Stephen Formation, Geological formation in British Columbia, Canada
The Stephen Formation consists of shale layers with limestone and siltstone deposits stretching across the Canadian Rockies of British Columbia and Alberta.
The formation dates back to the Middle Cambrian period, between 513 and 497 million years ago, when sediments accumulated in ancient marine environments.
Scientists study this formation extensively for its remarkably preserved soft-bodied fossils, which form the Burgess Shale collection at multiple quarry sites.
The formation includes two distinct sections: a thin sequence in shallow waters and a thick sequence deposited beyond the Cathedral escarpment cliff.
The sediments contain dark mudstone layers approximately 508 million years old, preserved at depths of 200 meters beneath ancient storm wave zones.
Location: British Columbia
Made from material: shale
GPS coordinates: 51.46420,-116.32400
Latest update: March 3, 2025 18:07
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