• Login
    View Item 
    •   Home
    • Journals and Magazines
    • Meteoritics & Planetary Science
    • Meteoritics & Planetary Science, Volume 43 (2008)
    • Meteoritics & Planetary Science, Volume 43, Number 12 (2008)
    • View Item
    •   Home
    • Journals and Magazines
    • Meteoritics & Planetary Science
    • Meteoritics & Planetary Science, Volume 43 (2008)
    • Meteoritics & Planetary Science, Volume 43, Number 12 (2008)
    • View Item
    JavaScript is disabled for your browser. Some features of this site may not work without it.

    Browse

    All of UA Campus RepositoryCommunitiesTitleAuthorsIssue DateSubmit DateSubjectsPublisherJournalThis CollectionTitleAuthorsIssue DateSubmit DateSubjectsPublisherJournal

    My Account

    LoginRegister

    About

    AboutUA Faculty PublicationsUA DissertationsUA Master's ThesesUA Honors ThesesUA PressUA YearbooksUA CatalogsUA Libraries

    Statistics

    Most Popular ItemsStatistics by CountryMost Popular Authors

    The Dakhleh Glass: Product of an impact airburst or cratering event in the Western Desert of Egypt?

    • CSV
    • RefMan
    • EndNote
    • BibTex
    • RefWorks
    Thumbnail
    Name:
    15669-18022-1-PB.pdf
    Size:
    7.739Mb
    Format:
    PDF
    Download
    Author
    Osinski, G. R.
    Kieniewicz, J.
    Smith, J. R.
    Boslough, M. B. E.
    Eccleston, M.
    Schwarcz, H. P.
    Kleindienst, M. R.
    Haldemann, A. F. C.
    Churcher, C. S.
    Issue Date
    2008-01-01
    Keywords
    impact cratering
    impact processes
    Clinopyroxene
    impact glasses
    
    Metadata
    Show full item record
    Citation
    Osinski, G. R., Kieniewicz, J., Smith, J. R., Boslough, M. B. E., Eccleston, M., Schwarcz, H. P., ... & Churcher, C. S. (2008). The Dakhleh Glass: Product of an impact airburst or cratering event in the Western Desert of Egypt?. Meteoritics & Planetary Science, 43(12), 2089-2107.
    Publisher
    The Meteoritical Society
    Journal
    Meteoritics & Planetary Science
    URI
    http://hdl.handle.net/10150/656510
    DOI
    10.1111/j.1945-5100.2008.tb00663.x
    Additional Links
    https://meteoritical.org/
    Abstract
    Impact cratering is a ubiquitous geological process on the terrestrial planets. Meteorite impact craters are the most visible product of impact events, but there is a growing recognition that large aerial bursts or airbursts should occur relatively frequently throughout geological time. In this contribution, we report on an unusual impact glass--the Dakhleh Glass (DG)--which is distributed over an area of ~400 km^2 of the Dakhleh Oasis, Egypt. This region preserves a rich history of habitation stretching back to over 400,000 years before the emergence of Homo sapiens. We report on observations made during recent fieldwork and subsequent analytical analyses that strengthen previous suggestions that the DG formed during an impact event. The wide distribution and large size of DG specimens (up to ~50 cm across), the chemistry (e.g., CaO and Al2O3 contents up to ~25 and ~18 wt%, respectively), the presence of lechatelierite and burnt sediments, and the inclusion of clasts and spherules in the DG is inconsistent with known terrestrial processes of glass formation. The age and other textural characteristics rule out a human origin. Instead, we draw upon recent numerical modeling of airbursts to suggest that the properties of DG, coupled with the absence of a confirmed crater, can best be explained by melting of surficial sediments as a result of a large airburst event. We suggest that glass produced by such events should, therefore, be more common in the rock record than impact craters, assuming that the glass formed in a suitable preserving environment.
    Type
    Article
    text
    Language
    en
    ISSN
    1945-5100
    ae974a485f413a2113503eed53cd6c53
    10.1111/j.1945-5100.2008.tb00663.x
    Scopus Count
    Collections
    Meteoritics & Planetary Science, Volume 43, Number 12 (2008)

    entitlement

     
    The University of Arizona Libraries | 1510 E. University Blvd. | Tucson, AZ 85721-0055
    Tel 520-621-6442 | repository@u.library.arizona.edu
    DSpace software copyright © 2002-2017  DuraSpace
    Quick Guide | Contact Us | Send Feedback
    Open Repository is a service operated by 
    Atmire NV
     

    Export search results

    The export option will allow you to export the current search results of the entered query to a file. Different formats are available for download. To export the items, click on the button corresponding with the preferred download format.

    By default, clicking on the export buttons will result in a download of the allowed maximum amount of items.

    To select a subset of the search results, click "Selective Export" button and make a selection of the items you want to export. The amount of items that can be exported at once is similarly restricted as the full export.

    After making a selection, click one of the export format buttons. The amount of items that will be exported is indicated in the bubble next to export format.