Aeolian Genetic Stratigraphy: An Example from the Middle Jurassic Page Sandstone, Colorado Plateau

  1. K. Pye4 and
  2. N. Lancaster5
  1. K. G. Havholm1,†,
  2. R. C. Blakey2,
  3. M. Capps2,
  4. L. S. Jones2,
  5. D. D. King2 and
  6. G. Kocurek1

Published Online: 8 APR 2009

DOI: 10.1002/9781444303971.ch7

Aeolian Sediments: Ancient and Modern

Aeolian Sediments: Ancient and Modern

How to Cite

Havholm, K. G., Blakey, R. C., Capps, M., Jones, L. S., King, D. D. and Kocurek, G. (2009) Aeolian Genetic Stratigraphy: An Example from the Middle Jurassic Page Sandstone, Colorado Plateau, in Aeolian Sediments: Ancient and Modern (eds K. Pye and N. Lancaster), Blackwell Publishing Ltd., Oxford, UK. doi: 10.1002/9781444303971.ch7

Editor Information

  1. 4

    Reading, UK

  2. 5

    Reno, Nevada, USA

Author Information

  1. 1

    Department of Geological Sciences, University of Texas at Austin, Austin, TX 78713, USA

  2. 2

    Department of Geology, Northern Arizona University, Flagstaff, AZ 86011, USA

  1. Geological Sciences, AJ-20, University of Washington, Seattle, WA 98195, USA

Publication History

  1. Published Online: 8 APR 2009
  2. Published Print: 27 MAY 1993

ISBN Information

Print ISBN: 9780632035441

Online ISBN: 9781444303971

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Keywords:

  • ancient aeolian environments;
  • aeolian genetic stratigraphy - example from Middle Jurassic Page Sandstone, Colorado Plateau;
  • Middle Jurassic Page Sandstone - three-dimensional mosaic of basic aeolian building blocks;
  • aeolian succession accumulation - episodic process in Pleistocene—Holocene aeolian successions;
  • Page Sandstone – coastal erg along Carmel inland seaway;
  • genetic stratigraphic units and supersurfaces;
  • around Moab - pods of Page Sandstone;
  • upper Middle Unit (PMu) – above upper tongue of Judd Hollow and RM supersurface

Summary

Regional tracing and correlation of super bounding surfaces and the aeolian accumulations they cap show that the Middle Jurassic Page Sandstone consists of a three-dimensional mosaic of these basic aeolian building blocks. These basic supersurface bounded units can be grouped into six architectural assemblages termed the Basal, Lower, Isolated, Middle, Upper and Transition Units. The Basal Unit is a complex, discontinuous assemblage formed on the irregular J-2 regional unconformity and may not represent genetically related strata; scouring associated with emplacement of the overlying unit indicates that it was initially more widespread. The main body of the Page consists of three assemblages. The Lower Unit pinches out against the rising J-2 surface along the Monument Bench, and is bounded in a stepwise fashion by supersurfaces that show the progressive eastward transgression of the marine Judd Hollow Member of the Carmel Formation with supersurfaces extending inland. The Isolated Unit, occurring as outliers, is tentatively correlated with the Basal and Lower Units. The Middle Unit inter-tongues throughout with the Carmel Formation, and consists of the amalgamation of layers and lenses of aeolian units separated by multiple truncational supersurfaces, some of which can be traced into tongues of the Carmel. The Upper Unit of the Page is locally deeply scoured by large troughs, whereas a Transition Unit associated with the onset of Carmel deposition varies from a thin reworked zone to local aeolian build-ups. Throughout the Page, supersurfaces are characterized by polygonal fractures, relief and superposed sabkha and subaqueous strata. Identification of Page genetic units demonstrates a means of internal correlation within aeolian units, and provides a way to link internal aeolian stratigraphy to external events manifested in adjacent non-aeolian units.