Shield making in Western Kenya
The Precambrian Kisii Series in Western Kenya is unmetamorphosed and contains andesites, rhyolites, quartzites and basalts. The basalts, for which a minimum K-Ar age of 930 My is cited, were sampled at 15 sites, and after A.F. treatment nine sites yielded a stable palaeomagnetic direction which is b...
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ftunivnairobi:oai:http://erepository.uonbi.ac.ke:11295/15867 2023-05-15T18:22:22+02:00 Shield making in Western Kenya Onyango, Walter H 1971 application/pdf http://hdl.handle.net/11295/15867 en eng http://hdl.handle.net/11295/15867 Article 1971 ftunivnairobi 2022-12-28T09:11:01Z The Precambrian Kisii Series in Western Kenya is unmetamorphosed and contains andesites, rhyolites, quartzites and basalts. The basalts, for which a minimum K-Ar age of 930 My is cited, were sampled at 15 sites, and after A.F. treatment nine sites yielded a stable palaeomagnetic direction which is believed to be primary. The mean direction (N= 9) after tilt correction is D= 99°, I=−59°, α= 10°, and the corresponding palaeomagnetic south pole is at 6° N, 12° W with A95= 14°. This pole lies close to several other poles for Africa but it is of a very different age and it cannot be correlated with them. Instead it is suggested that the Kisii pole must form part of a previously undefined polar wander path for the Late Precambrian of Africa proposed in an accompanying paper by Brock and Piper. Article in Journal/Newspaper South pole University of Nairobi Digital Repository South Pole |
institution |
Open Polar |
collection |
University of Nairobi Digital Repository |
op_collection_id |
ftunivnairobi |
language |
English |
description |
The Precambrian Kisii Series in Western Kenya is unmetamorphosed and contains andesites, rhyolites, quartzites and basalts. The basalts, for which a minimum K-Ar age of 930 My is cited, were sampled at 15 sites, and after A.F. treatment nine sites yielded a stable palaeomagnetic direction which is believed to be primary. The mean direction (N= 9) after tilt correction is D= 99°, I=−59°, α= 10°, and the corresponding palaeomagnetic south pole is at 6° N, 12° W with A95= 14°. This pole lies close to several other poles for Africa but it is of a very different age and it cannot be correlated with them. Instead it is suggested that the Kisii pole must form part of a previously undefined polar wander path for the Late Precambrian of Africa proposed in an accompanying paper by Brock and Piper. |
format |
Article in Journal/Newspaper |
author |
Onyango, Walter H |
spellingShingle |
Onyango, Walter H Shield making in Western Kenya |
author_facet |
Onyango, Walter H |
author_sort |
Onyango, Walter H |
title |
Shield making in Western Kenya |
title_short |
Shield making in Western Kenya |
title_full |
Shield making in Western Kenya |
title_fullStr |
Shield making in Western Kenya |
title_full_unstemmed |
Shield making in Western Kenya |
title_sort |
shield making in western kenya |
publishDate |
1971 |
url |
http://hdl.handle.net/11295/15867 |
geographic |
South Pole |
geographic_facet |
South Pole |
genre |
South pole |
genre_facet |
South pole |
op_relation |
http://hdl.handle.net/11295/15867 |
_version_ |
1766201765897699328 |