444 
There is in the Dutch East-Indies another oil-field of little impor- 
tance in the island of Ceram, which probably dates from Mesozoic 
time. Its age, however, has not been quite proved. Another oil-field 
again, genetically closely connected with the Tertiary terranes men- 
tioned above, is found in the East-Indian Archipelago outside of the 
Dutch possessions. It is the Tertiary oil-field situated in British North- 
Borneo and Serawak along the coast of the China Sea. 
These latter territories will here be left out of consideration. 
[. Kast- Borneo. 
The geosynclinal belt G lies at the east coast of Borneo, along 
the strait of Macassar. 
kig. 2. 
Black vertical lining: Neogene geosynclinal deposits, in which the occurrence of 
petroleum has not yet been established. 
Solid black: Oilfields in Neogene geosynclinal deposits. 
Dots: The dotted area represents the Sunda shelf; together with 
Malacca, Sumatra, Java and Borneo it indicates the 
largest extension of the Sunda Land in Pleistocene time. 
The continental or primary area of denudation ZL is Borneo, the 
sea S is the Strait of Macassar, and between these two the Tertiary geo- 
