344 MR. A. B. WYNNE ON A FOSSILTPEROUS PEBBLE-BAND 



prove to be concretions. Their material is a fine-grained grey and 

 rusty, non-calcareous sandstone, exhibiting no concretionary struc- 

 ture ; their rolled and abraded surfaces intersect the contained 

 fossils, and even if the pebbles have ever been nodules their sur- 

 faces show that they have been rolled and transported before being 

 enclosed in Dr. Warth's conglomerate bank. 



This being so, the Carboniferous age of the fossils would tend to 

 show that the Conularia-lsijer is newer than the fossils themselves, 

 and the whole of the correlations depending upon the point, whether 

 regarding the boulder-beds of the East or West Salt Eange, or the 

 relations of these to other boulder-beds at great distances, must lose 

 in value or disappear. And yet, though there is no proof, the fact 

 may exist, that the rocks immediately beneath the chief boulder- 

 deposits of the eastern part of the Salt Eange are of at least Palaeo- 

 zoic if not of Upper Carboniferous age *. 



The group next below this red zone is a mass of light-coloured 

 sandstones, often magnesian, with no great variety of texture, gene- 

 rally very hard, occasionally oolitic, sometimes alternating with 

 greenish or grey shaly partings, and but rarely and feebly conglo- 

 meratic, as they extend westward. Its hardness has caused the 

 group to assume the most prominent position among the cliffs of the 

 eastern part of the range. Superficially the beds present here and 

 there the indefinite markings often described as Annelidan or 

 Fucoidal ; but in these pale beds I never found a determinable 

 fossil, while of the few from intercalated dark, sandy, shaly layers, 

 possibly but very doubtfully situated near their base, or in their 

 lower part, at Chel Hill (previously referred to), the single unsatis- 

 factorily determined species (Sigmodus dubius, Waagen) has not 

 been assigned to any definite place in the Palseozoic period, this 

 being assumed by Dr. "Waagen to be the undoubted general age of 

 the deposits from which it came (Pal. Ind. ser. xiii. 1. i. Pisces : 

 Cephalopoda, p. 9). 



Except the few forms amongst which this fossil was found, no 

 other organic evidence has yet been afforded by any of the beds 

 lying between the " Oholus-ha.nd " and the " Comdaria-lsiyeT ; " and 

 the relative grouping was only decided upon by tracing the " Oholus- 

 beds" and the " Magnesian sandstone" (with less distinct character) 

 passing westwards beneath certain " speckled sandstones " which 

 underlie the Carboniferous Limestone, &c. 



* One portion of these underlying rocks, the red sandy and earthy zone full 

 of pseudomorphic casts of salt-crystals, is now claimed by Dr. Waagen as Car- 

 boniferous. It was at his suggestion alone that any attempt was made to 

 define its nominal age in my report, and the period he suggested was Triassic, 

 a point quite unnoticed in his present paper. • 



The recent inspection of this part of the Salt-Range series by Mr. R. Oldham of 

 the Indian Survey (Record Geol. Surv. Ind. vol. xix. pt. 2, p. 127) confirms the 

 views I had held, and has further resulted in the opinion that the " Olive 

 group " rests unconformably upon these red rocks with pseudomorphic salt- 

 crystals. The unconformity so indicated might have a most important effect 

 in the lateral limitation of the Eastern Salt-Range boulder-beds. 



