[parks] presidential ADDRESS 23 



Other names must be mentioned as illustrating the group of 

 which Dr. WilliamiS was the pioneer: among these are Drs. W. J. 

 Wright, A. O. Hayes, and W. A. Bell. These gentlemen have added 

 much to the detailed stratigraphy of the Carboniferous. The out- 

 standing feature of their work is the introduction of American terms 

 and the attempt to correlate the maritime Carboniferous strata with 

 those of the American interior sea. The following classification of 

 the Horton-Windsor series published in 1921 is illuminating: — • 



TABLE OF NOVA SCOTIA STRATA 



Tennesseean (Chesterian) 



Windsor series (marine) 

 Tennesseean (Mcramecian) 



Cheverie series (terrestrial) 

 Waverlian (Kinderhookian) 



Horton series (terrestrial) 

 Silurian and Pre-Cambrian slates and Devonian. 



Dr. G. F. Matthew in a paper read before this society in 1908 

 gave the following generalized classification of the Cambrian or 

 Cambro-Ordovician cycle of sedimentation: it is extremely significant 

 of his style and method: — • 



Matthew's table of cambrl\n strata 



St. John 



Division 3 

 Band e — Leptobolus 

 Band d — Tetragraptus 

 Band c— Dictyonema 

 Band b — Peltura 

 Band a — Parabolina 



Division 2 

 Band c — Olenus 

 Bands a and b^ — ^Paradoxides 



Division 1 

 Band c — Paradoxides 

 Band b — Protolenus 



Etcheminian 



Cold brook 



