FUSULINA LIMESTONE. 



* Ghorband limestone', but between the Shibar pass and Balula and again 

 in the mountains on the north side of the Bamian valley, parts of the 

 limestone are full of Fusulina and Schwagerina, which define the age of 

 the rock as Upper Carboniferous or Permian. Fusulina limestone 

 occurs again on the Ak Robat Kotal on the road from Bamian to Sai- 

 ghan. In this area it is associated with the grit, quartzite and slate 

 that I have referred to the Helmand series. On the ascent to the crest 

 of the range behind the Ak Robat caravansarai, the limestone is under- 

 lain by a thick bed of conglomerate. A similar rock occurs at Shumbal 

 in huge blocks lying on the limestone, but was not found in siin. 



In the Khwajagar ravine in Bamian the Fusulina limestone series 

 consists of a massive, apparently unfossiliferous rock overlain by a small 

 thickness of slate and cpiartzite, followed by shaly thin-bedded limestone 

 containing large numbers of Fusulina;, including F. elongata Shumard 

 and F. uralica Krotow. With this is associated a band of compact 

 black limestone containing brachiopods, of which the commonest is 

 Productus pnnctatus Mart. ; other genera are Reticular ia {R. line at a 

 Mart.), Dielasma, Uncinulus aud Spirifer. Above this is a thin band 

 of coral limestone, succeeded by more limestone with Fusulina and a 

 thick mass of pale grey limestone containing large numbers of 

 Schwagerina. 



The Fusulinidat of these limestones comprise the following species : — 

 Fusulina uralica Krotow. 

 „ elongata Shumard. 

 „ sp. indet. 

 Schwagerina princeps Ehrenberg (including 6'. verbecki 

 Geinitz). 



„ (Doliolina) lepida Sch wager. 



Neoschwagerina craticulifera Schwager. 



,, primigena Hayden. 



Sumatrina anna Volz. 

 In addition to these there are many other foraminifera, most of 

 which have been observed only in thin sections under the microscope 



