The Turkana Basin preserves a long and detailed record of biotic evolution, cultural development, and rift valley geology in its sedimentary strata. Before the formation of the modern basin, Cretaceous fluvial systems, Paleogene lakes, and Oligo-Miocene volcano-sedimentary sequences left fossil-bearing strata in the region. These deposits were in part related to an early system of rift basins t...

The Ethiopian Rift Valley hosts the longest record of human co-existence with volcanoes on Earth, however, current understanding of the magnitude and timing of large explosive eruptions in this region is poor. Detailed records of volcanism are essential for interpreting the palaeoenvironments occupied by our hominin ancestors; and also for evaluating the volcanic hazards posed to the 10 million...

Dike emplacement in volcanic rift zones is often associated with the injection of “bladelike” dikes, which propagate long distances parallel to the rift, but frequently remain trapped at depth and erupt only near the tip of the dike. Over geologic time, this style of dike injection implies that a greater percentage of extension is accommodated by magma accretion at depth than near the surface. ...

Ahstract. Selected North American mosquito species were evaluated as potential vectors I of Rift Valley fever virus. Field Populations of .1edes canadensis Ae. camawr, A(. everu' tans. .,ie. so[iitans, .e. tae'tlorh Iteh,. .ic. trseratus. .1 ntophwk' hradleti-crucians, ( u/c. alinariis. (vtursais. and (V. erritanS perorally exposed to 10"'-10-plaque forming units of Rift ValLv fever virus rcd.J...

A Rift Valley fever (RVF) outbreak in humans and animals occurred in Mauritania in 2010. Thirty cases of RVF in humans and 3 deaths were identified. RVFV isolates were recovered from humans, camels, sheep, goats, and Culex antennatus mosquitoes. Phylogenetic analysis of isolates indicated a virus origin from western Africa.

Those components of climate that are likely to have major effects upon the geographical distribution, seasonal incidence and prevalence of vector-borne diseases are described. On the basis of existing and predicted climatic variations, examples are given of the types of changes that are to be expected, using several internationally important human and animal arboviral diseases including Rift Va...

An outbreak of Rift Valley fever in the Kingdom of Saudi Arabia and Yemen in 2000 was the first recognized occurrence of the illness outside of Africa and Madagascar. An assessment of potential mosquito vectors in the region yielded an isolate from Aedes vexans arabiensis, most closely related to strains from Madagascar (1991) and Kenya (1997).