432 PROCEEDINGS OF THE GEOLOGICAL SOCIETY. [May 10, 



The shales and sandstones formed at the close of the epoch 

 approximate in appearance to those of the Coal-measures, hut are 

 not known to extend heneath the great coal-field. 



VIII. Carbonieeeotts. 



Grey sandstones and shales of various shades, from grey to black, 

 are spread in nearly horizontal layers over the central and eastern 

 parts of 'New Brunswick. Coarse red shales and grits are found 

 resting upon the sandstones at Grand Lake and elsewhere. 



After an examination of plants from various parts of this exten- 

 sive basin, Dr. Dawson remarks, " In this coal-basin there is a mix- 

 ture of the floras of several different horizons, possibly due to the 

 comparatively small thickness of the Carboniferous beds." The plant- 

 remains he believes to be on the horizon of the " middle Coal-forma- 

 tion, though tending to the upper." His view regarding the thin- 

 ness of these measures seems to be corroborated by the presence, 

 towards the central and eastern part of the basin, of low islands of 

 Silurian and Devonian strata, projecting through the horizontal 

 sandstones of this series. 



Professor Bailey's observations on the southern border of this basin, 

 at Hampstead, would seem to indicate that a want of conformity to the 

 extent of about 15 degrees may be found to exist between the Coal- 

 measures and the Lower Carboniferous formation. 



South and east of the large area covered by this latter series, the 

 Coal-measures again appear in "Westmoreland county (" North 

 Joggins"), and extend in a narrow interrupted belt along the north 

 shore of the Bay of Fundy, where a flora similar to that of the 

 Millstone-grit is present*. In this quarter they sufiered extreme 

 dislocation at some period prior to the Trias f. 



IX. General Remarks and Conclusions. 



Prom the preceding observations and the publications to which 

 reference has been made, we may gather that nearly all the principal 

 Palaeozoic formations have now been recognized in Acadia. Thus the 

 Huronian exists in St. John county, New Brunswick. 



Lower part of 1 St. John county, New Brunswick (Hartt.) 



Lower Silurian J " Central New Brunswick. 



„ ,, Atlantic coast, Nova Scotia (Dawson). 



Middle Silurian „ Central and North-eastern Nova Scotia 



(Dawson). 

 ,, „ ? Southern New Brunswick. 



Upper Silurian „ Northern New Brunswick (Henwood and 



„ „ Southern New Brunswick. [Gesner). 



„ , , Northern and North-eastern Maine (Hitch- 



cock). 

 „ „ North-eastern Central, Nova Scotia 



(Dawson). 

 Lower Devonian ,, Northern Maine (Jackson and Hitchcock). 

 „ ,, N. Central Nova Scotia (Dawson). 



* See Report, page 94. t Page 94 et seq. 



