Rundle Rock quarry at base of Pigeon Mountain

Rundle Rock, known for its smooth surfaces and blocky shapes, is the famous building stone used for the Banff Springs Hotel and a popular decorative stone in and around Calgary. It was first described in 1887 by geologist R.G. McConnell and was named by stone masons quarrying the rock from the base of Mount Rundle near the town of Banff. Rundle Rock is a blocky sandstone with earthy grey and brown colours that originated as sand deposited on Early Mesozoic seafloors about 245 million years ago.

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Legend

	Holocene	Present - 10,000 years ago
	Quaternary	10,000 - 25,000 years ago
	Tertiary	25,000 - 65 million years ago
	Mesozoic	65 - 245 million years ago
	Paleozoic	245 - 670 million years ago