dc.contributor.author | Olago, DO | |
dc.contributor.author | Street-Perrott, FA | |
dc.contributor.author | Perrott, RA | |
dc.contributor.author | Ivanovich, M | |
dc.contributor.author | Harkness, DD | |
dc.date.accessioned | 2013-06-30T11:41:05Z | |
dc.date.available | 2013-06-30T11:41:05Z | |
dc.date.issued | 2000-05 | |
dc.identifier.citation | Journal of African Earth Sciences Volume 30, Issue 4, May 2000, Pages 957–969 | en |
dc.identifier.uri | http://www.sciencedirect.com/science/article/pii/S0899536200000634 | |
dc.identifier.uri | http://erepository.uonbi.ac.ke:8080/xmlui/handle/123456789/42921 | |
dc.description.abstract | In this paper, a sequence of five Late Quaternary tephras occurring as discrete, well-preserved horizons in lake sediments on the northeastern flank of Mount Kenya are characterised and their ages determined by a combination of high-resolution indirect radiocarbon dating and direct View the MathML source dating. The grain size characteristics suggest that the tephras are of fairly local origin. These NaK-rich alkali pyroclasts with a trachytic chemical composition have a highly correlated chemistry and mineralogy, suggesting that they were probably derived from the same genetic series and possibly erupted from a single source vent. Morphological differences are attributed to the peculiar characteristics of each eruption episode. The magma source was probably a small, highly differentiated magma chamber following the olivine basalt-trachyandesite-trachyte-phonolite series, which broadly reflects the Quaternary rock suite of Mount Kenya. | en |
dc.language.iso | en | en |
dc.publisher | University of Nairobi | en |
dc.title | Late Quaternary primary tephras in Sacred Lake sediments, northeast Mount Kenya, Kenya | en |
dc.type | Article | en |
local.publisher | Department of Geology | en |