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Drumlins
  • About the project
  • Instability theory
  • Instability in a system
  • Definitions
    • Definitions
      • Drumlins
      • Subglacial bedforms
      • Flutes
    •  
      • Ribbed or rogen moraines
      • Mega-scale glacial lineations
      • Crag-and-tail
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Drumlins

Menu
  • About the project
  • Instability theory
  • Instability in a system
  • Definitions
    • Definitions
      • Drumlins
      • Subglacial bedforms
      • Flutes
    •  
      • Ribbed or rogen moraines
      • Mega-scale glacial lineations
      • Crag-and-tail
 
Drumlins left over by the retreating glaciers in the Langdale Valley, Lake District, UK

Drumlins

This website is part of a project funded by the Natural Environment Research Council of the UK which focuses on testing the instability theory of subglacial bedform production.

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Drumlin map
About the project 
Transverse sand ripples formed on a river bed arising from an instability in the coupled flow of water and sand.
Transverse sand ripples formed on a river bed arising from an instability in the coupled flow of water and sand. Note that two wavelengths of bedforms exist presumably resulting from different flow stages of the river.
Instability theory 

Definitions

Drumlins of the Puget Sound, Washington State, USA. This LIDAR image is about 6 km wide. Image courtesy: Ralph Haugerud.
Drumlins 
Man surrounded by flute landforms
Flutes 
Nigardsbreen glacier, Norway
Nigardsbreen glacier, Norway. Credit: Dr Darrel Swift.
Subglacial bedforms 
Ribbed or rogen moraines
Ribbed or rogen moraines 
Mega-scale glacial lineations
Mega-scale glacial lineations (MSGL) 
Crag and tail
Crag-and-tail 
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