SEC. 10.] NORTH-WESTERN KXJTCH. 237 



calcareous nummulitic beds with a similar dip. They occupy but 50 or 

 60 yards in widths and have so small a thickness here (some 60 feet) as to 

 render probable a continuation of the fault which brings them against 

 the Jurassic rocks further towards Goonaree. A layer of reddish 

 marly rock overlies the nummulitic beds, succeeded by a partially con- 

 solidated sand bed of considerable thickness containing some large 

 silicious rib bones overlaid in turn by greenish and variegated lateritie 

 clay. These are the last beds seen towards the Runn, but some others, 

 previously mentioned, come on further to the east. 



Close to Lukput the dip changes to the west, and the nummulitic 

 beds, still thin, undulate over the surface, forming ground of peculiarly 

 barren aspect quite devoid of vegetation and thickly gravelled with 

 nummulites derived from the marly beds just beneath. A small denuded 

 hollow south of the fort exposes again the underlying gypseous shales, 

 overlaid by the nummulitic beds, which, on the south side of this hollow 

 in a cutting alluded to by Colonel Grant, are seen to change from a dip 

 of south at 35° to horizontal. 



The northern inclination of these beds just now mentioned extends 

 to the town of Lukput, and is part of the small anticlinal described by 

 Colonel Grant as passing through the town. 



The same nummulitic beds spread over a large tract south and 

 south-west of Lukput, the upper portion being characterised by an abund- 

 ance of flat thin Nummulites exponens, or larger saddle-shaped forms, 

 and the lower by a thick contorted variety, the lowest beds seen being 

 the brown and yellow friable shales, with plant impressions, of the sub- 

 nummulitic group. 



Westward of this tract the higher level of the nummulitic ground 

 declines towards the estuary of the Koree, where 



South-west of Lukput. 



it is intersected by Runn-like recesses and much 

 occupied by hills and hillocks of blown sand. In this direction, at one 



( 237 ) 



