A dyke that is roughly circular in plan, formed by upwelling of magma in a conical or cylindrical fracture system.
Example sentencesExamples
- The base of the cauldron appears as a circular intrusion; its sides forms a ring dyke.
- The property, surrounded by a ring dyke erected after the flood of 1997 through the flood-proofing program has been the subject of numerous heated discussions at various levels of government.