Ring dike

A ring dike or ring dyke is an intrusive igneous body that is circular, oval or arcuate in plan and has steep contacts.^[1] While the widths of ring dikes differ, they can be up to several thousand meters.^[2] The most commonly accepted method of ring dike formation is directly related to collapse calderas.^[3]

^ Billings, Marland P. "Section of Geology and Mineralogy: Ring-dikes and Their Origin." Transactions of the New York Academy of Sciences 5.6 Series II (1943): 131–44
^ Johnson, Scott E., S. R. Paterson, and M. C. Tate. "Structure and emplacement history of a multiple-center, cone-sheet–bearing ring complex: The Zarza Intrusive Complex, Baja California, Mexico." Geological Society of America Bulletin 111.4 (1999): 607–19).
^ Gudmundsson, Agust. "Formation of collapse calderas." Geology 16.9 (1988): 808–10.

[1] Billings, Marland P. "Section of Geology and Mineralogy: Ring-dikes and Their Origin." Transactions of the New York Academy of Sciences 5.6 Series II (1943): 131–44

[2] Johnson, Scott E., S. R. Paterson, and M. C. Tate. "Structure and emplacement history of a multiple-center, cone-sheet–bearing ring complex: The Zarza Intrusive Complex, Baja California, Mexico." Geological Society of America Bulletin 111.4 (1999): 607–19).

[:1-3] Gudmundsson, Agust. "Formation of collapse calderas." Geology 16.9 (1988): 808–10.

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