Stresses transmitted from the Grenville province utilized this weak zone to close and invert the rift. A zone of weak lithosphere created by rifting became the locus for deformation within the otherwise strong continental lithosphere.
The rift developed adjacent to the tectonically active Grenville province, and its rapid evolution from an extensional to a compressional feature at c1080 Ma was coincident with renewal of northwest-directed thrusting in the Grenville, probably caused by continent-continent collision. Use these Special Offers and Vouchers to get amazing discounts up to 15 Off. On the southwest-trending arm of the rift, the crust was shortened about 30km on the southeast-trending arm, strike-slip motion was dominant. Weve got Seafight Rift Cannon and get up to 30 Off. Thrusting culminated at about 1060 Ma but may have begun as early as 1080 Ma. Soon after rifting, stresses changed from extensional to compressional, and the central graben of the rift was partly inverted by thrusting on original extensional faults. The Midcontinent rift formed in the Laurentian supercontinent between 11 Ma.
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