Kokipie (Sagat Hill)
Kokipie (Sagat Hill) lies on the border with Uganda and is described under that country (Uganda No. 170-00-021).
Complete list of alkaline rocks and carbonatites
Kokipie (Sagat Hill) lies on the border with Uganda and is described under that country (Uganda No. 170-00-021).
Central Island in Lake Turkana is approximately circular, rises to 170 m and covers 9 km2, but the bathymetry indicates that the edifice widens to a diameter of about 5 km at a depth of 45 m beneath the lake surface (Dunkley et al., 1993).
Lying just south of the Ethiopian border in the Sabarei area (Key and Watkins, 1988) the Jibisa ring complex expresses itself as the 675 m high Jibisa Mountain.
The Puch Prasir Plateau, which lies essentially south of latitude 3°00’N, is a mountainous area surrounded by high cliffs and constititutes the southerly end of a dominantly rhyolitic group of hills that extend for nearly 100 km into the North Turkana area (No.
About 0.25 km2 of biotite-bearing nephelinite lavas cap Kekenye Hill and a smaller hill approximately 9 km to the east.
This large area extends around the southern reaches of Lake Turkana and includes numerous volcanic fields and centres many of which, but not all, are alkaline. Ochieng’ et al.
The Barrier volcano stands at the southern end of Lake Turkana and is so named because it separates the lake from the Suguta valley, the site of a former lake to the south. It forms an east-west-trending ridge 20 km in length and 15 km wide.
The eastern half of this huge area has not been investigated in detail but, as indicated on the 1:1,000,000 Geological Map of Kenya (1987), much of the area is covered by basaltic rocks.
Volcanic rocks mantle the eastern parts of these areas, which are described by Mason and Gibson (1957). They are continuous with the Maralal area (No. 085-00-011) to the east, which has been described in much fuller detail (Key, 1987).
The Report by Key (1987b) of the Maralal degree sheet area includes the work of Baker (1963) in the northeastern sector and Shackleton (1946b) for the southeast.