Geometry and Evolution of Platform-Margin Bioclastic Shoals, Late Dinantian (Mississippian), Derbyshire, UK

  1. Maurice E. Tucker5,
  2. James Lee Wilson6,
  3. Paul D. Crevello7,
  4. J. Rick Sarg8 and
  5. J. Fred Read9
  1. R. L. Gawthorpe1,† and
  2. P. Gutteridge2,‡

Published Online: 15 APR 2009

DOI: 10.1002/9781444303834.ch2

Carbonate Platforms: Facies, Sequences and Evolution

Carbonate Platforms: Facies, Sequences and Evolution

How to Cite

Gawthorpe, R. L. and Gutteridge, P. (1986) Geometry and Evolution of Platform-Margin Bioclastic Shoals, Late Dinantian (Mississippian), Derbyshire, UK, in Carbonate Platforms: Facies, Sequences and Evolution (eds M. E. Tucker, J. L. Wilson, P. D. Crevello, J. Rick Sarg and J. F. Read), Blackwell Publishing Ltd., Oxford, UK. doi: 10.1002/9781444303834.ch2

Editor Information

  1. 5

    Durham, UK

  2. 6

    New Braunfels, Texas, USA

  3. 7

    Littleton, Colorado, USA

  4. 8

    Midland, Texas, USA

  5. 9

    Blacksburg, Virginia, USA

Author Information

  1. 1

    Department of Geological Sciences, University of Durham, Durham DH1 3LE, UK

  2. 2

    School of Earth Sciences, Thames Polytechnic, Bigland Street, London E1 2NG, UK

  1. Department of Geology, The University, Manchester M13 9PL, UK

  2. Cambridge Carbonates, 22 George Street, Cambridge, CB4 1AJ, UK

Publication History

  1. Published Online: 15 APR 2009
  2. Published Print: 22 DEC 1986

ISBN Information

Print ISBN: 9780632027583

Online ISBN: 9781444303834



  • geometry and evolution of platform-margin bioclastic shoals – late Dinantian, Derbyshire, UK;
  • bioclastic sand shoals;
  • microfacies;
  • bedform dynamics;
  • Hope Cement Works Quarry


A belt of large-scale bioclastic sand shoals developed at the northern margin of the Derbyshire carbonate platform in northern England during the late Asbian–Brigantian (Dinantian). This belt was at least 2 km wide and extended at least 3 km parallel to the shelf margin. These sand shoals form a shoal complex at least 50m in thickness composed mainly of bioclastic grainstone. The shoal complex has been divided into shoal sequences by boundaries which show toplap, downlap and onlap configurations. Some of these sequences contain clinoforms which are interpreted as large scale bedforms. Changes in internal geometry of these clinoforms indicate a passage from vertical accretion to basinward progradation during bedform development. These bedforms commonly overlie emergence surfaces and probably developed following a relative rise in sea-level of 20–25m. Abandonment of these bedforms occurred as a result of subaerial exposure, high energy conditions causing erosional truncation, or the establishment of low energy conditions. Bedforms nucleated in a progressively basinward position throughout the deposition of the shoal complex resulting in basinward progradation of the complex as a whole.