38 Records of the Geological Surrey of India. j vol. tii. 
of these patches are parts of the four great spreads, although the connection cannot be traced, 
as these parts of the section are a good deal covered by the "alluvium. 
Morar trap. —The Moral- trap is by far the most important from its greater thickness 
and extension along the strike. A map would scarcely convey a correct idea of its great extent 
ami thickness ; as to the eastwards the trap is only seen at the base of the broken northern 
range and in the isolated hills dotting the Morar plain; but there can be no doubt, these 
isolated patches, and the trap under the hills round Gwalior, form part of one great spread, 
extending from Bitholi on the west to Jhankri on the east, a distance of about 30 miles. 
The western end of the Morar trap is covered by the Kymore sandstone, and the eastern 
by the alluvium. There does not appear to be any thinning out at either end, for at Bitholi 
and Jhankri there is as great a thickness as anywhere along the line. About four miles west 
of Bitholi, in a gorge near Malipoora, the Kymore sandstone is removed and a considerable 
thickness of trap is exposed. This is just in the'line of the strike of the Morar trap and 
most probably is a continuation of it. 
Thickness. —The thickness of this trap must ho considerable, although it is difficult to 
estimate it accurately. The breadth of the spread, at right angles to the strike, is at the 
western end upwards of three miles. The rocks immediately above and below the trap dip 
at an angle of 2°, and if the trap has the same dip, it must he upwards of 500 feet thick. 
But as there may he an alteration in dip between the northern and southern edges, this 
estimate is possibly excessive. At all events, there arc vertical sections exposed in (iwalior 
fort hill, and some of the hills to the west, showing nearly 200 feet of trap, and some of 
the hills on the Morar plain, as at Dhaneli, Atarsoo, and' Karwas, are nearly 100 feet 
high and are formed entirely of trap. 
Sarai trap. —The Barai trap occurs on the south side of Baraj hill. It extends to the 
east nearly as far as Tigara, where it. is covered by the alluvium, and on the west for a mile, 
and is then covered by the Kymore sandstone. There is about, 50 feet of this trap exposed 
in the Barai hill. The small patches of trap, which crop out from under the Kymore sand¬ 
stone, south-west of Barai. arc obviously parts of this spread. The reason of its occurring 
in detached patches is, that the trap was largely denuded before the deposition of the 
VnidhyatiH. and that now, the Kymm-e sandstone rests sometimes on the trap and at others 
on the rocks below. 
P-imiar.— The trap at Puniar is about 1$- miles south of the southern edge of the 
Barai trap, and of which, although the continuation cannot now he traced, it probably once 
formed a part. The traps arc of about an equal thickness, and the beds above and below 
them arc very similar. 
Choura trap. —The Chonra trap is about 70 feet thick, and extends eontinuouslv 
from Naigaon. just east of the trunk road, to Choura. East, of this, it is covered by the 
alluvium, hut its continuation can be traced some distance further oast, as small hillocks of 
trap arc of frequent occurrence in that direction. It is probable that the trap seen in 
the stream north of Barori is a continuation of this spread, as the limestone on the top 
of it is very similar to that over the Choura trap. 
Its continuation westwards can also be traced, for in the nuddy south of Raipoor. 
about two miles west of Naigaon, a small patch of trap is exposed, which is probably a 
part of this spread. 
Bela Trap. —The Bela trap is about 160 feet higher in the section than the Choura. 
II. is covered by the alluvium at both the east and west ends, hut to the eastwards, there 
are many outcrops of trap along this line, the farthest of which is at Kote ki Serai, about 
six miles distant; these all doubtless belong to this spread. 
At the northern end of this spread, ill the middy near the trunk road, north-west of 
Bela, the trap has the appearance of having broken through the strata and overflowed 
the rocks to the south. For a distance of about 20 yards, tlie nearly horizontal shales, 
upon which, immediately to the south, the trap rests, are seen in actual contact with the 
vertical trap for a depth of about six feet. East of this section the trap is covered by the 
alluvium, but to the west it is regularly interbedded with the shales. 
Raipoor. In the nuddy near Raipoor a similar apparent ease of intrusion is seen, 
hut here unconnected with any overflowing trap. 
