paht 2.] 
llacket: Count rtf near Gwalior. 
39 
The variety of trap forming the different spreads is diorite. It is mostly largely 
crystalline, the separate crystals of hornblende and felspar being visible to the naked eye. 
On the top of the Morar trap near Beipoor magnetic iron is very abundant in the 
trap, but with this exception there is little variety in the trap of the different spreads. 
The VrNDiiYA.v Sebies. 
Already described .—The western part of our area is occupied by the rocks of the 
Upper Yiudhyan series. This formation, including that portion of it here represented, has 
already been reported upon by Mr. Mallet, (Mem. Geol. Surv., India, Vol. VII., Pt. 1). 
Relation to Gwalior.—1 shall therefore confine my remarks to its relation to the 
Gwalior, and, principally, to showing the extensive denudation of the latter previously to the 
deposition of the former. Only the two lower groups of the Upper Vindhyans, viz., the 
Kymore and Rewah, are here represented; they form three parallel ranges, extending 
from the south in a north and south direction, but north of the Par scarp they trend to the 
north-east. The most easterly range is formed of the Kymore conglomerate and sandstone ; 
the next-a few miles to the west-of the shales and sandstone of the Lower Rewahs, and the 
third-still farther west-of the shales and sandstone of the Upper Rewahs. 
Outliers .—There are also many outliers of the Kymore group resting upon the Gwaliors ; 
one of the largest of these is the Gwalior fort hill, the upper half of which is formed of the 
Kymore rocks. 
Unconformity .—The Kymore cross the whole of the Gwalior section, and along the line 
of junction numerous sections of the unconformity of the two series are exposed. 
Kymore conglomerate .—Further evidence of the unconformity is shown by the Kymore 
conglomerate, which is formed, almost entirely, where it crosses the Gwaliors, of angular 
and slightly rolled pebbles of red jasper obviously derived from these. 
Doorsari .—But the most interesting sections of the junction of the two series occur 
in the two gorges near Doorsari at Ladera and near Bhastori. These sections not 
only show the extensive denudation of the Gwaliors, but also that their present physical 
features, as, for instance, the Par scarp and the two parallel valleys, existed before the depo¬ 
sition of the Vindhyans. 
The Doorsari gorge is situated at the western end of the Par scarp about a mile 
beyond the western limits of the map. South of the Par scarp the Kymores rest directly 
on the gneiss and form a scarp running nearly north and south. The section is at the point 
of contact with the north and south scarp and the Par east and west scarp. The two scarps 
are each about 200 feet high. The Par scarp is formed of about 1(50 feet of gneiss capped 
by 50 feet of Par quartzite. The Kymore scarp a few hundred yards from the contact has 
about the same thickness of gneiss at base, but capped by the Kymore conglomerate and 
sandstone. At this point, the conglomerate is only a few feet thick ; north of this, the top 
of the gneiss falls rapidly to nearly the level of the plain, and its place in the scarp is filled by 
the Kymore conglomerate. At the point of contact of the two scarps, there cannot be less 
than a hundred feet of the conglomerate resting against the steep Par scarp. At the top 
of the Par scarp, the conglomerate is only represented by a few pebbles, but it gradually 
thickens on the low ground to the north. 
a 
Junction ol the Vindhyan and Par scarps near Doorsari: a —Kymore sandstone; 6—Kymore conglomerate 
c —Par sandstone ; d —Gneiss 
