Tyndall Stone is a registered trademark name by Gillis Quarries Ltd. Tyndall Stone is a dolomitic limestone that is

quarried A quarry is a type of open-pit mining, open-pit mine in which dimension stone, rock (geology), rock, construction aggregate, riprap, sand, gravel, or slate is excavated from the ground. The operation of quarries is regulated in some juri ...

from the

Selkirk Member The Red River Formation is a stratigraphical unit of Late Ordovician age in the Williston Basin. It takes the name from the Red River of the North, and was first described in outcrop in the Tyndall Stone quarries and along the Red River Valley ...

of the Ordovician

Red River Formation The Red River Formation is a stratigraphical unit of Late Ordovician age in the Williston Basin. It takes the name from the Red River of the North, and was first described in outcrop in the Tyndall Stone quarries and along the Red River Valley ...

in the vicinity of Garson and

Tyndall Tyndall (the original spelling, also Tyndale, "Tindol", Tyndal, Tindoll, Tindall, Tindal, Tindale, Tindle, Tindell, Tindill, and Tindel) is the name of an English family taken from the land they held as tenants in chief of the Kings of Engla ...

, Manitoba, Canada. It is a cream-coloured limestone with a pervasive mottling of darker dolomite. The mottling gives the rock a tapestry-like effect, and it is popular for use as a building and ornamental stone.Glass, D.J. (editor) 1997. Lexicon of Canadian Stratigraphy, vol. 4, Western Canada including eastern British Columbia, Alberta, Saskatchewan and southern Manitoba. Canadian Society of Petroleum Geologists, Calgary, 1423 p. on CD-ROM. . Tyndall Stone is highly fossiliferous and the fossils contribute to its aesthetic appeal. It contains numerous fossil gastropods, brachiopods,

cephalopod A cephalopod is any member of the molluscan class Cephalopoda (Greek plural , ; "head-feet") such as a squid, octopus, cuttlefish, or nautilus. These exclusively marine animals are characterized by bilateral body symmetry, a prominent head ...

s, trilobites, corals,

stromatoporoid Stromatoporoidea is an extinct clade of sea sponges common in the fossil record from the Ordovician through the Devonian. They were especially abundant and important reef-formers in the Silurian and most of the Devonian.Stock, C.W. 2001, Stro ...

s, and others. The mottling results from burrowing by marine creatures that occurred during and shortly after limestone deposition. The identity of the burrowing organisms is not known, but fossil burrows of this type have been given the name ''

Thalassinoides ''Thalassinoides'' is an ichnogenus of trace fossil used to refer to "dichotomously or T-branched boxworks, mazes and shafts, unlined and unornamented". Facies of ''Thalassinoides'' increased suddenly in abundance at the beginning of the Mesozoic ...

''. Tyndall Stone was first used in 1832 for building Lower Fort Garry, and has since become popular for building purposes throughout Canada and the United States. The Canadian Parliament Buildings in Ottawa, Ontario, the Saskatchewan Legislative Building in Regina, Saskatchewan, the University of Saskatchewan in Saskatoon, Saskatchewan, the Federal Public Building in Edmonton, Alberta, the Canadian Museum of History in Gatineau, Quebec, the Manitoba Legislative Building in Winnipeg, Manitoba, the Empress Hotel in Victoria, British Columbia, les Apartements Le Chateau in Montreal, Quebec and many others include Tyndall Stone in their construction. The Tyndall Stone quarry is operated by Gillis Quarries Ltd. and is located approximately 40 kilometres northeast of Winnipeg, Manitoba. The quarry has been in operation, and owned by the same family, since 1910.

Cultural reference

Author Carol Shields described Tyndall Stone in her

Pulitzer Prize The Pulitzer Prize () is an award for achievements in newspaper, magazine, online journalism, literature, and musical composition within the United States. It was established in 1917 by provisions in the will of Joseph Pulitzer, who had made h ...

winning

novel A novel is a relatively long work of narrative fiction, typically written in prose and published as a book. The present English word for a long work of prose fiction derives from the for "new", "news", or "short story of something new", itsel ...

, ''

The Stone Diaries ''The Stone Diaries'' is a 1993 novel by Carol Shields. Plot summary The book is the fictional autobiography of Daisy Goodwill Flett, a seemingly ordinary woman whose life is marked by death and loss from the beginning, when her mother dies dur ...

''.

References

External links

{{Wiktionary
Tyndall Stone at Manitoba Industry, Economic Development and Mines

Tyndall Stone® at Geological Survey of Canada

GeoCache of Tyndall Stone® building with fossil descriptions
Quarrying Limestone Dolomite (rock) Building stone Architecture in Canada Stratigraphy of Manitoba Geologic formations of Canada