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The geology of the Cayman Islands includes carbonates deposited and periodically eroded over the last 30 million years. The underlying Cayman Ridge is proposed as an uplifted fault block. The oldest rocks are believed to be granodiorite, followed by a cap of basalt. Situated near the Oriente Transform Fault and the Mid-Cayman Rise, the islands are tectonically active. Older Miocene and Pliocene crystalline limestone is overlain by the Pleistocene Ironshore Formation reef limestone and calcarenite.

References

1. Brunt, M.A; Davies, J.E (2012-12-06). The Cayman Islands: Natural History and Biogeography. Springer. ISBN 9789401109048.
2. Jones, Brian (1994). "Geology of the Cayman Islands". The Cayman Islands. Monographiae Biologicae. Vol. 71. pp. 13–49. doi:10.1007/978-94-011-0904-8_2. ISBN 978-94-010-4391-5.
3. Brunt, M. A.; Giglioli, M. E. C.; Mather, J. D.; Piper, D. J. W.; Richards, H. G. (May 1973). "The Pleistocene rocks of the Cayman Islands | Geological Magazine | Cambridge Core". Geological Magazine. 110 (3): 209–221. doi:10.1017/S0016756800036037. Retrieved 2018-11-09.

• Geography of the Cayman Islands
• Natural history of the Cayman Islands
• Geology of British Overseas Territories
• Geology of the Caribbean
• Geology by dependent territory