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- Carbonatite dikes cutting across Chancellor Group slate, Yoho National Park, British Columbia, Canada by Callan Bentley
Here, two carbonatite dikes cut across Cambrian-aged Chancellor group slates. The dikes have been geochemically correlated with the Devonian Ice River Complex, and they have been deformed (boudinaged with calcite/quartz veins forming in boudin necks, as well as folded) during Canadian Rockies mountain building. . Be...
The cliff is composed of Jurassic Summerville Formation - interlayered shale and gypsum beds. Cutting across this are large veins of hydrothermally remobilized gypsum. On a smaller scale there are many more smaller gypsum veins cutting the entire formation.