This revised book gives a detailed well-log, seismic and gravity data interpretations of the Chalbi, Lake Turkana, Lokichar-North Kerio and Lotikipi sub-basins. It prognostically evaluates probable sites for oil and gas potential in the northwest Kenya Rift Basin systems. Its user-friendly text enables students pursuing graduate courses in geology, geophysics, geochemistry, mining, petroleum engineering and environmental science (which constitute the discipline of Earth Science) to comprehend, with comparative ease, the petroleum prospectivity in this part of Kenya where substantial oil and gas discoveries have recently been made by international oil companies. Besides its simplicity, the book is replete with geological, geophysical and geochemical information which students, researchers and professionals should find both stimulating and useful.