1856.] Economic Geology of Assam. 337 



stone. The first washing of this rock is of a pinkish colour from 

 reddish coloured specks in the stone, similar to that of the Degaroo, 

 and the two rocks may be considered analogous. 



5. Ditto ditto. — Ditto 2nd washing of No. 4. 



6. Washed clay from red marl deposit. — This deposit apparently 

 from a decomposing Felspar rock is in a state of marl on the road 

 in the vicinity of Bur Pathur, G-olaghat district. The out-crop is 

 extensive, and the deposit looks of great extent. It is very accessible 

 by means of the Dhunseree river and the road to Bur Pathur. 



7. Washed clay from pinkish colored marl. — Jeypore coal measures, 

 Upper Assam. This is not deposited in a regular stratum with the 

 coal, though found close by. It is a deposit from a decomposing 

 Felspar rock of which there are many varieties, and a Very old 

 deposit apparently, running along the edge of the low hills. It is 

 plentiful and accessible. 



8. Tough clay bluish colored. — This is the common tough clay or 

 clunch of the Jeypore coal measures. To be had in any quantity. 

 It makes a very good wash for walls and is no doubt a good pottery 

 clay. 



9. Clay. — From an extensive deposit in the bank of the Booree 

 Dehing at Jeypore. This clay deposit apparently dips under the 

 low hills at Jeypore, and covers a rubble containing gold. 



10. Black clay. — Found in several localities in Upper Assam. A 

 large deposit at the foot of the hills in Dopa Bur, near Gerghon, 

 Seebsagur district ; also visible on the Booree Dehing at Hooloo- 

 goorie. Accessible, extent of the deposit unknown ; that at Dopa 

 Bur appears the largest deposit, 



11. Washed clay from ferruginous deposit. — This is found in the 

 bank of the Dibroo river, the deposit contains magnetic iron sand. 

 The fishermen use this in colouring the walls of their houses and the 

 ochre washed from it, is a very fine one. 



12. Tough clay. — Banks of Dhunseree river, Golaghat district. 



13. Ditto ditto.— Ditto. 



14 to 25 (inclusive). Tough clays. — Of various shades and textures 

 from the Brahmaputra bank and the Dhunseree river. These are given 

 to shew the variety of clays procurable in the Seebsagur district, and 

 visible on the banks of both the Brahmaputra and Dhunseree river. 



2 y 



