Subject ASC0001fht
The Quarterly journal of the Geological Society of London.
v.7 (1851), Page 248 (1851)
Smithsonian Libraries
BHL Page 34983943
Keywords
stone sandstone sedimentary lower canada rocks canada section siluran strata Lower Canada Cedar Rapids geology Lower Silurian Canada cross-section Lower Silurian rocks Cedars Rapid Sault St. Louis tortoise tracks gneiss potsdam sandstone calciferous sandstone trenton limestone Utica slates Meteorological observation cross-secction Silurian limestone slates St. Lawrence Lake Huron Labrador Lake Ontario Lake Champlain Silurian section Silurian rocks cross section cedars rapid st louis silurian