GEOLOGICAL SOCIETY OF LONDON. 
127 
in depth. The clay then loses its colour and continues to a 
depth of 75 feet, the lower portion of it furnishing nodules of 
Kankur. At 75 feet a bed of variegated sandy or arenaceous 
clay commences^ and continues to the depth of 120 feet, occa- 
sionally traversed by horizontal beds of Kankur. Beneath this 
is a stratum of argillaceous marl 5 feet in thickness, and succeed- 
ing it there is a bed only 3 feet in thickness of loose friable 
sandstone, the particles of sand being held loosely together Dy a 
clayey cement. Argillaceous marl 20 feet in thickness follows 
the sandstone, terminating at the depth of 150 feet, when it 
passes into an arenaceous clay intermixed with water-worn no- 
dules of hydrated oxide of iron. Weathered mica slate is found 
attached to the clay of this bed, and throughout the entire range 
of strata penetrated, scales of mica have always been met with. 
At 175 feet a coarse friable quartzose conglomerate occurs, com- 
posed of pebbles of different sizes, though none are very large, 
cemented together by clay. At 177 feet this conglomerate be- 
comes smaller grained; and at 183 feet 3 inches it is found to 
pass into indurated ferruginous clay, which continues, with but 
little variation, to a depth of 208 feet. Here another layer of 
sandstone, soft in its upper portion, but becoming more indu- 
rated and assuming the lamellar structure, as if it passed through, 
occurs; the thickness being, however, no more than 3 feet. 
Ferruginous sand with thin beds of calcareous and arenaceous 
clay prevail from 208 feet to 380. Kankur, with minute water- 
worn fragments of quartz, felspar, granite, and other indications 
of debris from primary rocks are met with in the lower parts of 
this sandy deposit, in which were also found three fragments of 
bones, of which one was considered by Mr. J. Prinsep to be the 
lower half of a humerus of some small quadruped like a dog, 
and another the fragments of the carapace of a turtle. At 380 
feet there occurred a thin layer, only two feet in thickness, of 
blue calcareous clay, thickly studded with fragments of shells, 
and at 382 feet this was succeeded by a layer of dark clay, com- 
