225 
Beyond the “graben”, in the adjoining ‘“‘horsten”’, a slow upheaval 
of the land took place, in consequence of which the sea became 
shallower thus causing the growth of coralreefs upon the Globigerina- 
limestone. Foraminifera are found abundantly in these reefs whose 
preliminary determination points to a probable miocene age, although 
such an assumption must be confirmed by further palaeontological 
examination. Sometimes small pebbles are found in these reefs and 
in places thev pass into littoral conglomerates. It appears that coral- 
reefs have been formed continuously during the long period of slow 
upbeaval of these ‘“‘horsten’’. So in proportion to their age so they occur 
at different levels, the oldest or first formed lying in the highest 
level, those which are younger gradually somewhat lower. These reefs 
therefore form together a slowly sloping more or less terraced covering 
or coating of coral-limestone. The entire thickness of this neogene 
formation from beyond the basins does not exceed 60 Meters. 
Inside the “graben” where the neogene beds attain a much greater 
thickness, elements of terrigenous origin make their appearance in 
the upper portion of the Globigerina deposit and gradually it passes 
OS ae aN i 
zen | 
Fig. 1. Sketchmap showing the area covered by the later-tertiary 
deposits in Middle-Timor. Scale 1 : 2.560.000 
it may be as well to explain that in case adjoining strips of land are affected by 
antagonistic movements and are separated one from the other by faults, the down- 
thrown strips or blocks are called “graben”, whereas the upthrown strips or blocks 
are called “horsten’”’. 
