288 PROCEEDINGS OF THE GEOLOGICAL SOCIETY. 



loured flint, chiefly black. The limestone is exceedingly hard and 

 compact, breaks with a conchoidal fracture, and emits a highly bitu- 

 minous odour when struck. It is unfossiliterous. 



A saddle is formed by the curvature of the beds, the continuity of 

 which is, however, broken at the summit. At the centre a good deal of 

 zigzag contortion is perceptible in the lower beds ; but this gradually 

 becomes less, and eventually dies out in the upper beds. The dip on 

 the south is at an angle of 37°, and on the north 25°. 



On quitting Khorremabad in a N.W. direction the stratification in 

 the valley of the river which waters the town is concealed under 

 loose gravel ; but, about half-way to Robat a considerable range of 

 gravel-conglomerate is crossed, dipping to the N.N.E., at an angle of 

 68°. Tt is almost entirely composed of red and coloured chert-peb- 

 bles, moderately rounded, and not exceeding six inches in diameter. 

 The red cherts are by far the more abundant. Limestone-pebbles 

 are rare. The matrix is a reddish calcareous sand, very hard. This 

 conglomerate is overlaid by a thin bed of light-grey crystalline lime- 

 stone, in which was observed a specimen of the Pul i Tang species 

 of Scutella. 



The chert-conglomerate and grey limestone, I conceive, may re- 

 present the lowest part of 3 « and 3 6 of the Mungerrah Section, 

 p. 272, and fig. 8, p. 331. 



The stratification between Robat and Bisiitiin is much disturbed, 

 and the rapidity of our march across it was not favourable to geo- 

 logical investigation. There were noticed, however, several bands of 

 iron-stone. 



In describing the section fig. 4 (pp. 264 & 274), I have hinted the 

 probability that the blue bituminous shales and marls (4 d) between 

 Tang i Khashow and Deh 1 Liz belong to the cretaceous series. 

 Their position with regard to the overlying reddish sandstones (4 c), 

 containing bands of iron-stone, beneath the nummulitic limestone, as 

 well as their striking resemblance to similar beds at Kalah Kazi 

 (p. 276, 4 a in fig. 9, p. 332) Zohab, and the Bakhtiyari section 

 (p. 284, 4 b, fig. 11, p. 334), certainly favour this conclusion. 



The next point in a S.E. direction at which I met with cretaceous 

 rocks is the Kilgird Range, on the Kiiran, between Mai A'mir and 

 Siisan, in the Bakhtiyari Mountains. This range is of a light-grey, 

 compact, and sometimes crystalline limestone, containing Ammonites, 

 — a small plicated Ostrea, — a Venus, — and turbinated and turrited 

 Univalves. The beds are much crushed and contorted, but dip 

 generally to the S.W., as is evident in the ascent of the Pass from 

 Mai A'mir, where their surface is so smooth and slippery as to render 

 it a most difficult task for either man or beast to stand upon his legs. 



Still further south-eastward, between Kalah Tiil and Isfahan, we 

 have the well-developed Section (fig. 11, p. 334), which so admirably 

 exposes the various beds between the Sphserulitic limestone and the 

 Nummulitic Rocks. 



The most south-easterly point reached by our Commission was 

 Madre i Siileiman (the Pasargadse of the Greeks), at which place the 

 ruined Kaaba is built of a yellowish -white fine-grained marble, con- 



