SOUTH-WESTERN PORTION OP KARACHI COLLECTORATE. 177 



thicker bands of limestone, dark and light-coloured, occur, evidently 

 belonging to the Khirthar group. 



The scarp of the Mol plateau was examined west-south-west of 



Scarp of Mol plateau Kand ' There a11 the lower portion of the cliff 

 near Kand. consists of Nari sandstone and some sandy lime- 



stone ; the Gaj beds come in about 600 feet above, and a thickness 

 of about 250 feet of them is exposed, consisting entirely of lime- 

 stone. The lowest bed, 30 to 40 feet thick, is yellowish-white in colour, 

 and abounds in Foraminifera and Echinodermata. One of the former is 

 an Orbitoides, undistinguishable by external characters from the Nari 

 O. papyracea ; a saddle-shaped variety occurs frequently. Amongst 

 the Echinodermata are Breynia carinata, Echiuolampas jacquemonti, a 

 Clypeaster, &c. The upper beds vary in colour, being white, yellow or 

 brown; some of the white limestones are nodular, as at Khadeji. 

 Echinodermata occur sparingly, and one layer is almost composed of 

 Orbitoides, the same as in the lower beds. 



The Mol plateau and the Myher plateau are precisely similar in height, 



and in being surrounded by a cliff -like scarp of 

 Kand valley. 



horizontal, or nearly horizontal, Gaj beds resting 



on Nari. The valley of the Kand Nai, about 3 miles broad, separates 



the two plateaus, and consists of nearly flat ground composed for a long 



distance of Nari beds, although farther south Gaj strata extend across. 



In the Kand valley the beds are not horizontal, but bend up in the 



middle to form an anticlinal with high dips, which become lower towards 



each side of the valley. (Plate VI, fig. 3.) 



A few miles farther south, and west of Thana Shah Beg (Got Tham 



Shah Beg), the upper part of the Mol scarp consist of Gaj beds higher 



in the group than those occurring east of Kand, there being in this 



part of the Mol plateau a gradual rise of the beds towards the north. 



The pale-coloured limestones, forming the upper part of the scarp near 



Kand, are, to the southward, covered by gritty arenaceous limestone 



with numerous fossils, amongst which some very beautiful and pei'fect 



specimens of Breynia carinata were found, together with Clypeaster, 



m ( 177 ) 



