BETWEEN QARAH TAPPAH AND TABLE -MOUNTAIN. (53 



zone " e." Two miles south of this the hills of Jabal Gilabat com- 

 mence to rise from the plain. The Jabal Gilabat consists of a 

 faulted anticline extending N.W. — S.E. and pitching steadily and very 

 gently south-eastwards towards a point three miles north of Qarah 

 Tappah (see map, pi. 9). As the geological map shows, the lowest 

 beds exposed are the sandstones of zone " b " belonging to the Kurd 

 series. Near Kahriz Atiq the outcrop of this zone is about three- 

 quarters of a mile wide ; south-eastwards it narrows and disappears 

 about two miles past Abu Alaik. To the north-east, the beds of this 

 zone " b '" pass up into the brown clays of zone " c " and these in 

 turn into the conglomerates of zone " d " which form the scarp 

 of the Jabal Gilabat proper. South-westwards, however, zone " b " 

 is cut off by a strike fault which brings it up abruptly against 

 zone " c." This fault, whose down-throw is on the south-west, 

 dies out in the direction of pitch of the anticline about two- 

 and-a-half miles from Abu Alaik. It occurs very close to the anti- 

 clinal crest. In the south-western limb of the anticline the con- 

 glomeratic zone " d " is apparently so poorly developed as to 

 have been covered completely by alluvium up to a point two 

 miles from Yalghuz, where it makes its appearance in the form of 

 a narrow line of low mound-like hills. North of Qarah Tappah it 

 is well exposed, its beds curving in broad concentric horse-shoes 

 from one flank to the other. East of Qarah Tappah the anticline 

 apparently rises again. In the transverse section sketched the 

 fault is assumed to hade towards the down-throw, but no indica- 

 tion of the hade was seen. 



Sulphur and oil. — A sulphur spring accompanied by the odour 

 of petroleum is reported to occur a mile north-west of Abu Alaik, 

 and is used for bathing purposes. The spring was not actuallv 

 seen, but there is no doubt that it occurs on the fault (see sec- 

 tion on pi. 9). In view of this fault along or very close to the 

 crest the prospects of obtaining oil by boring are most uncertain. 

 The only chances of success depend upon the possibility that small 

 patches of the crest sufficiently arched to retain a little oil may 

 remain, or that oil in some places may have been sealed off against 

 the fault by a clay band. Boring would have to be deep. My 

 examination was too cursory to permit of a decided opinion, but 

 the risk of failure would certainly be great. 



16th April, 1919. 



