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Full-Text Articles in Physical Sciences and Mathematics
Structural Analysis Of Deformed Caprock Associated With A Salt Shoulder At Gypsum Valley Salt Wall, Paradox Basin, Colorado, Hanah Draper
Structural Analysis Of Deformed Caprock Associated With A Salt Shoulder At Gypsum Valley Salt Wall, Paradox Basin, Colorado, Hanah Draper
Open Access Theses & Dissertations
This study documents the style and distribution of deformation present in Triassic-age gypsic and carbonate caprock associated with the Gypsum Valley Salt Wall Salt Shoulder in the Paradox Basin, Colorado in order to determine the mechanism and timing of deformation. Mapping of gypsic and carbonate capstone facies shows that the caprock layering that was generated during formation has been deformed by large-and-small-scale folding and faulting, brecciation, and boudinage. Deformation within the caprock resulted in widely variable orientations along the length of the salt shoulder, that also varies locally in intensity of deformation and with proximity to the passively rising diapir …
Fluvial Interactions Of The Jurassic Salt Wash Member Of The Morrison Formation With The Gypsum Valley Salt Diapir, Co, Clair Henry Bailey
Fluvial Interactions Of The Jurassic Salt Wash Member Of The Morrison Formation With The Gypsum Valley Salt Diapir, Co, Clair Henry Bailey
Open Access Theses & Dissertations
Gypsum Valley diapir in Gypsum Valley Colorado is an ideal location to investigate the interaction between a fluvial system and a diapir going through late stage collapse and rise. The outcrop exposures in Gypsum Valley allow for the analysis in changes of the fluvial system of the Salt Wash Member of the Morrison Formation as it gets redirected by the salt wall and deposits sediment on top of, on the margins, and in the Disappointment and Dry Creek minibasins. Previous work has focused on understanding and predicting how fluvial systems react when they encounter a salt diapir, but all the …
Supra-Salt Syndepositional Folding Within The Jurassic Morrison Formation, Big Gypsum Valley, Colorado, Alondra Soltero
Supra-Salt Syndepositional Folding Within The Jurassic Morrison Formation, Big Gypsum Valley, Colorado, Alondra Soltero
Open Access Theses & Dissertations
The Paradox Basin, along the Utah and Colorado border, exposes salt diapirs that form elongate "salt walls". Most exposures of sediments that were deposited during salt movement are hundreds of meters from the contacts. However, in the southeastern part of the Gypsum Valley diapir, a set of tight folds within the Jurassic Morrison Formation are preserved along the diapir margins where they overlie salt. These are best exposed at the southeastern end of Big Gypsum Valley. Previous interpretations suggested that the Morrison Formation folding and faulting occurred during dissolution of the diapir. However, field mapping reported here reveals that the …
Sequence Stratigraphy, Diagenesis, And Depositional Facies Of An Exposed Megaflap: Pennsylvanian Hermosa Group, Gypsum Valley Salt Wall, Paradox Basin, Colorado, Kyle Thomas Deatrick
Sequence Stratigraphy, Diagenesis, And Depositional Facies Of An Exposed Megaflap: Pennsylvanian Hermosa Group, Gypsum Valley Salt Wall, Paradox Basin, Colorado, Kyle Thomas Deatrick
Open Access Theses & Dissertations
Outcrop exposures mostly of the Pennsylvanian Honaker Trail Formation provide a 2 km strike-oriented view of a megaflap on the southwestern flank of the Gypsum Valley salt wall, Paradox Basin, Colorado that serves as an outcrop analog for megaflaps recently drilled unexpectedly in the Gulf of Mexico and other salt basins worldwide. The near vertical (80-90°) stratal panel comprises a 60 m thick succession of non-evaporite facies of the Pennsylvanian upper Paradox Formation, overlain by a 117 m section of cyclic shallow marine carbonates and siliciclastics of the Honaker Trail Formation. Near vertical upper Paradox and Honaker Trail strata are …
Facies Changes Associated With Formation Of An Extensive Salt Shoulder By The Coastal And Eolian Carmel And Entrada Formations, Gypsum Valley, Colorado, Ryan Burtron Ronson
Facies Changes Associated With Formation Of An Extensive Salt Shoulder By The Coastal And Eolian Carmel And Entrada Formations, Gypsum Valley, Colorado, Ryan Burtron Ronson
Open Access Theses & Dissertations
A salt shoulder forms a zone at the margin of a salt diapir where that margin steps relatively abruptly inward. These shoulders form when the salt rise rate near the diapir margin substantially decreases or stops relative to the salt rise rate at the inboard central part of the diaper. Based on current models of interactions between these salt shoulders and overlying sediment, it was anticipated that the thickness changes of the Entrada and Carmel formations would be only gradual and that any notable thinning would take place proximal to the neck portion of the diapir that would still have …
Salt Tectonic Controls On Facies And Sequence Stratigraphy Of The Triassic Chinle Formation, Gypsum Valley Salt Wall, Colorado, Elizabeth Heness
Salt Tectonic Controls On Facies And Sequence Stratigraphy Of The Triassic Chinle Formation, Gypsum Valley Salt Wall, Colorado, Elizabeth Heness
Open Access Theses & Dissertations
This study focuses on mapping the facies geometry and depositional sequences of the Chinle Formation adjacent to the Gypsum Valley Salt Wall (GVSW). Interactions between salt tectonics and fluvial systems can affect sediment distribution. The upper Triassic Chinle Formation was deposited across the western U.S. in an intra-cratonic, fluvial environment. Throughout the Paradox Basin in Utah and Colorado, deformation associated with rising salt anticlines and subsiding minibasins coincided with Chinle deposition. In most areas, only small and isolated remnant Chinle outcrops actually expose the contact between Chinle sediments and the salt diapir. In Gypsum Valley three study areas were mapped …
Structural And Stratigraphic Development Of A Salt Diapir Shoulder, Gypsum Valley, Colorado, Joshua Coleman Mcfarland
Structural And Stratigraphic Development Of A Salt Diapir Shoulder, Gypsum Valley, Colorado, Joshua Coleman Mcfarland
Open Access Theses & Dissertations
A salt shoulder is a low-angle segment of the salt-sediment interface where the margin of a passive diapir steps abruptly inboard. The Late Triassic Chinle Formation overlies caprock on the northeastern margin of Gypsum Valley (GV) at the salt-sediment interface in the natural amphitheater of Bridge Canyon. Modern erosion of the Dolores River has created 3D outcrop of the salt shoulder, expressed by a 500 meter wide, sub-horizontal platform that dips abruptly into the subsurface to the northeast toward the Dry Creek minibasin. Within Bridge Canyon, seven facies associations have been recognized and interpreted within the Chinle Formation: 1) non-caprock …