735 
Now we leave South Sangkulirang and repair to the more northern 
antielinals, where we shall likewise find remarkable modifications 
of facies. 
The nuclei of the Southern and Northern Sampanju anticlinals are 
formed by the QOld-Miocene, that contains here remarkably little 
coal and limestone, but for the rest it is built up of the normal 
sandstones and shales. On the Western limb of these anticlinals we 
meet with the Miopliocene, in the South in entirely normal develop- 
ment, in the North with indications of Sampajau marls. 
On the Eastern limb we find on the strata of old-miocene like- 
wise miopliocene, partly in the normal development with soft clays, 
sands, gravel and dead black to brown coal. 
In higher parts follow then — in the neighbourhood of Sungei 
Labuan — between the normal rocks banks of Sampajau marls. In 
Batu and Batu Hidup anticlinal, rising more towards the East the 
types of the Sampajau marls and limestones obtain a much greater 
development, though they alternate in the Western limbs still with 
rather numerous seams of coal. On the Eastern limbs the develop- 
ment of the marly facies is still greater. Sandy clays and sands 
occur here still in fact, but the coal has almost disappeared. The 
youngest parts of the tertiary formation consist here of a complex 
„of sands and gravels, — as is likewise the case in the Sembulu 
anticlinal dipping down towards the North, near Sekurau and south- 
ward from the Sungei Mangenai. — We must mention that the 
miocene Gastropoda, which Kk. Martin’) described a few years ago 
from Sangkulirang were collected on the Batu Hidup anticlinal, whilst 
the fossils described by me from Sankulirang were found on the 
Gunung Batu anticlinal’). Whilst for these two faunas the age was 
determined as young miocene, or as transition between old and 
young miocene, W. Straus (l.c.) determined the age of the facial 
analogous fauna of Godang as pliocene. To a certain height these 
determinations of age are supported by the representation on the 
map: the strata of fossils of Gelingseh are situated on the farther- 
most anticlinals of the Sangkulirung region, the fauna of Godang 
was found in the deep synelinal region between the anticlinals of 
Maluwi and Sembulu and the anticlinals of North Sangkulirang. 
We have come to the end of our descriptions and give on the 
annexed table another geographical-stratigraphical sketch of the 
facial modifications in the tertiary formation of Sangkulirang. 
A few short considerations may be added to the facts described above. 
!) Samml. Geol. Reichsmus, Leiden. (I). 9. 1914, p. 325 e. s. 
*) Samml. Geol. Reichsmus, Leiden. (1), 9. 1914, p. 383 e. s. 
