Ring dike

Ring dike

A ring dike or ring dyke in geology refers to an intrusive igneous body. Their chemistry, petrology and field appearance precisely match those of dikes or sill, but their concentric or radial geometric distribution around a centre of volcanic activity indicates their sub-volcanic origins.

One of the best exposed and studied is the Loch Bà ring dike, Isle of Mull, Scotland.

See also

* Batholith
* Fissure vent
* Laccolith
* Runamo, formerly interpreted as a runic inscription.


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