Coal has never been mined in Celebes. The only known deposits of some importance are situated in SW Celebes, NE of Mecassar. These coal-containing districts have been explored by the Government in 1913 and 1914.
The geological structure of Sumatra is mirorred on a small scale in the range of islands west of it. it is ummistakable that the tendency of the longitudinal chains of sumatra to subside to the SE is observable again on the long range of islands which lies paralel to sumatra in the SW, separated by a "longitudinal depression" which surpasses by widt…