| dc.description.abstract | A survey of the geology, tectonics -and structural
setting of an area of about 880 square kilometres in the
northeast portion of the Nyanza rift valley is presented
as primary data in understanding the palaeolandscape
preserved beneath the ambo and Kisumu Phonolite Formations.
It is concluded that this part of the rift started to form
In the middle Miocene and became more prominent in late
Pliocene-early Pleistocene period .
.1"'"\
fne more important of the studies concerning previous
geological reports, and the various hypotheses of the rift
are critically examined. Their role in the understanding
of the genesis and evolution of the northeast part of the
Nyanza rift valley is rev i ewed-,- The distribution of the
ambo and Kisumu Phonolite Formations is described and their
..
order is established from field evidence. The fossiliferous
Miocene sediments and the Pleistocene deposits are discussed. | en |
