Onshore .22tar volcanoes.22 Asphalt volcano

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two small tar volcanoes in old carpinteria, california asphalt mine, 1906


onshore tar volcanoes have been observed, instance in carpinteria, california in asphalt mine. asphalt exuded joint cracks in upturned monterey shale forming floor of mine. similar structures still form on beach below carpinteria.








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