20 



L.E. POPOV, L.R.M. COCKS AND I.F. NIKITIN 



Unit 5 



8231-40 









."••in 







Fig. 7 The Anderken Formation on the south-western slope of Buldukbai-Akchoku Mountain. A, Units 1 to 5, and Sample localities 8227-80, 1 10 and 

 8231-8240; B, Unit 6 and the contact with the overlying Dulankara Formation and Sample localities 8229 and 8230. Photographs by Lars Holmer. 



Almaty to Balkhash (Fig. 1, locality 5). It is an isolated natural 

 exposure of about 20 m of pink to light red rocks of massive 

 micritic limestone forming the core of a mud-mound with lens- 

 like beds of biosparite at the base of the exposure. Most of the 

 bioclasts are fragmented large cystoid columnals. It contains an 



abundant Parastrophina-Kellerella Association (Sample 948). 



Locality 6. Burultas Valley 



The Burultas Valley (Fig. 1, locality 6) is about 42-45 km west of 

 Chiganak on the western Balkhash coast (northeastern part of 



