Thesis (M.S.)--Wisconsin. / Includes bibliographical references (leaves 178-190).

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Thesis (M.S.)--University of Wisconsin--Madison, 1983. / Typescript. Includes bibliographical references (leaves 108-114).

Thesis (M.S.)--University of Wisconsin--Madison, 1983. / Typescript. Title from title screen (viewed Sept. 20, 2007). Includes bibliographical references (leaves 108-114). Online version of the print original.

Cone penetration tests (CPTs) have been developed for engineering investigations of sands and finer sediments. CPTs produce high resolution, repeatable and continuous records to depths of several tens of metres, and resemble wireline logs used in the petroleum industry. It is the objective of this dissertation to demonstrate that they can be used for facies analysis in a similar manner, by using these data to develop a facies model for the modern Fraser River delta, British Columbia, Canada. CPT data provide reliable estimates of sediment type and gram size, so that bed thicknesses, sharp and gradational contacts, coarsening and fining upward sequences, bed continuity and dips can be readily identified. The facies model of the Fraser delta is based on a database of over 800 CPTs and 20 continuously cored boreholes. These data demonstrate that the topset is dominated by a nearly continuous sharp-based sand unit that is 8 to 30 m thick, fines upward and is interpreted to represent a complex of distributary channel deposits. The widespread distribution of this sand unit is the result of distributary channel migration in a tidal flat setting and avulsion or channel switching in the upper delta plain. The sand unit is gradationally overlain by a thinner sequence of interbedded sands and silts deposited in tidal flat, abandoned channel and floodplain environments. Deposits of the upper foreset (<60 m) dip up to 7° seaward and are dominated by silts, interbedded and interlaminated with sands. Several intergradational facies, ranging from dominantly silt to dominantly sand, occur and represent increasing proximity to active distributary mouths. These sediments are organized into metre-scale sandy and silty coarsening-upward sequences that are interpreted to represent annual deposits, and sharp-based sand units that represent sedimentary gravity flow deposits. Deeper foreset deposits are dominated by bioturbated silts. The distribution of facies on both the topset and the foreset has been controlled by the interaction of tidal and fluvial processes. CPT data played a key role in developing this facies model of the Fraser River delta. Most facies have distinct CPT signatures. For example, the topset sand unit and overlying deposits have a CPT signature comparable to the “bell-shaped” gamma ray log signature typical of channel deposits. In the foreset, the seaward dips, the coarsening upward sequences and the sharp-based sands are readily observable on CPT data. Although cores were essential to confirm the facies significance of these signatures, the large volume of CPT data permitted recognition of facies distributions and relationships “at a glance” throughout the delta, rather than at the relatively few site where continuous cores were available. Furthermore, CPTs can be acquired for a fraction of the cost of continuous cores, so that CPT data are potentially an invaluable tool for stratigraphic investigations of other modern sedimentary environments dominated by sands and finer sediments. / Graduate

Thesis (Ph. D.)--University of Texas at Austin, 1999. / Vita. Includes bibliographical references (leaves 269-286). Available also in a digital version from Dissertation Abstracts.

Thesis (M.S.)--Oregon State University, 1997. / Typescript (photocopy). Includes bibliographical references (leaves 135-141). Also available via the World Wide Web.

Thesis (Ph. D.)--University of Texas at Austin, 1999. / Vita. Includes bibliographical references (leaves 325-351). Available also in a digital version from Dissertation Abstracts.

Thesis (Ph. D.)--University of Texas at Austin, 2003. / Vita. Includes bibliographical references. Available also from UMI Company.

The Nisku Formation in the Alberta subsurface consists of bank facies, reefal facies, and basinal/slope facies along the Outer Shelf. The bank facies was not previously recognized, and is here designated the Dismal Creek Member. Most buildups are coral-bearing mudmounds. / The Nisku Formation was affected by more than twenty diagenetic processes, most notably by dolomitization and anhydritization. The buildups were partially lithified in shallow phreatic environments, and some were subaerially exposed. Dolomitization took place at depths of about 300 to 1000 m by fluids that were derived mainly from the underlying Ireton Formation. Most of the anhydrites formed during the last stages of and/or after dolomitization. After oil emplacement, thermochemical redox reactions between hydrocarbons and sulfates resulted in partial removal of anhydrite in the deepest buildups, and the formation of 'dead' oil, sour gas, replacive calcite, saddle dolomite, celestite, and native sulfur. Diagenetic changes after maximum burial were very minor.