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The Appalachian fold and thrust belt, northwestern Newfoundland /Grenier, Robert, January 1990 (has links)
Thesis (M.Sc.) -- Memorial University of Newfoundland. / Typescript. Bibliography: leaves 137-147. Also available online.
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Can growth strata identify individual paleoearthquakes and characterize fold kinematics? : a case study from the La Laja fault system, Sierra de Villicum, Argentina /Schultz, Emily S. January 1900 (has links)
Thesis (M.S.)--Oregon State University, 2007. / Printout. Includes bibliographical references (leaves 67-71). Also available on the World Wide Web.
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The Origin of the faults, anticlines, and buried "granite ridge" of the northern part of the mid-continent oil and gas field ... /Fath, Arthur Earl, January 1900 (has links)
Thesis (Ph. D.)--University of Chicago, 1922. / "A Dissertation, submitted to the Faculty of the Ogden Graduate School of Science in candidacy for the Degree of Doctor of Philosophy, Department of Geology." "Private edition, distributed by the University of Chicago Libraries, Chicago, Illinois." "Reprinted from U.S. Geological survey, Professional paper 128 ... 1920." Includes bibliographical references.
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An investigation of strain patterns and mesoscopic structures associated with ramp-induced foldsBajak, Doris M. January 1983 (has links)
Experimental, plane strain deformations of plasticene and clay multilayers containing pre-cut ramps, have generated broad, flattopped to narrow, rounded fold geometries. Initial boundary conditions, including lubrication, end effects, and the ratio of mechanical unit to overburden rigidity determine proportions of translation and amplification which operate during the development of three main and two hybrid fold forms. Each fold geometry exhibits a unique strain pattern, but generally shows highest strains on overturned limbs, and above ramp regions. Lowest strains occur in footwall layers and between ramps. During folding, strain is produced by combinations of bending, rotation, flexural slip, and flexural flow. Layer parallel shortening strain transpires primarily before fold formation above ramps. Fold forms are dictated by the sequence of mechanisms, and proportional changes in strain mechanism magnitudes. Flexural slip predominates in flat-topped forms, while flexural flow prevails in rounded forms. Bending strain is minor in all geometries. Ellipse long-axis orientations define cleavage patterns which are more complex than proposed theoretical patterns due to variations in analogue lubrication and layer anisotropy. Analogue strain patterns may have potential for use in delineating subsurface folds and their history of development.
An investigation of strain and mesoscopic structure was undertaken in the Burkes Garden dome, located in the Narrows thrust sheet in southwest Virginia to delineate the dome's history of formation. The Burkes Garden dome is a broad, flat-topped structure containing two mesoscopifold sets trending N55E and N62W, subregional (N50E) and local (outlines dome shape) cleavage orientations, northwest and southeast dipping faults, and northwest and southeast verging folds. Strain values ( R = 1.1 - 1.5) are low and show little variance in the dome. Regional and mesoscopic structure, and strain values suggest dome development results from duplex formation in the Cambro-Ordovician dolomite/limestone package below the overlying Narrows thrust sheet. Duplex formation can be continued down strike by varying the number of horses and stable ramp position. Differential amounts of movement along the Saltville fault and/or lateral ramps at depth may have produced weak localized strike-parallel compression, resulting in northwest trending folds, and local cleavage orientations. Sheet lock-up probably occurred late during dome development producing northwest dipping faults, and southeast verging folds. / M.S.
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Geology and kinematic analysis of deformation in the Redington Pass area, Pima County, ArizonaSchloderer, John Peter, 1948- January 1974 (has links)
No description available.
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Structure of the Cape Fold Belt in the Ceres SyntaxisDe Beer, C. H 12 1900 (has links)
Thesis (MSc)--Stellenbosch University, 1989. / ENGLISH ABSTRACT: The Ceres Syntaxis comprises that part of the Cape Fold Belt
Syntaxis that lies north of the Worcester Fault. Most of the
area consists of folded Cape Supergroup (primarily Witteberg
Group) rocks. Fold styles of all fold trends are essentially
the same. However, different multilayer rheologies led to the
development of either sinusoidal or kink-like fold geometries
in different parts of the cover sequence. The character of
Witteberg sediments led to the development of large megakink
folds and peculiar fold zones in this part of the sequence.
Fold trends in the Ceres Syntaxis vary between NW-SE, NE-SW
and E-W. The southern part of the area is dominated by the
NE-SW trend, with the NW-SE trend being only important in the
west. Interference between these two trends only exists in
the Witteberg Group, where it occurs as crossing linear fold
zones and conjugate, intersecting kink folds . Cross-folding
relationships in the north-eastern part of the Ceres Syntaxis
indicate that the area had been affected by two
contemporaneous, orthogonally opposed compressions that worked
simultaneously in different parts of the multilayer.
