KUKU

KU ScholarWorks

  • myKU
  • Email
  • Enroll & Pay
  • KU Directory
    • Login
    View Item 
    •   KU ScholarWorks
    • Dissertations and Theses
    • Theses
    • View Item
    •   KU ScholarWorks
    • Dissertations and Theses
    • Theses
    • View Item
    JavaScript is disabled for your browser. Some features of this site may not work without it.

    Surface Rock Controls on the Development of Desert Varnish in the Mojave Desert

    Thumbnail
    View/Open
    Zautner_ku_0099M_14871_DATA_1.pdf (9.319Mb)
    Issue Date
    2016-08-31
    Author
    Zautner, Eric
    Publisher
    University of Kansas
    Format
    39 pages
    Type
    Thesis
    Degree Level
    M.S.
    Discipline
    Geography
    Rights
    Copyright held by the author.
    Metadata
    Show full item record
    Abstract
    Desert varnish is a commonly occurring feature on surface rocks of stable landforms in arid regions. The objectives of this study were to investigate how desert varnish is related to the properties of the rocks on which it forms and how varnish is related to landform surface age and stability. To accomplish these objectives, approximately 350 varnished rocks from previously dated sites in the Mojave Desert were collected, photographed, converted to 3-D models, and analyzed to determine the extent, intensity, and patterns of desert varnish and how the desert varnish was related to land surface age and stability. Our results show a link between increasingly stronger varnish expression and both landform age and stability. We found a potential interaction between vesicular (V) horizons and the formation of the rubified ventral varnish. The rocks in this study showed a maximum varnish expression at a depth below the embedding plane that corresponded to the depth of V horizons when present and the lowest portion of the rock when absent. When V horizons were present, the varnish tended to be strongest near the lower boundary of these horizons. This interaction between the V horizons and location of maximum varnish expression on the rock may be due to the effect of V horizons on infiltration and the retention of water at those depths. The relationship between ventral rubification, rock size, and age shown in this study suggest that stable land surface environments (i.e., stable landforms and large surface rocks) create conditions needed for strongly expressed varnish. In the absence of traditional dating techniques, these relationships could be used to estimate the ages of Mojave Desert landforms.
    URI
    http://hdl.handle.net/1808/22381
    Collections
    • Geography & Atmospheric Science Dissertations and Theses [184]
    • Theses [3827]

    Items in KU ScholarWorks are protected by copyright, with all rights reserved, unless otherwise indicated.


    We want to hear from you! Please share your stories about how Open Access to this item benefits YOU.


    Contact KU ScholarWorks
    785-864-8983
    KU Libraries
    1425 Jayhawk Blvd
    Lawrence, KS 66045
    785-864-8983

    KU Libraries
    1425 Jayhawk Blvd
    Lawrence, KS 66045
    Image Credits
     

     

    Browse

    All of KU ScholarWorksCommunities & CollectionsThis Collection

    My Account

    LoginRegister

    Statistics

    View Usage Statistics

    Contact KU ScholarWorks
    785-864-8983
    KU Libraries
    1425 Jayhawk Blvd
    Lawrence, KS 66045
    785-864-8983

    KU Libraries
    1425 Jayhawk Blvd
    Lawrence, KS 66045
    Image Credits
     

     

    The University of Kansas
      Contact KU ScholarWorks
    Lawrence, KS | Maps
     
    • Academics
    • Admission
    • Alumni
    • Athletics
    • Campuses
    • Giving
    • Jobs

    The University of Kansas prohibits discrimination on the basis of race, color, ethnicity, religion, sex, national origin, age, ancestry, disability, status as a veteran, sexual orientation, marital status, parental status, gender identity, gender expression and genetic information in the University’s programs and activities. The following person has been designated to handle inquiries regarding the non-discrimination policies: Director of the Office of Institutional Opportunity and Access, IOA@ku.edu, 1246 W. Campus Road, Room 153A, Lawrence, KS, 66045, (785)864-6414, 711 TTY.

     Contact KU
    Lawrence, KS | Maps