Canadian Geology & Landscape

The ground beneath Canada tells a two-billion-year story.

From the Precambrian rock of the Canadian Shield to the hoodoos of the Alberta Badlands, the country's geology shapes its soils, watersheds, and the way people settle the land. Stone & Field covers these formations in detail.

Updated May 2026  ·  Toronto, ON

Canadian Shield landscape in Ontario showing exposed Precambrian granite

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Three areas of Canadian geology worth understanding: the ancient shield rocks, the landforms left by retreating glaciers, and the sedimentary badlands of the west.

Precambrian Shield cliff at Thompson Lake, Saskatchewan

Shield Geology

The Canadian Shield and Its Precambrian Rock

Granite, gneiss, and ancient greenstone belts spread across nearly half of Canada's land area. This is what the Shield is made of and why its age matters.

Updated April 2026

Esker at Sentry Island, Nunavut, stretching into Hudson Bay

Glacial Landforms

Glacial Landforms Across the Canadian Landscape

Drumlins, eskers, moraines, and kettles — the retreat of the Laurentide Ice Sheet left behind a readable record across every province and territory.

Updated April 2026

Hoodoos in Drumheller, Alberta Badlands

Sedimentary Geology

Hoodoos and Badlands: Alberta's Sedimentary Record

The Drumheller Valley cuts through Cretaceous-age sediments that preserve one of the world's densest records of dinosaur fossils and ancient floodplain environments.

Updated May 2026

The Niagara Escarpment runs 725 kilometres through Ontario.

This Silurian-age dolomite ridge forms the backbone of Georgian Bay's western shore and the Bruce Peninsula. Its layered rock face records ancient shallow seas that predate the first land plants.

Permafrost underlies roughly 40 percent of Canada's land area.

In the continuous permafrost zone of Nunavut and the Northwest Territories, ground temperatures remain below 0°C year-round to depths of several hundred metres, shaping drainage, vegetation, and infrastructure.

By the numbers

Canada's geological scale

4.28B
Years — age of the Acasta Gneiss

Located in the Northwest Territories, the Acasta Gneiss complex is among the oldest known exposed rock on Earth, dated by uranium-lead radiometric analysis.

5.1M
km² covered by the Canadian Shield

The Shield forms the geological core of the continent. Its exposed Precambrian basement rock underlies portions of every province except British Columbia and Prince Edward Island.

10,000
Years since peak deglaciation

The Laurentide Ice Sheet reached its greatest extent roughly 20,000 years ago and had largely retreated by 8,000 BP, leaving behind the lake-dotted, drumlin-scored terrain now visible across central Canada.

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