Abstract: The building stones used in the Ottawa Parliament Buildings were mined from numerous quarries in Canada, United States, and several European nations.They were cut, placed and carved according to exacting procedures using the most up-to-date technology of the time. Construction of the rebuilt Centre Block, the focus of this article, was a protracted affair, interrupted by the demands of the1914-1918 Great War. Exterior stone of the Parliament Buildings has endured the ravages of weather, fire, seismic shaking and pollution. Recently, great effort and expense have been devoted to the restoration of the masonry elements of all of the buildings to ensure the continued viability of this National Historic Site.The role of the geologist, critical in the initial evaluation and selection of the building stone, was largely ignored until recently. Building restoration of late has also restored the role of the geologist, with the requirement to understand the complex reactions of the building stone to the environment and its neighbouring masonry elements, and in the quest to find suitable replacement stone.

**Includes "Introduction to the geodiversity of Perth"

Geoscience Canadacontains five types of articles, as follows:
https://journals.lib.unb.ca/index.php/GC/search

Review papers - synthesize existing information in some field of the earth sciences.

Series papers - thematic, generally invited, and integrate recent research results with existing information on a specific topic.

Topical articles - discuss the interaction of the earth sciences and Canadian society, or present new research results on a topic of broad interest.

Conference reports - provide a review of some major scientific meeting and its implications to the earth science community.

Regular features comprise book reviews and commentary that includes such things as editorials, letters to the editor, and comment and reply.