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 
strike and dip. It is found overlying these strata and intrusive 
rocks, and overlapping them a latere and a tergo. The Carbonifer- 
ous strata in these positions are respectively conglomerates, sand- 
stones, 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 
Inthostrotion. At Grant's factory on the river are limestones 
with clayey strata; these are next in order; they have a richer 
fauna. Others cn the river farther down and on the West Branch 
are also fossiliferous. 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. Coelenterata. 
Actinozou. 
Lime brook. Lithostrotion pictoense. 
Factory, E. river. Crinoidea. 
Molluscoida. 
Producta cora. 
do. martini. 
Black Teeth. Spirifer, sp. 
Lamellibranchiata. 
Factory. Nucula ? 
Gasteropoda. 3 
Genus ? 
Heteropoda. 
- Bellerophon decussatus. 
