227 
“oraben”. One of the coralreefs in the Benain-basin (fig. 2) is of 
great thiekness (70 Meters) and of considerable extension, being con- 
sequently an element of importance in the configuration of the land- 
615. 26 
6 
Ls 
<= AES. MRS eee 6 SP re i 
c —~ — _ 5 AI 5 
NON et 
WNW = EE A TT ere 3 OZ) 
is 
Fig. 2. Section across a portion of the Benain-basin in Middle-Timor. 
Claystone and marl with shells, Pliocene. 
. Marls and sandy marls, containing in places marine organisms, 
. Conglomerate. 
Sandy marl with Placunna. 
Coralreefs, late-Pliocene or Pleistocene. 
Oysterbanks. 
Scale. 1 : 14.000. Altitudes in Metres above sealevel. 
peter 
scape; on these coralreefs is again deposited a succession of layers 
of sandstone, conglomerates, oysterbanks, ete., all significant of a 
littoral origin. From tbeir considerable thickness we must infer that 
these deposits were formed during a period of slow subsidence, which 
must have occurred at the end of the pliocene or at the beginning 
of the pleistocene age. 
These reefs and other littoral deposits although getting thinner 
towards the edges (walls) of the basins, are not always confined to 
the ‘graben’, but in places they spread over a great area in Middle- 
Timor and overlap the older formations from which they are often 
separated by a well developed coarse basal conglomerate ; conse- 
quently they are also found resting unconformably upon the Globi- 
gerina-deposits where the latter are locally tilted at the edges of the 
“oraben’. It is obvious that these coralreefs of late-pliocene or 
early-pleistocene age have been formed outside the ‘graben’ in close 
proximity, although generally at a somewhat lower level, to the 
above-mentioned older reefs of probable miocene and pliocene age. 
It was not proved possible to discriminate in the field between these 
reefs of different ages, with certainty, but probably a future exami- 
nation of the Foraminifera contained in them may lead to more 
accurate results. 
In the “graben” there is no break in the succession or unconfor- 
mity visible between the pliocene strata and the overlying reefs and 
