Canadian dimension-stone belts
File from Wikimedia Commons depicting limestone workings near Steep Rock, Manitoba; horizon scales belong to the original photographer.
Eastern limestone arcs
Quarried limestone from the St. Lawrence lowlands appears across civic architecture in Montréal, Ottawa, and coastal port cities. Memoirs published by federal and provincial survey organizations separate Tyndall-style buff beds from grey Ordovician ledges. When a heritage file names a “Tyndall” classing, check whether the named bed actually shipped from the Red River Valley plants or from an Ontario riverfront yard that relabelled stock for export manifests.
Granite and gneiss coasts
Atlantic Canada’s exposed granites supplied lighthouse foundations and breakwaters before narrow-gauge contractors shifted cribbing schedules. Field crews distinguish pegmatite seams visually from staining shells; archive captions rarely spell that out. When a shipyard letter references “blue granite,” cross-read petrography appendices to see whether the author meant a true granite or a gneissic label from a marketing circular.
Interior shield sandstones
Sandstone used for Romanesque trim in Prairie cities often arrived by rail from Ohio or Minnesota as well as from local river bluffs. Heritage arguments sometimes overstate “local” provenance; consult bills of lading in municipal fonds when the architrave colour does not match outcrop swatches on record.
Navigation
Return to Bench marks and stone dressing for dressing terminology. Advance to Quarry sites and heritage records for water-table language. Authoritative context on national culture policy appears on the Canadian Heritage domain; built-heritage advocacy on the ground is also documented by the National Trust for Canada.