Salma caldera

The Salma caldera is a late Proterozoic caldera complex in the northeastern Arabian Shield of Saudi Arabia. It encompasses rhyolitic volcanic rocks, a peralkaline ring intrusion that rose along a fracture formed during caldera collapse, and a younger resurgent metaluminous and peraluminous granite core.[1]

References
  1. "The Salma Caldera complex, northeastern Arabian Shield, Kingdom of Saudi Arabia" (PDF). Retrieved 28 June 2022.

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