Laminar Viscous Flowage Structures in Ash-Flow Tuffs from Gran Canaria, Canary Islands

  title={Laminar Viscous Flowage Structures in Ash-Flow Tuffs from Gran Canaria, Canary Islands},
  author={Hans-Ulrich Schmincke and Donald A. Swanson},
  journal={The Journal of Geology},
  pages={641 - 644}
At least $$100 km.^{3}$$ of trachytic and peralkaline soda rhyolitic ash flows were erupted during late Miocene to early Pliocene time from a source near the center of Gran Canaria, Canary Islands. Their deposits cover more than $$350 km.^{2}$$ and are typical of ash-flow deposits elsewhere in that they show vertical changes in color, degree of crystallization, and denseness of welding. They underwent unusually intense vapor-phase crystallization, chiefly to aegirine-augite, Na-amphibole… 
Laminar Viscous Flowage Structures in Ash-Flow Tuffs from Gran Canaria, Canary Islands: A Discussion
Schmincke and Swanson (1967) recently presented a most interesting and valuable paper in which they discuss laminar flowage features in peralkaline ash-flow tuffs on the Canary Islands. The purpose
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    Geological Magazine
  • 1985
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