Keywords |
  • Volcanology


A dyke (or dike) is a sheet of igneous rock that has penetrated a fissure through various layers of rock.

The thickness of the dyke can vary from a few centimetres to a few tens of metres but its length can extend over several kilometres.

Under the action of erosion, a dyke can become isolated from the surrounding rocks forming a wall.

Dyke Dyke


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