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Compactional deformation bands in Wingate Sandstone; additional evidence of an impact origin for Upheaval Dome, Utah Field and microstructural observations from Upheaval Dome, in Canyonlands National Park, Utah, show that inelastic strain of the Wingate Sandstone is localized along compactional deformation bands. These bands are tabular discontinuities (b0.5 cm thick) that accommodate inelastic shear and compaction of inter-granular volume. Measurements of porosity and grain size from nondeformed samples are used to define a set of capped strength envelopes for the Wingate Sandstone. These strength envelopes reveal that compactional deformation bands require at least ca. 0.7 GPa (and potentially more than 2.3 GPa) of effective mean stress in order to nucleate within this sandstone. We find that the most plausible geologic process... Categories: Publication; Types: Citation, Journal Citation; Tags: Canyonlands National Park, Earth and Planetary Science Letters, Upheaval Dome, Wingate Sandstone, deformation band, All tags... impact crater, Fewer tags