rdf-syntax-grammar
mods:
  schema location: http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
  title info:
    title: Models and observations of faulting and folding in layered rock
  name:
    name part: Davies, Russell King
    name part: 1958-
    role:
      role term: creator
  name:
    name part: Fletcher, Raymond C.
    role:
      role term: degree supervisor.
  name:
    name part: Johnson, Brann
    role:
      role term: degree committee member.
  name:
    name part: Logan, John
    role:
      role term: degree committee member.
  name:
    name part: Spang, John
    role:
      role term: degree committee member.
  name:
    name part: Wiltschko, David
    role:
      role term: degree committee member.
  name:
    name part: Texas A & M University
    role:
      role term: degree granting institution.
  type of resource: text
  genre: bibliography
  genre: Academic theses
  origin info:
    place:
      place term: xx
    date issued: 1990
    issuance: monographic
  language:
    language term: eng
  physical description:
    form: print
    extent: xi, 147 leaves : illustrations ; 29 cm
  abstract: To better understand the process of initiation and propagation of thrust faults in layered rock and die role of weak bed-parallel surfaces in the deformation, we mapped wedge faults (WFs) and bed-parallel faults and described their interactions in an outcrop of interbedded sandstones and shales. In the present study, the term WF denotes a thrust fault that cuts a single bed. The slip on one set of WFs is conjugate to die inferred slip on bed-parallel faults and to that on an opposite dipping set of WFs. The rock is strongly deformed at the intersection of two WFs and a WF and a bed-parallel fault. The direction of maximum compression determined from the fault orientation and for a Mohr-Coulomb failure criterion is 1.5° counterclockwise to bedding. The WFs occur in an echelon array across bedding forming thrust fault zones. In single layers, a set of regularly-spaced WFs with a common dip form small duplexes. Dominance of bed-parallel shortening over bed-parallel sliding explains the particular WF configurations. A model that simulates the development of regularly-spaced faults in single layers is an embedded plastic layer which is subjected to combined layer-parallel shortening and shear. The layer is separated from a rigid substrate by an interface along which slip is permitted. The strength of a thin interlayer between the layer and an overlying viscous half space determines the amount of slip permitted there. A perturbation in the form of widely-spaced open cusps in the shape of the upper interface perturbs the flow in the layer. Shear bands extend from the cusps to the lower interface where they reflect upwards. The shear bands are kinematically similar to faults. If the interlayer is weak, the shear bands reflect at the interfaces along the length of the layer. If the interlayer is strong the shear bands stop at the broadly folded upper surface. In layer-parallel shortening the shear bands are symmetric. Superposing a component of shear on the layer interface r…
  note: "Major subject: Geology."
  note: Typescript (photocopy).
  note: Vita.
  note: Ph. D. Texas A & M University 1990
  note: Includes bibliographical references.
  subject:
    topic: Folds (Geology)
    topic: Models
  subject:
    topic: Major geology
  identifier: http://proxy.library.tamu.edu/login
  identifier: https://hdl.handle.net/1969.1/DISSERTATIONS-1118147
  identifier: http://gateway.proquest.com/openurl
  related item:
    location:
      url: http://proxy.library.tamu.edu/login
  related item:
    location:
      url: https://hdl.handle.net/1969.1/DISSERTATIONS-1118147
  related item:
    location:
      url: http://gateway.proquest.com/openurl
  record info:
    record content source: TXA
    record creation date: 910312
    record change date: 20220103134820.0
    record identifier: in00000990036
    language of cataloging:
      language term: eng