Abstract
THE ages of carbonatites which occur within the Suregei–Asille Volcanics of northern Kenya cannot be obtained at present by directradioisotope dating, but can be derived from the 40Ar/39Ar K–Ar isochron ages of intercalated felsic ignimbrites. The Suregei–Asille Volcanics crop out over an area of some 1,000 km2 to the north-east of Lake Rudolf. They rest unconformably on the Precambrian basement and comprise several volcanic formations. The rock types include flood basalts; Strombolian cinder cones; aa- and pahaoehoe-flows varying in composition from ankaramitic basalt to trachyte; felsic air-fall and ash-flow deposits; lahars; carbonatite volcanics; and a variety of reworked volcanic ashes, volcaniclastic and fluviatile sediments.
This is a preview of subscription content, access via your institution
Access options
Subscribe to this journal
Receive 51 print issues and online access
$199.00 per year
only $3.90 per issue
Buy this article
- Purchase on Springer Link
- Instant access to full article PDF
Prices may be subject to local taxes which are calculated during checkout
Similar content being viewed by others
References
Watkins, R. T., J. geol. Soc. Land. (in the press).
Fitch, F. J., Miller, J. A., and Mitchell, J. G., in Time and Place in Orogeny, (edit. by Kent, P. E., et al). (Geol. Soc. Lond., London, 1969).
Harris, J., and Watkins, R. T., Nature, 252, 576 (1974).
Fitch, F. J., Findlater, I. C., Watkins, R. T., and Miller, J. A., Nature, 251, 213 (1974).
Fitch, F. J., and Miller, J. A., in Earliest Man and Environments in the Lake Rudolf basin: Stratigraphy, Palaeoecology, and Evolution (edit. by Coppens, Y., Howell, F. C., Issac, G. I., and Leakey, R. E.), (University of Chicago Press, Chicago 1975).
Fitch, F. J., and Vondra, C. F., ibid.
King, B. C., Mem. geol. Surv., Uganda, 5, 1–57 (1949).
Trendall, A. F., Rep. geol. Surv. Uganda, 12, 1–69 (1966).
Bishop, W. W., Miller, J. A., and Fitch, F. J., Am. J. Sci., 267, 669 (1969).
Fitch, F. J., Miller, J. A., and Hooker, P. J., J. Geol. Soc. Lond. (in the press).
Author information
Authors and Affiliations
Rights and permissions
About this article
Cite this article
FITCH, F., WATKINS, R. & MILLER, J. Age of a new carbonatite locality in northern Kenya. Nature 254, 581–583 (1975). https://doi.org/10.1038/254581a0
Received:
Accepted:
Published:
Issue Date:
DOI: https://doi.org/10.1038/254581a0
This article is cited by
Comments
By submitting a comment you agree to abide by our Terms and Community Guidelines. If you find something abusive or that does not comply with our terms or guidelines please flag it as inappropriate.
