mica schist miles mineral Mount Washington nearly norian Notch observations orthoclase P. M. Gorham P. M. Hanover P. M. Lunenburg P. M. Mt peak Pemigewasset Pond porphyritic porphyritic gneiss present Prof Professor pyrites quartz quartzite Railroad Rain range road rock Saco River schist specimens staurolite storm strata summit syenitic tain tion trachytic trachytic granite Tripyramid valley vein Village Washing Waterville White Mountain wind winter ZZZZZ
مقاطع مشهورة
الصفحة 20 - Above the Notch, as far as the " Elbow," there is a recurrence of the finer-grained syenite, containing geodes and feldspathic veins. At the Elbow there is a somewhat different mineral combination, extending to the top of the Pyramid. Quartz is rare, but there are two kinds of feldspar. Mica is abundant, and some specimens show hornblende. The same minerals occur in the geodic masses, as below ; also actinolite, amethyst, and others yet undetermined.
الصفحة 18 - Connecticut rivers, in order to discover their altitudes as well as their geological character. Next he resumed the examination of the rocks of Coos county. Afterwards he joined our party in the White Mountains, as before mentioned. Later in the season he made further examinations in Coos and in Bean•s Purchase. Later in the fall he devoted himself to the interests of the Mount Washington Meteorological Expedition, attending to the completion of the arrangements for occupying the railroad depot...
الصفحة 54 - The condition of the gold shows it to have been for the greater part, at least, detached, rounded and ground by erosive action of currents of water." In the town of Ditton whieh borders on New Hampshire and is immediately north of the head waters of Indian stream, alluvial gold washing, by sluicing, has been carried on for several years. The place where the most extensive operations are, is on a branch of Salmon river, three and a half miles from the boundary.
الصفحة 7 - Only a rough abstract of its doings can now be presented, although an immense amount of detail has accumulated for description. THE WHITE MOUNTAINS. The most laborious field of research, the past year, has been the White Mountains, particularly the region about thirty miles long and twelve or fifteen wide, bounded by Israel's, Moose, Peabody, Ellis and Saco rivers. This area is nearly an unbroken forest, traversed only by the bridle paths and roads required for the ascent of Mount Washington by summer...
الصفحة 50 - ... north and south direction. The second opening, two hundred feet lower down the slope of the hill, exposes the ore, maintaining the same width. Three hundred feet lower down the vein is observed to narrow, and is but ten feet wide, and four hundred feet farther down the width increases to fifty-five feet.
الصفحة 16 - ... an interesting excavation in the form of a notch, where one side is long, sloping gradually, and the other steep and short. Half way down the stream — which may appropriately be termed Norway Brook on account of the name of the formations traversed by it — the water falls precipitately over a ledge of the dark norite rock.
الصفحة 49 - Jackson, and is thus described by him : "One of the veins at the upper opening measures thirty-seven feet in width in an east and west and sixteen in a north and south direction. The second opening two hundred feet lower down the slope of the hill exposes the ore, maintaining the same width. Three hundred feet lower down the vein is observed to narrow and is but ten feet wide, and four hundred feet...
الصفحة 50 - ... dimensions. * * * Forty-nine feet farther westward the soil is full of angular fragments of the ore, indicating another vein. It is evident that this mountain is intersected by a great number of veins of excellent iron ore, and will furnish an inexhaustible supply. It is proper here to remark, that it is composed chiefly of the peroxide of iron, combined with a small proportion of the protoxide, and it contains a little oxide of manganese. From the composition of the ore we know that it will...
الصفحة 20 - ... drift. Similar ledges occur for a mile, some exposures being sixty or seventy feet long. The rock seems to be stratified, the planes dipping about twenty degrees northerly. This dark rock is abruptly succeeded by a gray syenite-appearing rock, being sometimes labradorite and mica, with hornblende; then orthoclase, labradorite, and mica, with scarcely any hornblende. The line of junction is irregular, averaging north 20° east, and cutting the strata. Cavities in the strata have been filled by...