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Dacitic ignimbrites with upwards increasing compactness near sibolangit (NE Sumatra, Indonesia) and their peculiar hydrology

  • Première Partie Communications Lues Au « International Symposium On Volcanology » (Nouvelle-Zélande, Du 22 Nov. À 3 Déc. 1965)
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Abstract

Several dozens of springs with a total yield of about 500 litres per second emerge from a body of ignimbritic biotite-hypersthene-hornblende dacitevitrophyre-tuff with upwards increasing compactness. These springs are situated almost exactly on a level and emerge from the lowermost parts of subvertical joints in the strongly welded upper part of the ash flow.

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Authors and Affiliations

  1. Geological Institute of the University of Amsterdam, The Netherlands

    W. P. de Roever

Authors
  1. W. P. de Roever
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Additional information

Paper read at the IAV International Symposium on Volcanology (New Zealand), scientific session of Nov. 25, 1965.

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de Roever, W.P. Dacitic ignimbrites with upwards increasing compactness near sibolangit (NE Sumatra, Indonesia) and their peculiar hydrology. Bull Volcanol 29, 105–111 (1966). https://doi.org/10.1007/BF02597147

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  • DOI: https://doi.org/10.1007/BF02597147

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