Summary of estimated eruption volumes for main silicic pyroclastic units, Oligocene flood volcanism, Yemen
Table 4 presents thickness data and estimated eruption
volumes for eight prominent silicic units.
Eruption volume estimates are divided into three zones: northern
Yemen (Sana’a area plus Escarpment section), Afro-Arabia (northern
Yemen plus Ethiopia), and distal deposits that include tuffs found
in Indian Ocean drill cores (Table 4 ).
50% increase in thickness of other units from east to west (see
Table 4 for details of volume calculations).
Minimum volume estimates for individual ignimbrites present in
northern Yemen range from 70 to 430 km 3
(Table 4 ).
This yields minimum volumes of 3,700 and 5,550 km 3
for distal tuffs associated with the Jabal Kura’a and Sam
Ignimbrites, respectively (Table 4 ).
Estimated minimum total volumes for other prominent silicic units
in Yemen range from 52 to 1,630 km 3 (DRE,
Table 4 )..
Distal airfall deposits have yet to be identified for
Paraná-Etendeka rheoignimbrites, however, in contrast to distal
airfall deposits correlated to several individual Yemen ignimbrites
(Table 4 ; Ukstins Peate et al.
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This table is from the article titled "Volcanic stratigraphy of large-volume silicic pyroclastic eruptions during Oligocene Afro-Arabian flood volcanism in Yemen"
(from Bulletin of Volcanology), which is copyrighted by Springer-Verlag. For more information on the
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