80 



WYNNE : GEOLOGY OF KUTCH. 



[part I. 



marly limestones, and hard muddy beds, some being almost entirely made 

 up of fossil shells (converted into yellow carbonate of lime) or dis- 

 tinguished by a great abundance of Pectens or oysters, while, on the 

 whole. Gastropoda predominate. 



Amongst those collected from this zone are the following genera : — 



Balanus. 

 Serpula, 

 Bryozoa. 



Neptunus. 



NaticcL 



Ostr(Ba. 





Palceocavpilius. 



Cyprcea. 



Spondylus. 



Tellina. 



Turritella. 



Cerithium. 



Pecten. 



Anoviia. 



Conus. 



Scala. 



Pectunculus. 



Placuna. 



Fusus, 



Solarium. 



Modiola. 



Corbula. 



Oliva. 



(&C. 



Venus. 



(C'c. 



Jiosiellaria, 





Cytkerea. 





Pleurotoma. 





Cardium. 





Voluta. 

 Murex. 





Area. 

 Nuculana, 





Spines of Hchi- 



nodernis. 

 Corals. 



The argillaceous beds immediately succeeding the highly fossiliferous 

 zone consist mainly of soft sandy clays and muddy shales, with a few 

 compact sandstone layers thinly laminated and ripple marked, and a, 

 narrow band largely made up of fragmentary shells with clusters of 

 barnacles upon its surface. Higher up the beds contain bored clay 

 nodules resembling pebbles, Bryozoa encrusting the shells of Pectens and 

 oysters, and one soft sandy band full of casts of a little Cerithium, re- 

 sembling C coniciim, &c. 



The higher beds of this group have often been removed by denuda- 

 tion prior to the deposition of the next. 



Uppee Tertiary. 

 F. — The unconformable group has at its base a conglomerate in 

 places more or less ferruginous, but of no great 

 thickness ; this is succeeded by thick-bedded brown 

 sands or incoherent sandstone, parts of which near the base are connected 

 by carbonate of lime ; calcareous segregations also occur throughout the 

 rock, and the only organic remains found were a few large logs of fossil 

 timber. 



The upper members of this group are ill defined, the most recog- 

 nisable being a great thickness of obliquely laminated concretes some- 

 ( 80 ) 



Upper Tertiary. 



