THE BASALT STRATIGRAPHY OF THE SANI PASS, KWAZULU NATAL DRAKENSBERG/

The Sani Pass, on Lesotho's eastern border with South Africa, provides access to an approximately 800 m-thick section through Jurassic basal t lavas of the Karoo Central Province. Field mapping and geochemical c haracterization have allowed the subdivision of the basalts into a ser ies of four compositionally distinct stratigraphic units in the lowerm ost 175 m of the sequence, overlain by a thick (approximately 625 m) s uccession of basalts that correlate with the Lesotho basalt type, whic h occurs over wide areas of the Karoo Central Province. The lowermost lava units are intercalated with isolated thin bands of pyroclastic ma terial.