251 



embraces the greater part, at least, of the Alleghany form- 

 ation in the Appalachian trough of the United States. 

 Evidently several widely removed plant-bearing horizons 

 have furnished material for the list, and it is not unlikely 

 that some of the lower of these may be as old as the upper- 

 most portion of the Pottsville, or perhaps the Middle Coal 

 Measures of Europe. As belonging to the "Upper Coal 

 formation" Dawson mentions a number of species some of 

 which are clearly Stephanian and as high as the upper part 

 of the Alleghany in the Appalachian coal fields. 



THE CARBONIFEROUS SECTIONS ON SYDNEY 

 HARBOUR*. 



(J. E. Hyde.) 



INTRODUCTION. 



The section at Sydney shows the Mississippian (Sub- 

 Carboniferous) formations, especially the Windsor series, 

 succeeded by three Pennsylvanian (Coal-Measures) form- 

 ations, the Point Edward formation, the Millstone Grit 

 and the "Coal Measures". No other locality at present 

 known in the eastern part of Canada shows all of these 

 formations both so characteristically developed and with 

 their stratigraphic succession uncomplicated by faulting 

 or folding. Exception is not made even to the Joggins 

 section. The Sydney section is the only section so far 

 known in which beds w^ith the Leaia fauna (the Point 

 Edward formation which is believed to represent the 

 Riversdale and Union) can be seen lying on the Windsor 

 series, and overlain by the Millstone Grit. This section 

 has determined the stratigraphical position of this fauna, 

 although its approximate age has been known for several 

 years. 



*See Map — Sydney. 



