6 4 PASCOE: GEOLOGICAL NOTES ON MESOPOTAMIA. 



REPORT No. 14.— NOTES ON THE JABAL HAMRIN BETWEEN 

 QARAH TAPPAH AND TABLE MOUNTAIN. 



Maps.— 1 inch = 1 mile. PI. 10. 



Ain Lailah Pass. 



Opposite Qarah Tappah the crest of the Hamrin Range consists, 

 not of anticlinally folded Fars beds as it does near the Tigris, but 

 of a scarp of the conglomeratic zone " d " of the Kurd series. 

 The conglomerates of this zone, reinforced along the main ridge by 

 a thick band of sandstone, dip at about 5° towards the north-east, 

 disappearing beneath alluvium which probably covers the clays 

 of zone " e." On the south-west side of the range the conglomerates 

 are seen to overlie brown clays of zone " c " and these in turn 

 sandstones of zone " b," all clipping gently and normally in a 

 north-easterly direction. 



Sakaltutan Pass. 



Over the Sakaltutan Pass the dip in the conglomerates rises to 

 10°, and in the sandstones to 16°, but it waves a little in the latter 

 {see map, pi. 10). Opposite Khalaf-al -Quran it was seen that the 

 Kurd beds form the north-eastern limb of a N.W.— S.E. anticline, 

 which is here pitching towards the north-west, the crest lying very 

 close to the road. This crest is sharp and the anticline asymmetric, 

 the south-westerly, dips rising to 50° and more. 



Table Mountain. 



Introduction.— Opposite Mansuriyah the anticline is well exposed 

 and pitches south-eastwards to the small pass over the hills, east of 

 the town. It rises again towards the river and probably reaches a 

 crest-maximum somewhere in Table Mountain ; south-east of Helio 

 Hill it is seen pitching south-eastwards. Both limbs of the fold 

 are represented on each bank of the river, though not much of the 

 south-western limb has escaped concealment beneath the alluvium. 

 North-easterly dips rise to about 18° and south-westerly to 90,° 

 but there may be slight reversal of the latter limb beneath the 

 alluvium. 



Pout-Tertiary gravel. — The most interesting feature of the Table 

 Mountain area is the post-Tertiary gravel and silt lying uncon- 

 formably upon the Tertiaries in the vicinity of the river and on 



