TRAP . LATERITE . 



91 



There are several small inliers of Lametas which it is unnecessary to 

 allude to separately, as they can be readily recognised by reference to 

 the map. 



Section XL — Trap. 



I have but little to say of the traps, for only in so far as they form- 

 ed either the limiting boundary of the field, or occurred capping the 

 sedimentary rocks within the compass of the field, did they come 

 under my notice. Intertrappean beds are only exposed to a small 

 extent in isolated patches. No attempt was ever made to trace them 

 for any distance, their occurrence merely being noted. Most of the 

 representative beds are thin flaggy shales, red and green clays, and 

 highly silicious aggregated masses. They may be met with adven- 

 titiously throughout any part of the trap formation. They are not con- 

 fined to any special horizon. 



The traps are most abundant in the north-western portion of the 

 field. A long tongue projects from the main body at Panjorni and 

 extends across to Sorlah and Jamgaon, and there are outliers at Pisdura 

 Ainsa, Dongargaon and Nanduri. Trap also occurs at Karamgohan, 

 and it crosses the Wardha into the Wiin District, where it overlies several 

 square miles of Kamthi rocks. There are no detached caps on the right 

 side of the river. 



A most remarkable circumstance connected with the relation of the 

 coal-bearing rocks to the trap is, that there is not one instance of 

 intrusion. The trap is everywhere overflowing. In the Bengal and 

 Satpura coal-fields there are innumerable ramifications of igneous rock 

 through the coal measures and Panchets. 



Section XII. — Laterite. Surface deposits. 



Massive rock-laterite only occurs within the field on a few hills to the 



north-east of Bhandak, but thin beds and laterite 

 Laterite. . 



gravel are scattered in patches over the country. 



( 91 ) 



