DESCRIPTIVE GEOLOGY: NUMMULITIC ZONE. 



213 



observed to be inverted at the surface. The Jurassics have a fairiy 



%\i 



)* 



s good development, and the following 



D 



o typical vertical section through them 



c 



2 may be deduced : — 



o 



£ (1) Nummulitic limestone. 



o (2) Ferruginous bands = pisolitic iron-ore I foot, 



(3) Buff-coloured .thin-bedded, shaley 

 limestones . ... 100 feet. 



(4) Compacted shelly limestone . . 50 ,, 

 (passing into) 



(5) Interbeddings of (3) and Gieumal 

 sandstone . . . . 60 ,, 



(6) Gieumal sandstone with two or three 

 thin calcareous layers of Trigonice 80 „ 



Black shaley sandstone and black 



shales — Spiti shales . • .5-I5 „ 



Trias limestone, exposed for . . 300 „ 



I ;ij Horizontal section No. 4, to which we 



o a* 



•S ■£ 



« S * 



s-a 



Cm 



*0 Tj- 



R .5 



1 I Section from near n0W return > ski P s 

 2 g BukkatoSydpoor. the short stretch of 



»— , z 

 11 11 country between the Nalan and Bukka 



"° *» 



village. This line, through a failure of 



«u arrangements, was not actually crossed 

 ■§ m by any of my party. A similar line 

 J o further to the north-east was, however, 

 n | crossed near Bhagpoor Dheree and 

 ""7 Nurotur. South-east of Bukka, across 

 JaJ= the rather flat valley in which Talhar 

 •S'g lies, and over the final ridge to Syd- 



-? g, poor, the hill structure, though a little 



.5 5 



£ ° complicated, can be understood by re- 



~ "* ference to the section. The undulat- 



m ing folds of the Jubbi-Gerani ridge, 



• s and the sharply refolded strata on the 



; jj, hill-spur near Sydpoor, are particularly 



1 well seen. This brings us to the south- 



eastern edge of the Nummulitic zone 



which here overlooks the Rawalpindi 



plateau. 



( 213 ) 



