STRATIGRAPHICAL ELEMENTS: NUMMULITIC. 39 



(3) Well-bedded, massive beds of limestone, with Nummulites and other fossils 



generally not very concretionary, about 200 ft. 



Echinolampas zone. 

 (2) Variegated sandstone and clays with coal, 2 to 20 ft. 

 (1) Grey limestone well bedded, 300—400 ft. 



(/) Grey limestone. 

 The age of this limestone is somewhat doubtful. It is generally 

 barren of fossils, except for a few foraminifera 

 which are minute and obscure. They are 

 often mere specks in the rock. It is possible, therefore, that some, if 

 not all of it, as mentioned above, p. 38, may be of Cretaceous age. As, 

 however, the matter is doubtful, and as stage No. 2 above is not 

 found everywhere with ease and rapidity on the complicated hill- 

 sides, whereas the Cretaceous orange-coloured band always stands out 

 prominently, it has been found more convenient for mapping 

 purposes to make the latter the line of division between the 

 two, and to include the Grey limestone stage in the same wash of 

 colour on the map as the known Nummulitic strata. 



The Grey limestone, as its name signifies, is of a pale neutral grey 

 colour, weathering white. It is very well and 

 rather finely bedded, and of a compact amorphous 

 structure. It weathers in a peculiar way noticeable in similar 

 amorphous rock-masses — the surface of the blocks becomes worn 

 down as if it had been carved with a gouge, leaving sharp 

 meandering edges like miniature mountain ranges. I have seen the 

 same weathering in massive rock-salt. In both cases a fall on such 

 rocks is attended with unpleasant results. 



Although this limestone is uniformly present in the northern part 

 of the Nummulitic zone, and also in the outliers 



Distribution. 



of the younger rocks in the blate zone, its 

 presence in the southern parts of the Nummulitic zone is doubtful. 

 On the whole, I think, the evidence is chiefly in favour of its absence 

 together with the Cretaceous band. It is also certainly absent 

 east of Gurhee Hubeebooluh on Srikot hill. This, so far as it 



( 39 ) 



