About: Ora Caldera

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The Ora Caldera is a Permian supervolcano in the Southern Alps of northern Italy. This 42 km (26 mi) wide and 40 km (25 mi) long caldera was formed by a supereruption 277–274 million years ago that produced more than 1,000 km3 (240 cu mi) of rhyodacitic-rhyolitic ignimbrite. The ignimbrite from this eruption forms the 10 to 1,350 m (33 to 4,429 ft) thick Ora Formation, which represents the youngest eruptive unit of the Athesian Volcanic Group.

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  • The Ora Caldera is a Permian supervolcano in the Southern Alps of northern Italy. This 42 km (26 mi) wide and 40 km (25 mi) long caldera was formed by a supereruption 277–274 million years ago that produced more than 1,000 km3 (240 cu mi) of rhyodacitic-rhyolitic ignimbrite. The ignimbrite from this eruption forms the 10 to 1,350 m (33 to 4,429 ft) thick Ora Formation, which represents the youngest eruptive unit of the Athesian Volcanic Group. (en)
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  • The Ora Caldera is a Permian supervolcano in the Southern Alps of northern Italy. This 42 km (26 mi) wide and 40 km (25 mi) long caldera was formed by a supereruption 277–274 million years ago that produced more than 1,000 km3 (240 cu mi) of rhyodacitic-rhyolitic ignimbrite. The ignimbrite from this eruption forms the 10 to 1,350 m (33 to 4,429 ft) thick Ora Formation, which represents the youngest eruptive unit of the Athesian Volcanic Group. (en)
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  • Ora Caldera (en)
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