330 



Unfortunately the present stand of the fossil timber is 

 not so striking, owing in some measure to the destructive 

 tendencies of fossil hunters. In 1852-53 Lyell restudied 

 the section in the company of Sir William Dawson. Since 

 then his drawings of these logs and those of Dawson have 

 appeared in many text books on geology. 



Sir William Logan in 1843 published a careful description 

 and detailed measurements of the northern limb of the 

 Joggins syncline, as exposed from Mill creek at the base of 

 the section to the uppermost beds of Shulie. In recognition 

 of the seeming continuity in the sedimentation of his 14,570 

 feet (4,441 m.) of strata, he divided the section more or less 

 arbitrarily into eight divisions, but each group was charac- 

 terized on the whole by a dominance of certain characters. 

 Fresh from his experience in the British coal fields, he was 

 the first to appreciate the significance of the numerous 

 ancient soil beds and underclays, so well exposed to view, 

 as illustrating the formation of coal in situ. 



Dawson in his second edition of the "Acadian Geology" 

 in 1868 presented an accurate and very readable account 

 of the regional geology, with many additional detailed 

 observations on the sedimentary sequence and mode of 

 origin of the beds, and with illustrations and descriptions 

 of the characteristic flora and fauna. 



To Fletcher and Ells of the Canadian Geological Survey 

 are chiefly due former interpretations of the difflcultly 

 ascertained structure of the largely concealed inland por- 

 tions of the basin. 



DETAILED DESCRIPTION. 



TABLE OF FORMATIONS. 



The classification of the Carboniferous rocks as pre- 

 sented here is a provisional one, and the older terminology 

 is included for comparison. 



