Download A Different View of Stone Monuments, Memorials and Buildings by Bruce R. Doe PDF

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By Bruce R. Doe

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Published by way of the yankee Geophysical Union as a part of the Field journey Guidebooks Series.

This afternoon journey in downtown Washington, D.C., will allow examine of pollutants, structural, and different kinds of wear to buildings with emphasis on these developed of good- to coarse-grained marble yet with representatives of limestone and crimson sandstone. The journey will comprise so as of exam [date of labor initiated (i) and/or occupied (o.) and stone type]: the Renwick Museum (1859o., crimson sandstone trim changed 1987), Corcoran Museum (1879c. enlarged 1927, coarse-grained marble), crimson pass constructions (1915i.-1917o., 1927i., fine-grained marble), Memorial Continental corridor of the Daughters of the yank Revolution, DAR (1904i.-1909o., fine-grained marble), Pan American Union development (1908i.-1910o., coarse-grained marble), structure corridor (DAR) (1929o., limestone), Washington Monument (1885o., marble), Jefferson Memorial (1943o., external of fine-grained marble), and Lincoln Memorial (1922o., very fine-grained marble). Coarse-grained marble is generally extra immune to pollutants harm than fine-grained marble. Direct publicity to the weather quickens degradation. the main critical toxins harm happens to balustrades and columns: runoff from bronze onto fine-grained marble may also reason severe degradation. Any type of overhang has a tendency to guard the underlying stone, yet exceptions might be noticeable on the Jefferson Memorial. in most cases, vertical partitions have much less toxins harm than horizontal surfaces that can start to convey roughening inside of years of install. Limestone in universal use is strangely proof against degradation owing, at the least partially, to the porous nature of the stone that inhibits runoff. If one of many journeys is made to the Powell construction of the U.S. Geological Survey in Reston, Virginia (1974o., concrete), it is going to be visible that concrete behaves very like limestone and marble.

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5 m), graded bedding, cross- bedding, and small (100 x 20 ram) lenses of and• seams. Several phases of deformation are usually observed. The metamorphic grade is biotite-grade greenschist facies or hiMher. The schists are not extensively invaded by granitic veins, and there is no incipient metamorphic segreMation. The protolithologies were dominantly psammite with minor pelite, particularly in the westernmost outcrops. Impure calcereous horizons, seen as small seams (10-100 ram) or ovoid nodules (25 x 100 mm) are very minor but conspicuous.

May be regarded as an early phase of the ite Harbour Intrusives, a major plutonic of the Ross (Cambro-Ordovician) Orogeny They Granphase in northern iso- Victoria Land. The initial Sr and to the east in the Lanterman the Salamander Ranges (see Figure 1). and In this report are discussed age determinations of metamorphic rocks from the western, Daniels Range area; this study forms part of a wider program to compare the ages of the Wilson Group throughout northern Victoria Land. 0016, is high and indicative of an S type granitoid in which the sedimentary precursor is similar to psammitic type Rennick Schist, Ross fold similar mean87SR/86Srratio.

Klimov, L. , and D. S. Soloviev, Features rocks from north Victoria Land, Geol. , Reihe B, 41, 267- 1981. M. , J. D. Bradshaw, and A. Wodzicki, 1982. Plummer, C. , R. S. Babcock, J. W. Sheraton, C. J. Adams, and R. L. Oliver, Geology of the Daniels Range, northern Victoria Land, Antarctica: A preliminary report, in Antarctic Earth Science, edited by R. L. Oliver, P. R. James, and J. B. Jago, pp. 113117, Australian Academy of Science, Canber1983. M. , and A. J. Krylov, from East Antarctica, Absolute in Antarctic edited by R.

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