Bulletin - United States Geological Survey, Issue 589

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Page 61 - Wolff2 described an amphibolite dike near Mount Holly, southeast of Rutland, which is in quartzite. GENERAL SCIENTIFIC SIGNIFICANCE OF THE DATA. Perhaps the most important scientific feature of these deposits is the prevalence of a coarse-textured manganese-bearing rose-colored calcite marble, alternating in very small beds with equally small beds of fine-textured white dolomite. In thin sections the demarkation between the calcite and dolomite is usually sharp. The small percentage (0.23-0.49) of...
Page 64 - To similar reactions should be attributed the presence of "mountain leather," or felty asbestos, in bedding and joints of the dolomite and marble of Swanton and Ira; * also the rim of scapolite and garnet surrounding a large oval autoclastic block of hornblende granite gneiss within the pre-Cambrian calcite marble of Flat Rock, near Fort Ann, in Washington County, NY, visited by the writer with James F. Kemp, in 1899.2 Of scientific interest is the occurrence of a 10-foot lens, mostly of secondary...
Page 60 - Townshend (p. 250) and in the diopside schist that is interfolded with the marble of Athens also points to the great age of the marble of those places. The relation of the gneiss associated with the marble in the northern part of Cavendish has been shown by Daly.1 If the interfolding took place prior to the deposition of the Cambrian beds the interfolded marbles are also of preCambrian age, but if the interfolding was due to a crustal movement that occurred at the close of Ordovician time then the...
Page 24 - ... Edgerton (Fuller) farm, in Mount Holly Township (p. 21). PLYMOUTH. The marbles of Plymouth are dolomite and dolomite breccia, occurring either as lenses in a very quartzose mica schist formation or associated with and gradually passing into an underlying quartzite. On the west side of Lake Amherst, a little west of the dolomite, are conspicuous ledges of quartzite or conglomerate with small elongated quartz pebbles. The strike of these ledges is north and the dip east. The principal outcrops...
Page 38 - XXXUI, 74, a) consists of twinned grains with diameters of 0.05 to 0.5, mostly 0.12 to 0.25 millimeter, and is thus of grade 2 (very fine). At the west bank of West River, along the strike, this dolomite crops out again for a length of 60 feet with uncertain structure and in contact on the west with a mass of contorted gneiss. The dolomite here contains a few beds up to 1 J inches thick of pink calcite marble.
Page 34 - ATHENS. Marble occurs in the western part of Athens Township, just north of the west-northwesterly part of the Townshend line, on the east side of the road from Townshend to Athens, on what was formerly the Bemis farm but is now the Guilds farm (locality 42, fig. 5). Here are several old openings and the remains of a kiln.1 i See Hitchcock, CH, and flager, A.
Page 49 - River in 1888, marble is exposed on the east side of the track for over 100 feet, the beds striking N. 10-22 W. and dipping on the average 45 N. 75 E. Parallel to the bedding at irregular intervals are five schistose beds, 1 foot, 1 foot 6 inches, 2 feet, 2 feet 6 inches, and 3 feet thick, respectively. The widest space of clear marble between them is 88 feet, amounting to 62 feet measured vertically to the dip. The schistose beds are made up of a bronze-colored micaceous plicated amphibolite,...
Page 11 - CuFeS,), a sulphide of copper and iron containing about 34 per cent of copper, occurs in small particles, in joint and bedding planes, and in some joints crystallized with quartz (specimen D, XXXIV, 86, f). In some beds it is altered to malachite, coloring the marble bright green in narrow streaks (specimens 86, j, 1). The geologic processes which have taken place at this locality thus appear to include the deposition of marine clayey sediment, either before or after the organic deposition of calcium...
Page 19 - These outcrops are described by Richardson, op. cit., vol. 3, p. 87, 1902. * Idem, pp. 69, 70. County. The locality is about 750 feet above the river, nearly due west of a bridge over it, on the DG Marsh farm. The dolomite is 25 feet thick, strikes N. 67 E., dips 80 S. 23 E., and is overlain, on the south, by a fine-grained banded muscovite granite gneiss (specimens D, XXXIV, 70, c, d).
Page 6 - RICHARDSON, CH, The terranes of Orange County, Vt.: State Geologist Vermont Rept., vol. 3, pp. 61-101, 1902. RICHARDSON, 0. H., "Washington limestone," The areal and economic geology of northeastern Vermont: Idem, vol.

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