Mathu, Eliud M.; Onyancha, Caroline K.; Mwea, Sixtus K.; Ngecu, Wilson M.
(Academic Research Publishing Agency Network 9 (2) November 2011, 2011-11)
Nairobi City is mainly underlain by pyroclastic volcanic rocks that were deposited during the formation of the East African Rift Valley. Some of the volcanic rocks were deposited in aqueous conditions over a long period ...