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: Soil characteristics and genesis of carbonates in the Rolling Plains of Texas
  name:
    name part: Drees, Larry Richard
    name part: 1941-
    role:
      role term: creator
  name:
    name part: Wilding, L. P.
    role:
      role term: degree supervisor.
  name:
    name part: Allen, B. L.
    role:
      role term: degree committee member.
  name:
    name part: Hallmark, C. T.
    role:
      role term: degree committee member.
  name:
    name part: Loeppert, R. H.
    role:
      role term: degree committee member.
  name:
    name part: Rezak, R.
    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: 1986
    issuance: monographic
  language:
    language term: eng
  physical description:
    form: print
    extent: xiv, 240 leaves : illustrations ; 29 cm
  abstract: The Rolling Plains covers about 10 million hectares in the northwestern portion of Texas. Soils within the region have ustic soil moisture regimes and thermic temperature regimes. A total of 13 pedons were studied; nine were satellite pedons, and four from a hillslope site near Haskell, Texas representing stable and erosional landforms. Stable landscape positions have argillic horizons, completely to partially leached of carbonates, while less stable erosional sites have cambic horizons and carbonates to the surface. Detailed analyses herein are from Argiustolls, Paleustolls and Ustochrepts of the hillslope sequence. Objectives of this work were to differentiate pedogenic from lithogenic carbonate forms, their distribution, and probable source of carbonate minerals relative to the soils and underlying stratigraphic units. The red loam to clay loam soils are vertically stratified and overlie gray sandstone and red bed shales respectively. These three major stratigraphic units were identified by particle-size distribution, elemental assay and micromorphic analyses. Quartz overgrowths, identified by SEM, occurred throughout the upper two stratigraphic units, but authigenic kaolinite was observed only in the sandstone unit. These two features are considered to be early post-depositional diagenic products Macromorphic forms of pedogenic carbonates are filaments, threads, and concretions; corresponding micromorphic forms are calcans, neocalcans, crystallaria and nodules. These features are good field and micromorphic evidence of contemporaneous pedogenesis involving calcite dissolution and reprecipitation. Pedogenic carbonates are calcite and occur primarily in the solum while euhedral dolomite is a lithogenic post-depositional product occurring in sandstone Cr horizons. Pedogenic calcite was precipitated 10,000 to 20,000 years B.P. as confirmed by radiocarbon dating. Dolomite is too old to date by radiocarbon methods. Stable carbon isotopic ratios for calcite (-0.9 [ppt]…
  note: Typescript (photocopy).
  note: Vita.
  note: "Major subject: Soil Science."
  note: Ph. D. Texas A & M University 1986
  note: Includes bibliographical references (leaves 172-188).
  subject:
    geographic code: n-us-tx
  subject:
    topic: Soils
    topic: Carbonate content
    geographic: Texas
  subject:
    topic: Soils
    topic: Carbonate content
  subject:
    geographic: Texas
  subject:
    topic: Major soil science
  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: 870312
    record change date: 20200904152401.0
    record identifier: in00000438593
    language of cataloging:
      language term: eng