286 PROCEEDINGS OF THE GEOLOGICAL SOCIETY. 



to the underlying series. Near the valley of Khosrauabad, at the 

 foot of the Tauk-i-Girrah Pass, however, a long low hill rises from 

 the level of the plain and extends towards the N.W. It forms a 

 saddle of cream-coloured lithographic limestone, which is compact, 

 hard, and sometimes crystalline, and consists of innumerable thin 

 layers which easily separate by a blow with a hammer. It contains 

 thin tabular beds of milky-white or blackish flint. As the beds of 

 the surrounding ranges all dip from the plain at a slight angle, and 

 as the lithographic limestone apparently is the axis of elevation, there 

 is every reason to conclude that the Nummulitic limestone rests con- 

 formably upon it, especially as in the neighbouring locality of Kiih- 

 i-Bizenan this is undoubtedly the case. 



The limestone contains crushed specimens of 



Turrilites ; resembling T. tuherculatus. 



Belemnites. (p 



Ammonites ; one of them 2\ feet in diameter. [ ^^ ®* 



A. planulatus, Sow. {A. MayorianuSy D'Orb.)J 



Pecten. 



Turrited Univalve. 



Fuci. 



I have already alluded (p. 279) to the section exposed by the cleft 

 along the axis of Kuh-i-Bizenan, a few miles to the N.W. of the last 

 section. The cream-coloured hmestones are there of considerable 

 thickness, devoid of fossils, but undoubtedly overlaid conformably by 

 nummulitic rocks. 



At other localities a somewhat different order prevails, and thick 

 deposits of blue bituminous marls occur between the nummulitic and 

 cream-coloured limestones, as at the base of Kuh-i-Dalahu, east of 

 Zohab. 



This is especially observable in the Kirrind and Mahidesht section 

 (p. 2/5, and fig. 9, p. 332), in which the following apparently conform- 

 able order of superposition at Kalah Kazi has been noticed. 



7. (3 g.) Compact, hard, arenaceous, grey, and white limestone, in 

 thick layers ; of the Nummulitic series. 



9. (4 a and 4 «*.) Schistose, bituminous, grey or dark-blue, indu- 

 rated, calcareous marls, and fissile clays, 



10. (4 b.) Cream-coloured limestone, splitting into very thin layers, 

 sometimes with crystalline, arenaceous, and sonorous bands ; 

 traversed by veins of quartz. 



The beds 3 g and 4 b agree in so remarkable a manner with the 

 beds 4 6?, 4 5, 4 « of the Bakhtiyari section (p. 284, and fig. 1 1, p. 334) 

 as to lithological character, that they may be recognized at a glance. 

 They are very largely developed, and from Gawarah their course is well 

 marked by the valley of the Ab-i-Zumikan, which flows along their 

 line of junction. Towards theN.W. the beds gradually sink down into 

 the plain of Bivanij, where they are covered by a thin layer of alluvial 

 soil ; and, after passing under the mass of the Dalahu range, they 

 again appear, as before stated (p. 2/8), in the wild hills east of Zohab ; 



