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The original content of the post, with correct link is:
McQuarrie and Wernicke's (2005) - Calculated rotation parameters
Here are the rotation parameters calculated from McQuarrie and Wernicke's (2005) reconstructions: Rotation Parameters: Western US Terranes to North America.
Original post that discusses their article (with link) and derivations: Google Earth: Restoration Parameters and Restoring Data Points.
Original post that discusses their article (with link) and derivations: Google Earth: Restoration Parameters and Restoring Data Points.