Active Deformation at Canyonlands National Park: Distribution of Displacements across the Grabens Using Spaceborne Geodesy
The Needles District of Canyonlands National Park in southeastern Utah is a unique geologic region in which gravitationally induced extension can be observed. Prior to our study, knowledge of Canyonlands deformation rates was limited to long term geologic averages between 2 mm/yr and 2 cm/yr that assumed spatial and temporal uniformity. Our research utilizes two geodetic techniques, Global Positioning System (GPS) and Interferometric Synthetic Aperture Radar (InSAR), to observe a clearer picture of current deformation rates across the entire study area. Results indicate relative regional subsidence of up to 3 mm/yr within the graben system. The interferograms additionally show spatially varied rates of horizontal deformation, with a maximum rate of deformation (6 mm/yr) near the eastern margin of the faulted region. Observations of deformation along several profiles support prior modeling efforts that suggest basal salt flow regulates overburden deformation.
Marsic, Scott Douglas, "Active Deformation at Canyonlands National Park: Distribution of Displacements across the Grabens Using Spaceborne Geodesy" (2003). Canyonlands Research Bibliography. Paper 18.
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