Bulletin Volcanologique

, Volume 33, Issue 2, pp 549–565 | Cite as

An excursion to the Bayuda volcanic field of Northern Sudan

  • D. C. Almond
  • Farouk Ahmed
  • Badr Eldin Khalil


A cluster of well-preserved recent volcanoes in the northern Bayuda Desert make up a more or less continuous field some 520 km2 in area surrounded by a number of isolated centres of eruption. The volcanoes are numerous but small; up to 400 m in height and 0.35 km2 in volume. Most of them are simple composite volcanoes with a pyroclastic cone skirted by a small lava field erupted from the same vent after explosive eruptions had ceased. In a few instances, however, the cone was eviscerated by more violent eruptions, leaving a deep explosion crater. The lavas are all nepheline-normative alkali basalts and contain a variety of xenocrysts and xenoliths from at least three different sources. The distribution of the recent volcanoes was partly controlled by large granitic ring-intrusions of the Basement Complex country rocks. These intrusions belong to the Younger Granite association of late Precambrian or Lower Palaeozoic age and represent a volcanic-intrusive episode widespread in northern Africa. The complexes are composed of cale-alkaline and peralkaline granites and syenites and a related plexus of dyke swarms.


Volcanic Rock Tephra Sudan Pyroclastic Rock Volcanic Field 
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Copyright information

© Stabilimento Tipografico Francesco Giannini & Figli 1969

Authors and Affiliations

  • D. C. Almond
    • 1
  • Farouk Ahmed
  • Badr Eldin Khalil
  1. 1.Department of Geology and GeographyKingston College of TechnologyKingston-upon-ThamesEngland

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