CHIDEIIU HILLS. 253 



height of about 1,150 feet by a thick unconformable patch of coarse 

 conglomerate of much more recent aspect than the grey and o-i-eenish 

 tertiary sandstones underneath it, and probably of post-tertiary ao-e. 

 The escarpment of this conglomerate, which is more sandy below, forms 

 cliffs of nearly 100 feet close to the town of Namal, which is built upon 

 it, and a smaller portion of the same deposit, showing the uncon- 

 formity still better, rests above the opposite bank of the stream (see 

 Plate XXIX). 



The Bakh ravine here gives an interesting and complete section 



„ , , . through all the beds forming the narrowest part 



Baku ravine. ° ijo-xu 



of the range, from the carboniferous limestone 

 upwards. It is not, however, practicable to follow the stream the 

 whole way through the gorge, on account of the precipitous character 

 of its channel. On the Namal side the highest rooks seen are the 

 unconformable conglomerates just mentioned. Underneath these is a 

 thickness of 1,200 feet of grey and greenish tertiary sandstones, with 

 the usual argillaceous beds, dipping north-eastward at 60°, in immediate 

 and parallel contact with the upper surface of the nummulitic lime- 

 stone. Rather lower than half-way down in this limestone is a 

 strong band of black, coaly and pyritous shales (see fig. 47); and the 

 underlying part of the limestone is as usual lumpy and nodular. Just 

 at the base of the group are some beds filled with fossils of the Val Eonca 

 eocene type,^ very few of which can be extracted from the rocks. 



Below these are ferruginous white and purple sandstones, yellow 

 mud-stones, yellow earthy limestones and coarse sandstones of the 

 Jurassic rocks underlaid by the greenish shales and flaggy limestone 

 beds of the trias, the carboniferous limestone forming an anticlinal arch 

 below all. The section is as follows (see fig. 48, Plate XXVIII) : 



Feet, 

 13. POST-TEETI- > „, , 1 , 



AEY. j Strong sandy conglomerate ... ... ...80 to 100 



Unconformitt/. 



12. Tertiary \ Grey and green sandstone with some reddish and greenish > 



SANDSTONE.^ clay bands ... ... ... .,, > -^'^^^ 



* According to Dr. Waagen. 



( 253 j 



