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    The Texas mud blanket: Understanding fine-grained sediment flux in the NW Gulf of Mexico during the previous transgression

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    Author
    Weight, Robert William Reed
    Date
    2010
    Advisor
    Anderson, John B.
    Degree
    Master of Science
    Abstract
    The evolution and source of the Texas Mud Blanket (300 km3) was determined from 26 new radiocarbon dates and from ∼3000 km of 2D seismic data. Sediment flux (km3/ka) was calculated from this combined dataset. XRD reveals its origins are mostly from the Colorado and Brazos Rivers. Between LGM and 17 ka, sediments filled the deepest accommodation behind a productive reef trend. 17-9 ka was a time of rapid eustatic rise (∼7 mm/year) and low sedimentation (flux=0.4 km3/ka). At ∼9 ka, sediment flux to the mud blanket increased to 41 km3/ka because of ravinement of Brazos and Colorado deltas. By ∼5.5 ka, Texas was experiencing a climatic optimum, which reduced sediment supply from local rivers. During the last 3.5 ka the mud blanket received 172 km3 of fine-grained Colorado and Brazos sediments. The most pronounced trend is the anti-correlation of mud blanket growth and rates of eustatic rise.
    Keyword
    Geology; Geophysics
    Citation
    Weight, Robert William Reed. "The Texas mud blanket: Understanding fine-grained sediment flux in the NW Gulf of Mexico during the previous transgression." (2010) Master’s Thesis, Rice University. https://hdl.handle.net/1911/62180.
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    Home | FAQ | Contact Us | Privacy Notice | Accessibility Statement
    Managed by the Digital Scholarship Services at Fondren Library, Rice University
    Physical Address: 6100 Main Street, Houston, Texas 77005
    Mailing Address: MS-44, P.O.BOX 1892, Houston, Texas 77251-1892
    Site Map