AND ASSOCIATED PERMIAN ROCKS OF DURHAM. 207 



No. 4. Locality— CLAXHEUGH. 



Lithological Characters. — Fine-grained, yellow, incoherent sand- 

 stone. From the middle of the deposit. 



ANALYSIS. 



Carbonate of lime 6-72 



magnesia l - 20 



Oxide of iron and alumina 1"28 



Sand and clay 86-72 



Water 4-08 



100-00 

 No. 5. Locality— CLAXHEUGH. 



Lithological Characters. — Yellow, fine-grained, (mixed with 

 large rounded grains) incoherent sandstone. From the middle of 

 the deposit. 



ANALYSIS. 



Carbonate of lime 2-32 



magnesia 1-58 



Oxide of iron and alumina 4-33 



Sand and clay 91-00 



"Water ,. 1-24 



100-47 

 No. 6. Locality— CLAXHEUGH. 



Lithological Characters. — Reddish yellow, and grey, oolitic- 

 like, incoherent sandstone, nearly resembling No. 2. From about 

 the middle of the deposit. 



ANALYSIS. 



Carbonate of lime 64 



magnesia 043 



Oxide of iron and alumina 11-46 



Sand and clay 86-20 



Water 52 



99-25 



General Remarks. — It will be seen that all the samples of this 

 deposit contain more or less carbonate of lime — in one case even 



p 



