Transgressive-Regressive Cycles and the Occurrence of Coal in Some Upper Cretaceous Strata of Utah, U.S.A.

  1. R. A. Rahmani and
  2. R. M. Flores
  1. Thomas A. Ryer

Published Online: 28 APR 2009

DOI: 10.1002/9781444303797.ch12

Sedimentology of Coal and Coal-Bearing Sequences

Sedimentology of Coal and Coal-Bearing Sequences

How to Cite

Ryer, T. A. (2009) Transgressive-Regressive Cycles and the Occurrence of Coal in Some Upper Cretaceous Strata of Utah, U.S.A., in Sedimentology of Coal and Coal-Bearing Sequences (eds R. A. Rahmani and R. M. Flores), Blackwell Publishing Ltd., Oxford, UK. doi: 10.1002/9781444303797.ch12

Author Information

  1. RPI/Colorado, Inc., 100 Arapahoe Avenue, Boulder, CO 80302, USA

Publication History

  1. Published Online: 28 APR 2009
  2. Published Print: 26 MAR 1985

ISBN Information

Print ISBN: 9780632012862

Online ISBN: 9781444303797

SEARCH

Keywords:

  • transgressive-regressive cycles and occurrence of coal – upper Cretaceous strata – Utah, U.S.A;
  • Cenomania–Santonian strata;
  • cyclothem;
  • Tununk–tropic transgression;
  • palaeoshoreline trends

Summary

Cenomanian–Santonian strata contain approximately 60% of the known Cretaceous coal resources of Utah. The areal and temporal distribution of these resources can be related to the transgressive-regressive history of the western shoreline of the Interior Cretaceous seaway. Two orders of transgressive-regressive cycles, the larger of which corresponds to third-order cycles of Vail and others, are deemed important in analysing the distribution of coal in Utah. The largest coal fields are associated with extensive vertical stacking of the deposits of what are here termed fourth-order cycles at the transgressive and regressive maxima of third-order cycles. Deposits of transgressive and regressive phases of third-order cycles contain only minor amounts of coal. This genetic relationship may prove useful in predicting areas of important Cretaceous coal resources in deeper parts of structural basins in the Rocky Mountain region.