GEOLOGICAL EANGE 273 



Eocene age, as they do in many other places. 

 Associated with these are other genera, such as 

 Hetcrosfcd'nin (tig. 3'2), Opcyculina, and Alreolina 

 (fig. 38), and sometimes hy their abundance they 

 form hmestones ahnost wholly consisting of one 

 particular form. 



The Eocene nummulitic beds extend into the 

 Sinai Peninsula (fig. 34), and thence to other parts 



Fig. o4. — Nummulitic Limestone ; Eocene, Jep.el 

 Abyad, Sinai, x 1G. 



of Asia. In India the nummulites and other Forami- 

 nifera form massive beds of limestone, often con- 

 stituting the greater part of some of the mountain 

 ranges. By a process of folding and crumpling these 

 beds of limestone have been elevated, so as to form 

 some of the highest mountain crests, attaining in 

 some cases an altitude of 16,000 feet. The lower part 

 of the Nummulitic Series in Sind is represented by 



T 



