Following the 3D remote sensing study of the Bogoria area, Central Kenya Rift, by GRIMAUD ef al. (1994), a similar morphostructural study also using SPOT satellite imagery and a Digital Elevation Model (DEM) was undertaken for the Baringo -Marigat-Loboi area, directly north of Bogoria. This morphostructural analysis was completed through fieldwork. To begin with, the different types oi tectonic structures were observed at various scales in order to determine tile extension mechanisms of the ＇＇Baringo-Bogoria half-graben＇＇, which lies al the intersection of the N 140 degrees Proterozoic Aswa shear zone and the Kenya Rift which generally follows a N-S direction, The general structural framework of the Baringo area has been defined, involving three major regional tectonic trends: N 0-10 degrees, N 150 degrees, and N 50 degrees, interference of these trends at different scales within the Baringo area has produced several types of sigmoidal, S- and Z-shaped structures which define transverse zones with left-lateral and right-lateral component movements. The combination of these lateral component movements with major normal movements on meridian faults is in agreement with a local N 90 degrees direction of extension. These transverse zones seem to have been a major influence on the location of several volcanoes within the Baringo-Bogoria area. These belong to a linear N 0 degrees-trending array of Pliocene to Recent volcanoes all located along the rift axis. These volcanoes show regular spacing and good correlation with N 150 degrees transverse zones inherited from the ancient Aswa shear zone of the Proterozoic age. These observations clearly indicate that interactions-exist between the rift thermal history and the brittle deformation at shallow depth. The 3D study of the geometry of border faults and their associated alluvial fans of the Baringo area confirms a typical east-dipping half-graben structure for the Baringo - Marigat-Loboi Basin, and for the Bogoria Basin. The influence of the transverse zones led to the segmentation of two individual basins: (1) the rhomb-shaped, ＇＇flexured＇＇ Baringo Basin, 50 km long and 20 km wide, and 1 km deep; this is bounded to the east and west by major N O-10 degrees faults, and to the north and south by flexural zones superimposed on two N 150 degrees transverse zones; (2) the giant ＇＇grid-fault basin＇＇ of Bogoria, 20 km long x 5 km wide. Modern sedimentation in the Baringo and Bogoria Basins is briefly considered in terms of its significance for the petroleum potential of similar rift basins.