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Fracture study of the Paleozoic bedrock in a portion of east-central IndianaPentecost, David C. 03 June 2011 (has links)
Regional fracture patterns were determined from 2,419 fracture measurements collected from 11 quarries in a portion of East-Central Indiana. When the entire study area was considered, three orthogonal fracture systems were evident. The master system appeared at every station andhad fracture sets striking from N17W to N6W and N85E to N68E. The secondary systems were more inconsistent in respect to their appearance from quarry to quarry and had fracture sets striking approximately N45W and N48E, and N75W and N20E, respectively. The fractures were vertical or nearly so and were interpreted as being extensional in nature.The regional fracture patterns became apparent after data from several quarry walls, including fractures of varying persistence and intensity, were considered in combined plots for each data collection site.Suggested major mechanisms of fracturing include: 1) warping of the Cincinnati Arch, 2) the propagation of pre-existing joints in the basement rock upward into younger material, 3) the release of older residual stresses by the production of positive structural relief with associated erosional unloading, and 4) recent compressive stresses caused by the same mechanism that drives sea-floor spreading.Ball State UniversityMuncie, IN 47306
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Fracturing events in the Ruby Star granodiorite adjacent to the Esperanza prophyry copper desposit, Pima County, ArizonaManske, Scott Lee January 1980 (has links)
No description available.
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Attenuation in igneous rocks at seismic frequenciesCooper, Herman William January 1979 (has links)
Thesis (Ph.D.)--Massachusetts Institute of Technology, Dept. of Earth and Planetary Sciences, 1979. / Microfiche copy available in Archives and Science. / Bibliography: leaves 118-124. / by Herman William Cooper. / Ph.D.
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Experimental study of seismic scattering by a penny-shaped crackScheimer, James Francis January 1979 (has links)
Thesis (Ph.D.)--Massachusetts Institute of Technology, Dept. of Earth and Planetary Sciences, 1979. / Bibliography: leaves 146-150. / by James Francis Scheimer. / Ph.D.
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The relationship of cleavage in carbonate rocks to folding and faulting near Agua Verde Wash, Arizona: implications of volume lossCrespi, Jean Marie January 1982 (has links)
No description available.
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