NOVA SCOTIAN GEOLOGY. — HONEYMAN. 213 



The Carboniferous formation may be seen from the map to 

 come into contact again and again with every member of the 

 Upper Arisaig series, and even with the intrusive rocks that give 

 stiikeand dip. It is found overlying these strata and intrusive 

 rocks, and overlapping them a latere and a tergo. The Carbo- 

 niferous strata in these positions are respectively conglomerates, 

 sandstones, claystones and limestones. These have been formed 

 simultaneously by mechanical and organic agencies, in various 

 conditions of formation. We then have alternations of conditions) 

 and sandstones and claystones are made to succeed limestones, 

 and limestone to succeed sandstone and clays. 



The oldest limestone at Springville is that which is in contact 

 with the strata of C in Holmes' Brook and River. This is as far 

 as seen non-fossiliferous ; the next is that of McLean's quarry, 

 and Lime brook. Sandstone strata intervene between this and 

 D strata; this is fossiliferous, the fossils are corals of the genus 

 Lithostrotion. At Grant's factory on the river are limestones 

 with clayey strata ; these are next in order ; they have a richer 

 fauna. Others on the river farther down and on the West branch 

 are also fossiliferou . In the last the pteropod, conularia is 

 found. This genus has already been recognized in B' Clinton 

 of French river. 



The collated fauna of the Springville limestones, are : 

 Localities. Ccelenterata. 



Actinozoa. 

 Lime brook. Lithostrotion pictoense. 



Factory, E. River. Crinoidea. 

 Molluscoida. 

 Producta cora. 

 do. martini. 

 Black Teeth. Spirifer, sp. 



Lamellibranchiata. 

 Factory. Nucula? 



Gasteropoda. 

 Genus? 

 Heteropoda. 

 Bellerophon decussatus. 



