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Cone sheet swarm, resurgence of tejeda caldera, and the early geologic history of gran Canaria

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Abstract

The southwestern half of Gran Canaria probably represents the lower part of a large Tertiary volcano. The following stages in its development are recognized: alkali olivine basalt shield volcano; caldera collapse and emission of large quantities of alkali trachytic to soda rhyolitic ash flows; building of a central volcano inside the caldera, and high level intrusion and resurgent doming of the central volcano’s substructure by thick trachytic sills, a central syenite stock, and numerous trachytic cone sheets. The syenite stock and the younger cone sheet system inside the caldera suggest that two stages of doming followed caldera collapse.

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Schmincke, H.U. Cone sheet swarm, resurgence of tejeda caldera, and the early geologic history of gran Canaria. Bull Volcanol 31, 153–162 (1967). https://doi.org/10.1007/BF02597011

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