near Coldstream, upo?i the Ba?ih of the River Tweed. 17 



of gritty shale, belonging to the coal formation. It may be 

 seen rising to the north-west at an angle of about 14°. 



Above the bridge, on the north side, beds of sandstone, 

 bituminous shale and iron stone, form the cliff rising 8° to 

 the west. 



Between the bridge at Coldstream and Lennel Braes, a di- 

 stance of rather more than two miles, a great variety of shale 

 and grit beds, evidently belonging to the coal formation, may 

 be seen rising to the south and south-south-west; but irregu- 

 lar in their inclinations. 



Lennel Braes being the place most exposed to the swelling 

 waters of the Tweed, these ancient fossils are to be obtained 

 there in the greatest abundance. It becomes necessary to 

 be most minute ; and I shall therefore present the following 

 section. 



Line of Section N. 15° E. dip in that direction 8°. 



Scale 



4 5 



No. 



10. Sandstone (strong) 





9. Shale with two-inch bed of iron-stone 



8. Sandstone divided by shale 



7. Shale 



6. Sandstone 



5. Shale with three, six, and eight inch 

 balls of ironstone and siliceous mat- 

 ter 



4. Shale.!!!!..'..'.'.'.'..'!!...!....'...... 



3. Sandstone 



2. Sandstone in thin plates 



1. 



Shale confused in its beds (resembling 

 the sill of a coal seam) containing the 

 vegetable organic remains with their 

 irregular layers of coaly matter .... 



These waved lines represent the river 

 Tweed. 



Feet 



Ft. 



8 



4 -J 



Both banks of the river are occupied by beds similar to the 

 above, from Lennel Braes down to a very fine cliff about 

 three-quarters of a mile above Sir David Milne's house. 



This sandstone has many characteristic marks of the new 

 N. S. Vol. 8. No. 4-3. July 1830. D red 



