NUMMULITIC ELLIPSOID OF JATTA. 127 



way or the other a little from east and west lines of strike. A band of 

 purple color runs along the side of the hills, and between this and the 

 limestone the clays have a redder tinge. 



In the gorge of a stream due north from the quarries, this red band 

 underlies the nummulitic limestone at an angle of 70,° both being invert- 

 ed. The limestone here is about 80 to 100 feet in thickness, and con- 

 sists of Alveolina limestone outside, hard, dark, and flaggy limestone with 

 one cherty band near the centre, and more shaly alternations with thin 

 Fossil shell sections in oyster-bearing bands towards the south or lower 



the limestone. part of the grQup> j n ^ ^^ ^^ ]i mes t ne, 



sections (presumably of long gastrojoodous shells) of the forms shown in 



Fig. 28 are not unfrequent, and have also been observed in* other 



neighbouring parts of the district : the figures are about natural size. Just 



inside the limestone band, a considerable quantity of very red clay 



Gypseons series within occurs, in which there are purple sandstone or 

 the limestone border. flag>gy kyerg . gouth Q f thig cky and witMn ^ 



belts formed by it and the limestone, the gypsum and gypseous clays 

 cover the ground, being irregularly and unequally spread over it, some- 

 times in quantity though of uncertain thickness, and sometimes as close 

 to the highest of the salt quarries, apparently absent, or but poorly re- 

 presented. A projecting part of the escarpment 



Section. 



here presents the following section, but the upper 

 zones were not within reach of measurement : — 



(Arrangement nearly horizontal). 



5. Nummulitic limestone, a remnant. Ft, 



4. Red clay zone ... ... ... ... 25 



3. Greenish clays (Sheenlcoura) ... ... 6 



2. Dark gray salt, bituminous for 2 feet at top .., 10 



1. Good gray salt ... ... ... ... 50 



Along with No. 3 at a little distance was a 10-foot band of greenish-gray gypsum. 



To the northward of the salt chowki or boorj, on the rising ground 

 there, covered with gypsum and gypseous debris, 



Black shale. 



the former contains a black carbonaceous-looking 



( 231 ) 



