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Palaeo-yardangs: wind-scoured desert landforms at the Permo-Triassic unconformity

Citation

David B Loope, and David W Tewes, Palaeo-yardangs: wind-scoured desert landforms at the Permo-Triassic unconformity: .

Summary

In Canyonlands National Park, south-east Utah, at least 29 partly exhumed, aligned sandstone ridges trending generally N20°W occur at the upper unconformable surface of the Lower Permian (Leonardian) White Rim Sandstone. The ridges are at least 1·5 km long, 250 m wide and have up to 14 m of vertical relief (mean of 9 m). A thin lag of coarse sandstone that contains wind-ripple laminae and granule ripples directly overlies the ridges. Angular blocks of sandstone within the lag and sand-filled fissures immediately below the lag, within the ridges, attest to early cementation of the ridge-forming material. SE-dipping aeolian cross-strata within the White Rim Sandstone and within the lag closely parallel the ridge trend. The ridges are [...]

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  • Upper Colorado River Basin

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From Source - Mendeley RIS export <br> On - Tue May 10 11:38:21 CDT 2011

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Title Citation Palaeo-yardangs: wind-scoured desert landforms at the Permo-Triassic unconformity

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