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:
    non sort: The
    title: kinematics and mechanics of oblique ramp deformation within fold-and-thrust belts
  name:
    name part: Apotria, Theodore George
    name part: 1960-
    role:
      role term: creator
  name:
    name part: Fletcher, Raymond C.
    role:
      role term: degree committee member.
  name:
    name part: Friedman, Melvin
    role:
      role term: degree committee member.
  name:
    name part: Johnson, Brann
    role:
      role term: degree committee member.
  name:
    name part: Spang, John H.
    role:
      role term: degree supervisor.
  name:
    name part: Wiltschko, David V.
    role:
      role term: degree supervisor.
  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: xii, 193 leaves : illustrations, maps ; 29 cm
  abstract: The South Fork thrust, a hanging wall imbricate of the Absaroka thrust sheet, southwest Wyoming, has a high angle (~70°), small displacement (~900 ft.), oblique ramp in the hanging wall and footwall. Two penetrative deformation events were recorded by folding, stylolitic cleavage, and calcite twinning strains. The first, with east-directed "regional" shortening, is attributed to early layer-parallel shortening. The second event suggests northeast-directed shortening unique to the oblique ramp, nearly perpendicular to its strike. A systematic change in the orientation of bedding and fractures near the oblique ramp suggests that the hanging wall also underwent a quasi-rigid body rotation as it was pinned near its western terminus. Kinematic models for the deformation of hanging wall material moving over a footwall oblique ramp are developed by considering two end members of assumed mechanical behavior: vertical shear and layer-parallel shear. In the former case, material is sheared vertically and displacements remain within the tectonic transport plane. In the later case, material is deflected out of the transport plane. The deflection and out-of-plane shear strains are zero for frontal and lateral ramps, and maximum at an intermediate oblique orientation, depending on ramp dip. At frontal ramp-oblique ramp intersections, the deflection may cause local strike-parallel extension or shortening. Hanging wall motion over footwall topography has been modeled by solving a 3-D boundary value problem, in which the hanging wall is represented by a linear viscous half-space sliding over a low dip, frictionless, sinusoidal interface. One interface resembles a series of basins and domes, and is the locus of out-of-plane displacements, velocities, and stresses. In a second model, the basic velocity is at an oblique angle to the strike of the axis of the cylindrical interface. The maximum and minimum compressive stress and perturbed velocity field are always oriented in a plane per…
  note: by Theodore George Apotria.
  note: "Major subject: Geology."
  note: Includes 1 folded map in back pocket.
  note: Typescript (photocopy).
  note: Vita.
  note: Ph. D. Texas A & M University 1990
  note: Includes bibliographical references.
  subject:
    geographic code: n-us-wy
  subject:
    topic: Deformations (Mechanics)
  subject:
    topic: Geology, Structural
    geographic: Absaroka Range (Mont. and Wyo.)
  subject:
    topic: Thrust faults (Geology)
    geographic: Absaroka Range (Mont. and Wyo.)
  subject:
    topic: Geology
  subject:
    topic: Deformations (Mechanics)
  subject:
    topic: Geology, Structural
  subject:
    topic: Thrust faults (Geology)
  subject:
    geographic: United States
    geographic: Absaroka Range
  identifier: http://proxy.library.tamu.edu/login
  identifier: https://hdl.handle.net/1969.1/DISSERTATIONS-1204047
  related item:
    location:
      url: http://proxy.library.tamu.edu/login
  related item:
    location:
      url: https://hdl.handle.net/1969.1/DISSERTATIONS-1204047
  record info:
    record content source: TXA
    record creation date: 911203
    record change date: 20220103135010.0
    record identifier: in00001049898
    language of cataloging:
      language term: eng