JABAL QAIYARAH. 19- 



the latter increasing and predominating as we ascend the series. 

 Near the mouth of a large water-course some seven miles S.S.W. 

 of the Qaiyarah military post, massive sandstones in which two dis- 

 tinct local unconformities are seen, belong to the uppermost hori- 

 zons of the lower of the two stages into which I have provisionally 

 divided the series ; overlying them, is the Conglomerate stage men- 

 tioned in the Jabal Hamrin report (' Nasaz zone "). 



Mesopotamian Alluvium. — The Mesopotamian Alluvium is more 

 argillaceous than it is south of Sharqat, and roads consequently 

 suffer more in bad weather. As usual it includes deposits of gravel 

 near the river and especially above the higher horizons of the series. 



New Alluvium. — The New Alluvium borders the river and ex- 

 tends up some of the larger wadis. 



Structure. 



The anticline is a simple, regular, very broad fold, extending in 

 a gently curved line with a general W.N.W — E.S.E. direction ; the 

 curve is that of a very flat reversed ' S,' the middle portion running 

 N.N.W.— S.S.E. There being no boat obtainable it was impos- 

 sible to cross the river and investigate what looked like a continua- 

 tion of the Fars outcrop flanked on the north by red clays and sand- 

 stones ; such a continuation is probable. 



From the Tigris the anticline rises distinctly to a crest maximum, 

 1-| miles west of the Oil Station. W.N.W. of this it pitches at an 

 angle which at first is about 1£°, but which soon becomes so small 

 as to be immeasurable, and a long stretch of almost horizontal crest 

 extends as far as the Qishlah hills ; there may be a W.N. W'ly 

 pitch along this stretch, but if so, it is extremely slight and 

 probably negligible. Within three or four miles of Qishlah Fort 

 there is a distinct rise which increases to something like 2J°. North- 

 west of Qishlah there is a pitch to the W.N.W., so that there is another 

 crest-maximum close to the Fort, probably a little higher than that 

 above Qaiyarah. The rise in the range seen four or five miles further 

 still to the W.N.W. no doubt indicates a further rise in the anticline, 

 and according to the map there are others beyond ; owing to trouble 

 with a local Sheikh I was unable to work on foot beyond Qishlah, 

 but by the courtesy of the Royal Air Force and kind intermedia- 

 tion of Col. Leachman, Political Officer, Mosul, I was taken 

 bv Lieut. Price for a flight over the Jabal Yawan. The anticlinal 



