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The Katunga Volcano, South-West Uganda

Published online by Cambridge University Press:  01 May 2009

A. D. Combe
A. D. Combe
Affiliation:
Geological Survey of Uganda.
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Extract

The extinct volcano of Katunga (E. 30° 11′ 27″; S. 0° 28′ 17″ approx.) is in northern Igara which is part of western Ankole in south-west Uganda. The volcano is of special interest: (a)because of its isolation, the nearest neighbouring manifestation of volcanic activity being that in connection with the crater in which Lake Nkuguti lies, about 12½ miles to the N.N.W. in Bunyaruguru; and (b) because true lava-flows, the first to be discovered in the volcanic areas of north-west Ankole and Toro, composed of potash-rich olivine-melilitite (katungite), were extruded from it. The volcano is an outlier of the southern edge of that part of the western volcanic field of Uganda lying in, and adjacent to, the portion of the western rift depression about the northern end of Lake Edward, the southern end of the Buwenzori massif, and Lake George.

Type
Original Articles
Information
Geological Magazine , Volume 74 , Issue 5 , May 1937 , pp. 195 - 200
Copyright
Copyright © Cambridge University Press 1937

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References

page 197 note 1 Africa 1:250,000, Mbarara,

page 197 note 2 Combe, A. D., Ann. Rept. for 1933, Geol. Surv. of Uganda, 1934, paras. 305–311.Google Scholar

page 197 note 3 Combe, A. D., Ann. Rept. for 1929, Geol. Surv. of Uganda, 1930, paras. 69–73;Google Scholar Ann. Rept. for 1932, 1933, paras. 157–160;Google Scholar and Ann. Rept. for 1933, 1934, paras. 312–325.Google Scholar

page 197 note 4 Holmes, A., and Harwood, F. H., “Petrology of the Volcanic Fields East and South-East of Ruwenzori, Uganda,” Quart. Journ. Geol. Soc., lxxxviii, 1932, 370–442.CrossRefGoogle Scholar

page 198 note 1 Combe, A. D., Ann. Rept. for 1932 Geol. Surv.of Uganda, 1933, paras. 113, 114.Google Scholar

page 198 note 2 Combe, A. D., Ann. Rept. for 1933 Geol. Surv. of Uganda, 1934, paras. 62–74.Google Scholar

page 198 note 3 Combe, A. D., “The Geology of the Lubare Area, Western Ankole,” Bull. No. 3, Geol. Surv. of Uganda, 1937.Google Scholar

page 200 note 1 Combe, A. D., Ann. Sept. for 1932, Geol. Surv. of Uganda, 1933, paras. 157–160.Google Scholar