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SECTION III. 



DESCRIPTION OF FOSSIL TREES DISCOVERED IN THE STRATA OF THE 

 CARBONIFEROUS SERIES. 



I. Fossil vegetables found at lennel braes, near coldstream, on the 



BANKS OF THE RIVER TWEED, IN BERWICKSHIRE. 



In the neighbourhood of Coldstream, on the banks of the Tweed, nu- 

 merous fossil vegetables occur imbedded in shale. It has long been disputed 

 to what class of rocks the deposits of this district ought to be referred. 

 Some are of opinion that they are members of the old red sandstone series, 

 while others think that they are to be classed with a much more recent de- 

 posit, the new red sandstone. The following facts, which have been ob- 

 served by my intelligent friend Mr Francis Forster and myself, will, I 

 trust, set that question at rest. 



Immediately below the bridge at Coldstream, at its south end, you per- 

 ceive a bed of shale, belonging to the mountain limestone series. 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 distance of ra- 

 ther more than two miles, a great variety of shale and grit beds, evidently 

 belonging to the mountain limestone series, may be seen rising to the south 

 and south-south-west, but irregular in their inclinations. 



Lennel Braes being exposed to the waters of the Tweed, these ancient 

 fossils are to be obtained there in the greatest abundance. Both banks 

 of the river are occupied by alternating beds of sandstone and shale, from 

 Lennel Braes down to a very fine sandstone cliff, about three fourths of a 

 mile above Sir David Milne's house. 



