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: Paleoecology of the Alamogordo Member of the Lower Mississippian (Kinderhookian-Osagean) Lake Valley Formation, New Mexico
  name:
    name part: Jeffery, David LLoyd
    name part: 1967-
    role:
      role term: creator
  type of resource: text
  genre: bibliography
  origin info:
    place:
      place term: xx
    date issued: 1996
    issuance: monographic
  language:
    language term: eng
  physical description:
    form: print
    extent: xiii, 189 leaves : illustrations, maps ; 28 cm.
  abstract: Exposure of the Alamogordo Member of the Lake Valley Formation provides an opportunity to study ramp-mudmound paleoecology in terms of temporal and spatial changes of environmental parameters. The Member consists of 14 beds and bed sets traceable for the entire transect on the Sacramento Mountains western escarpment. The unit thins southward from 10.5m to 1.5m. The ramp is estimated to have dipped southward at 0.50 based on fossil algae distribution. The retrogradational and subsequent progradation of depth- sensitive biotic assemblages indicates accommodation increased during early deposition, and decreased during later deposition. Mounds occur in the northern 2/3 of the ramp transect in the deeper part of the photic zone. Mounds range from broad composites of laterally back-stepping subunits in shallower areas to taller, vertically stacked composites down-ramp. Mound growth and form is described in terms of several primary controlling parameters -- submarine topography, water circulation, light penetration, and accommodation fluctuations. Episodic mound growth is documented by diastems bounding mound stratal units. Mounds in shallower ramp areas grew on the margins of a broad, intra-ramp, topographic high, defined previously from facies and isopach trends in enclosing strata. Margins and irregular topography of the high are reflected by mound distribution, growth geometries, facies patterns, and facies and thickness trends of enclosing strata. Siting of mounds was controlled by local topography on and along the margins of the intra-ramp high. Mound growth began along the margin and retrograded onto the intra-ramp high, then prograded basinward. The lesser height and pronounced backstepping of shallower ramp mounds, in contrast to mounds that grew more ertically down ramp suggest that growth and overall morphology were controlled by accommodation. A new species of microproblematica occurs in a cryptic environment within the skeleton of the squamulate tabulate coral…
  note: by David Lloyd Jeffrey.
  note: Vita.
  note: "Major Subject: Geology".
  note: Issued also on microfiche from University Microfilms Inc.
  note: Includes bibliographical references: pages 133-149.
  note: Ph. D. Texas A&M University 1996.
  subject:
    topic: Major geology
  identifier: 97-01658 UMI
  identifier: http://proxy.library.tamu.edu/login
  related item:
    location:
      url: http://proxy.library.tamu.edu/login
  record info:
    record content source: TXA
    record creation date: 970506
    record change date: 20190325093256.0
    record identifier: in00001353265