Ring dike

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Ring dykes in the Pilanesberg Game Reserve, South Africa

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 subvolcanic origins.

Notable examples[edit]

See also[edit]


  1. ^ a b Hall, Anthony, Igneous Petrology, Longman, 1987 p.75 - 78 ISBN 0-582-30174-2