... Report on the building and ornamental stones of Canada, vol. I-V (1912)
Parks, W. A. (William Arthur), 1868-1936, Canada. Mines Branch · Ottawa : Government printing bureau · leaf 430
a( 26 y. … w o 5 o 273 to the Devonian system and are divided into three groups—a lower, Onondaga;a middle, Hamilton; and an upper, Chemung. The geographical extent ofthese formations has already been indicated and need not be repeated here.The only considerable production of stone is from the lower, Onondaga…
Building stones
Internet Archive · California Digital Library · Public Domain Mark 1.0. Free to use for anything.
