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  3. Vol. 8 (2021): Geology of the Intermountain West

Vol. 8 (2021): Geology of the Intermountain West

DOI: https://doi.org/10.31711/giw.v8
Published: 2021-08-13

Articles

  • Photomicrograph of carbonate spherulites formed by a Jurassic variant of the betaproteobacteria Ralstonia eutropha H16. The spherulites are commonly found in the upper surfaces of mound spring deposits of the Upper Jurassic Morrison Formation of central Montana. The black specks are interpreted to be fossil betaproteobacteria remnants preserved in the spherulite. Image shown in crossed nicols.
    Carbonate mound springs of the Upper Jurassic Morrison Formation of central Montana and their paleoclimatic significance for the northern foreland basin
    Dean R. Richmond, John Pigott, Richard Lupia, Michael Behm, David Hein
    1-26
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  • Example of proximal contorted heterolithic facies observed at Sevenmile Canyon, Utah, displaying internally contorted, locally derived clasts with mud draping along the folded foresets and antiformal stacking towards the base of the unit.
    Localized bank collapse or regional event? A study of distinct contorted heterolithic facies observed in the Lower Jurassic Kayenta Formation, Utah and Arizona
    Charlotte L. Priddy, Amy V. Regis, Stuart M. Clarke, A. Graham Leslie, Thomas J.H. Dodd
    27-44
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  • Drone photograph of the north side of Vermillion Creek. The Upper Cretaceous Rock Springs Formation is centered in the photograph. The top of the Rock Springs Formation is just right of center within a prominent valley. Above the Rock Springs Formation is the gray-colored Trail Member of the Ericson Sandstone, followed by the brown colored Rusty zone of the Ericson Sandstone. The Rusty Member also forms a prominent valley. The Canyon Creek Member of the Ericson Sandstone is in the upper right-hand corner of the photograph. The horizontal distance across the center of the photograph is approximately 500 m.
    The Upper Cretaceous Rock Springs Formation of northwest Colorado A previously undescribed key deltaic outcrop
    Stephen P. Phillips, Samuel M. Hudson
    45-71
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