The mapped area covers the sheets XXVIII, XXIX, XXXVIII and XXXIX of the topographycal map of south sumatra, scale 1:100.000. it can easily be reached by motor-car by the road from tanjoeng-karang to enggala, or by boat with the ships of the K.P.M via the Toelang bawang river to benggala.
Geological data concerning the area covered by this map sheet were not avallable before the beginning of the geological survey Verbex (1881,1) largely as alluvium and for a small part in the SW as marind diluvium, by hartman (1915,2)