76 
Becords uf tlte Geoloi^icacal Survey of India. 
[VOL. XTI, 
Eijori horizon. 
to 4,317' in tlie Chaoradeo, and to 4,454' in tlie DLupgarh. Close to Singandma 
we pass- from the Denwa group on to the Pachmari sandstone, of which the whole 
Pachmari plateau as well as the mentioned hills consist. This Pachmari sand 
stone proved, in spite of careful examination, unfossiliferous. 
Proceeding from Pachmari southwards, the road, always over Pachmari 
sandstone, leads close by the Mahadeo hill, passing the famous Mahadeo cave in 
the northern flank of the hill; from this cave the descent into the upper 
valley of the Denwa is very rapid, down the steep and abrupt slopes of the 
southern side of the plateau. About Ij mile before reaching the Denwa the slope 
becomes more gentle, and before reaching the police station at foot of the Pach¬ 
mari range (which is about f of a mile from the Denwa) there is a change of 
rocks, 1 . e., under the Pachmari sandstone there appear soft, sandy, micaceous 
shales of greenish, yellowish, or brownish-yellowish colour, which apparently have 
ShiileB under Pachmari the same northerly dip as the over-lying Pachmari sand- 
sandstone. stone ; that this is the case I have found further on. 
Here these shales proved unfossiliferous. Similar shales occur further to the 
north-west near Almod and Rorighat, where they were found to contain only some 
indistinct plant impressions. 
In his report on the Satpura basin, Mr. Medlicott, speaking of his Bijori 
horizon, mentions two possibly different bands, of which 
the higher might be distinguished as Almod beds ; and 
it appears to me that the shales which I just mentioned as cropping out under 
the Pachmari sandstone might possibly represent these Almod beds ; because, when 
proceeding further to the south close to the Denwa r-iver, the shales change some¬ 
what in appearance, they become a little harder, greyish and grey colours 
appear, and they are fossiliferous. In position they are lower than the shales 
mentioned before, both having the same dip. To have a better opportunity and 
more time to collect fossils I crossed the Denwa river near Sangakhera Dhana 
and encamped at Barikondam, where I was also close to the spot where the reptile 
said to be Archegosaurus was found in this lower horizon. 
The place where I collected fossils in the shales lies directly to the north of 
Fossil plants in tbe Eijori Barikondam, on the left bank of the Denwa river, be- 
borizon. tween this and the police station at the foot of the 
Pachmari range. The shale crops out at the base of a small hill, on the eastern 
slope of which the road from Pachmari leads to the Denwa river, cutting through 
shales containing fossils. A little to the east of this hill, but still before cros.sing 
the Denwa river (coming from Pachmari), in a small nalla which the road has to 
cross, an instructive section is exposed showing the relation of the strata south of 
the Pachmari range to the Pachmari sandstone, as follows, in ascending order:— 
Dark-grey carbonaceous micaceous shales dipping north at about 15°, con¬ 
taining Yertebraria. 
Greenish-reddish shales slightly micaceous. 
Coarse thin-bedded sandstones, with the same northerly dip. 
a. 
