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Miocene rock formations, Playa de Tasarte, Gran Canaria, Canary Islands.

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Photo ID: 468
Gallery ID: 58
Photo Title: Miocene rock formations, Playa de Tasarte, Gran Canaria, Canary Islands.
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Keywords:
playa de tasarte, gran canaria, canary islands, miocene rock, xenolith rich basaltic ignimbrite, ignimbrite p1, basaltic ignimbrite p1, composite ignimbrite, ignimbrite, highly welded ignimbrite, silicic ignimbrites, caldera de tejeda, miocene caldera, explosive eruption, differentiation, crystallization, trachyte, rhyolite, basalt, cumulate blocks, subvolcanic, lithic fragments, anorthoclase crystals,
Description:
General close up view of the highly welded, xenolith rich basaltic part of ignimbrite P1, which was emitted 14.1 million years ago a cataclysmic volcanic explosion sent 85 cubic kilometres of ash, rock fragments and burning clouds of pulverised magma into the air, covering 400 Km2 of the island in a composite rhyolitic – trachytic – basaltic ignimbrite. The scale of the eruption was such that the magma chamber was emptied so quickly, that the basaltic magma which had only just intruded into the upper, highly differentiated, layered trachy-rhyolitic chamber was also emitted explosively, accumulating large amounts of lithic fragments from a now disintegrating central portion of the island, together with rhyolitic fragments and crystals. This rock sample is rather deteriorated by its proximity to the sea.
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