Industrial Minerals

Commodity Summaries

Tyndall Stone


Gillis Quarries Limited is now the largest and longest operating company to quarry and process Tyndall Stone. Tyndall Stone was first used in the construction of Lower Fort Garry in 1832 and throughout the years, Tyndall Stone has proven to be a quality building limestone that harmonizes very well with other building materials, lending itself to innovative home and commercial designs.


Tyndall Stone is a mottled dolomitic limestone of the Selkirk member of the Ordovician Red River Formation. The rock is cream coloured limestone with buff, grey or golden coloured dolomite mottlings.


Tyndall Stone enjoys a continent wide popularity. Projects of significant profile that use Manitoba Tyndall Stone include the Manitoba Provincial Legislative Building, the recently opened Canadian Museum for Human Rights in Winnipeg, the Parliament Buildings in Ottawa, the Canadian Museum of Civilization in Hull, the Empress Hotel in Victoria, the Lied Centre for the Performing Arts in Omaha, and the Walsh Centre for the Performing Arts at the Texas Christian University campus in Fort Worth Texas.


Gillis Quarries has operated a Tyndall Stone quarry, 40 km northeast of Winnipeg, since 1922.


Tyndall Stone deposit lies in layers or beds, with the top layer located from eight to fourteen feet below the ground surface. After the top stone layer is exposed, vertical parallel cuts are made with quarry saws. These saws run on one hundred foot tracks and use eight foot diamond tipped blades which cut up to three feet into the stone. After the saw cuts are made, the stone is raised from the layer with wedges and is then split into six or eight ton blocks using drills and wedges. Front-end loaders move the stone for storage or to the processing mill.


Gillis Quarries Limited
2895 Wenzel Street
Winnipeg, Manitoba
R2E 1H4
Phone: 204-222-2242
Toll free: 1-800-540-0988
Fax: 204-222-7849

back to top