70 
Records of the Geological Survey of India. 
[VOL. VIII. 
hope was based: direct evidence has been found of the underground continuation of this 
important series of rocks for some distance beyond the limits hitherto known; and an identifi¬ 
cation of Mahadcva rocks has been made far to the west on the Narbada near Barwai, which 
opens the question whether some of the so-called cretaceous sandstones along the valley of 
this river to near the coast may not belong to the same much older series, and thus 
be indicators of western coal-fields corresponding with those of the Damuda valley on 
the east. 
The Zumiui section. 
No observation has hitherto been made (or at least published) of any appearance to the west 
of Lokartalai of rocks closely connected with the coal-hearing series. At page 43 of my last report 
(1872) on the Satpura basin (Mem. Greol. Sur., Vnl. X) a brief notice is given of the western 
part of the northern boundary of the basin. The following remarks are in continuation of 
those there given. It was said that cast of Sali the metamorphics are in force along the 
boundary. This was hazarded on the strength of a small outcrop at Sali, and of their forming 
the principal part of the range twelve miles to the east on the high road north of Kesla. I 
find, however, that intermediately there is an important section in which the Mahadevas are 
continuous to the plains. It is 'south of Zumani in the Narbada 
valley, and north of Lalpani in the Tawa valley. Along the base 
of the hills north-west of Ivesla and Tako the Bagra limestone is in force, with a dip of 30° 
to north-north-west. The overlying sandstone and conglomerate with a low dip in the same 
direction form the scarp above. From the large and numerous blocks of trap at the foot of 
the waterfall there is probably an outlying cap of this rock on the hill. The crest of the 
pass north of Lalpani is on the southern ridge of the range, on the run of the high dip, 30° to 
north-north-westerly, in conglomeritic sandstone overlying limestone. There is probably 
some slip or sudden twist along the north of this ridge, for on the sloping high ground in 
that direction the strong limestone is again in force, with a low north-north-westerly dip. 
On the rise to the outer crest of the pass the overlying sandstone and conglomerates come in 
again. These breccia-conglomerates are splendidly exposed in the steep gorge to east of the 
road. In a spur near the mouth of this gorge there is a small Mahadeo rock-temple in the 
conglomeritic sandstone, having a dip of 3° to north-north-west. A little below this the dip 
rises rapidly to 40°, in hardened sandstone distinctly overlying the conglomerates; there is 
then a band of crushed rock and a trap dike, hut within about eighty yards apparently the 
same sandstones are again 30° to north-north-west, rapidly falling to 5°. The beds that 
come in here are peculiar: a whitish sandstqjje (which has been a good deal quarried), with 
partings of white shale and a layer of pyritous coaly shale. The character of these beds and 
their stratigraphical position at the top of a long ascending section of the Bagra group 
make it highly probable that they belong to the Jabalpur horizon, the nearest known 
position of which is capping Chatar hill sixty miles to eastward. When last seen in the 
stream under Jalpa the beds are quite flat, and end abruptly, with somo crushing, trap being 
the next rock seen. This is, perhaps, the most important section wo have of the north 
boundary, as it marks so clearly the upheaval of the Satpura area, or the depression 
of the Narbada valley, along it. It illustrates and explains somo of the sections to the cast, 
especially that on the Anjan (op. eit., p. 37). 
About six miles cast of Lokartalai there is a fme section of the boundary under the 
scaip of Budimai ridge. South of Batki the Bagra limestone 
Eudimai section. , 
appears in toree m the low ground at the base of the scarp, dip. 
ping at 30° to north-north-west, under the trap of the valley. Along the strike to the south¬ 
west of those outcrops the limestone disappears, but there is a much fuller section of this 
fringing zone of rocks. They form quite a flanking range outside the scarp, separated from 
it by a chain of small longitudinal valleys excavated along the broken uniclinal flexure, 
