Description:A metamorphic rock formed by the action of tectonic forces on sedimentary rocks (mudstone and sandstone), so that fine-grained parts of the rock split along cleavage planes that do not follow the sedimentary layers.
Representing:Sediment deposited during the Neoproterozoic Era, about 600 million years ago, and deformed during the building of the C
Original location:Lake Louise, Alberta
Estimated mass (tonnes):1
Donor:Courtesy of Parks Canada