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Viscous remanent magnetization (VRM) recently acquired in the Earth’s magnetic field provides a compass to recover in-situ orientation of unoriented core material. This method was used to date a late chemical remanent magnetization (CRM) in Paleozoic carbonate rocks (Devonian to Mississippian) from the foreland of the western Canadian Cordillera. The paleomagnetic data showed three distinct components: (1) a low-temperature component, which is commonly removed at temperatures below 180°C and is assumed to be induced by drilling; (2) a medium-temperature component, which is commonly removed below 250–400°C, with a steep normal polarity direction; and (3) a high-temperature component, which is...

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