Preliminary results of detailed mapping in Area 2515 (Awasib) are presented. The area consists of a variety of igneous and sedimentary lithostratigraphic units most of which are considered to be equivalents of the Sinclair Sequence whereas the others are considered as basement to the former, possibly to be associated with the Namaqualand Metamorphic Complex. The terrain is situated just to the west of the type area of the Sinclair Sequence but separated from it by outcrops of basement rocks (Kumbis Complex), and it is not possible to trace stratigraphic units occurring there into the study area. However, several lithologic units, especially plutonic and sedimentary rocks, distinctly resemble certain units of the Sinclair Sequence, and have been correlated with these. On the other hand, some plutonic and volcanic assemblages display both a higher degree of deformation and metamorphism than would be expected from Sinclair rocks, and their inclusion in the Sinclair Sequence is in some doubt.