Differences in the magnitude of strain, or in the local timing
of fold initiation, produced local refolding or transecting
relationships. The microfabric of Witteberg sandstones
suggests deformation under conditions of low temperature and
pressure, as well as low strain rates. Some microfabrics also
indicate that substantial buckle shortening occurred while the
Middle and Upper Witteberg beds were still unlithified.
Isotopic dating of Cedarberg shale from both main trends did
not yield unequivocal results, mainly due to the
deformatio~al intensity. The positioning of the Cape
low
Fold
Belt Syntaxis was strongly influenced by basement tectonic
grain and basin floor relief. The NW and NE fold trends
formed on a heterogeneous basement that resolved the
stress configuration into components which
external .
acted
simultaneously towards the north-west and north-east. Ecca
and Beaufort Group sedimentation patterns in the western Karoo
corroborate the above findings. / AFRIKAANSE OPSOMMING: Die Ceres-sintaks beslaan daardie deel van die sintaks van die
Kaapse Plooigordel wat noord van die Worcesterverskuiwing Ie.
Die gebied bestaan grotendeels uit geplooide gesteentes van
die Supergroep Kaap (hoofsaaklik Groep Witteberg). AIle
plooirigtings openbaar dieselfde plooistyl. Reologiese
verskille in'die rnultilaehet egter gelei tot die ontwikkeling
van of sinusoidale ~f knikvorrnigeplooie in verskillende dele
van die dekgesteentes. Die Wittebergsedirnente se aard het
veroorsaak dat rnegaknikkeen eienaardige plooisones in hierdie
deel van die opeenvolging ontstaan het. Plooirigtings in die
Ceres-sintaks wissel tussen NW-SO, NO-SW en O-W. Die NO-SW
plooirigting oorheers in die suidelike deel van die gebied,
terwyl die NW-SO plooirigting eintlik net in. die weste
belangrik is. Interferensie van hierdie twee.hoofrigtings korn
slegs voor in die Groep Witteberg, waar dit as dwarssnydende
lineere plooisones en snydende, konjugerende knikke aanwesig
is. Onderlinge verhoudings tussen kruisplooie in die
noordoostelike Ceres-sintaks, toon dat die gebied beinvloed is
deur twee gelyktydige drukspannings wat reghoekig op rnekaar
ingewerk het, sorntyds in effens verskillende dele van die
rnultilaag.Verskille in die spanningsbedrag en tydsberekening
het lokale herplooiing of dwarssnydende strukture veroorsaak.
Die mikrornaaksel van die Wittebergsandsteen toon dat die
vervorming onder lae temperatuur- en druktoestande, tesame met
'n lae vervorrningsternpo, plaasgevind het. Die rnaaksel toon
ook aan dat heelwat buigplooiing plaasgevind het terwyl die
Middel- en Bo-Witteberglae nog ongekonsolideer was. Isotopiese
datering van Sederbergskalie afkornstigvan die twee hoofplooirigtings,
het weens die lae vervormingsintensiteit swak
resultate gelewer. Die posisie van die sintaks van die Kaapse
Plooigordel, insluitende die van die Ceres-sintaks, is sterk'
belnvioed deur die tektoniese grein en re~i~f van die
vloergesteentes. Die heterogene vloer waarop die NW en NO
plooie gevorrn het, het daartoe gelei dat die eksterne
spanningsopset verdeel is in kornponentewat gelyktydig na die
noordweste en noordooste gewerk het. Sedirnentasiepatrone in
die Groepe Ecca en Beaufort ondersteun bostaande afleidings.
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Metamorphism and folding in the Mt. Lofty Ranges, South Australia, with particular reference to the Dawesley-Kanmantoo areaFleming, Peter David January 1971 (has links)
2 v. : ill. / Title page, contents and abstract only. The complete thesis in print form is available from the University Library. / Thesis (Ph.D.)--University of Adelaide, Dept. of Geology and Minerology, 1972
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The Grenville front foreland fold-and-thrust belt in southwestern Labrador : mid-crustal structural and metamorphic configuration of a Proterozoic Orogenic thrust wedge /Van Gool, Jeroen Antonius Maria, January 1992 (has links)
Thesis (Ph.D.)--Memorial University of Newfoundland, 1993. / Bibliography: leaves 288-303. Also available online.
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Three investigations of accretionary wedge deformationBreen, Nancy Ann. January 1987 (has links)
Thesis (Ph. D.)--University of California, Santa Cruz, 1987. / Typescript. "These papers describe faulting and folding observed on the seafloor using SeaMARC II side-scan sonar, seismic reflection, and 3.5 kHz data"--P. 1. Includes bibliographical references.
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Numerical modeling of fracturing in non-cylindrical folds case studies in fracture prediction using structural restoration /Shackleton, John Ryan, January 2009 (has links)
Thesis (Ph. D.)--University of Massachusetts Amherst, 2009. / Open access. Includes bibliographical references (p. 137-144). Print copy also available.
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