Titlebook: Basement Tectonics 10; Richard W. Ojakangas,Albert B. Dickas,John C. Gree Book 1995 Springer Science+Business Media B.V. 1995 Sedimentatio

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In Search of the East Continent Rift Complex: Evidence and ConclusionsIn 1856, David Owen first noted the existence of the Rough CreekShawneetown Fault System. Since that date, evidence has slowly accumulated to indicate the existence of a major polyphase rift complex crosscutting the east-central North American craton.

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THE END OF THE HUMAN SPIRIT: THE , OF 1795Proterozoic time. The most prominent of these rifts in terms of extent and effect upon the crust is the Midcontinent Rift system (MCR) which extends in a series of generally linear segments in an arcuate pattern for a distance of over 2000 km from southern Kansas to the Lake Superior basin and then

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https://doi.org/10.1007/978-3-476-00502-1eath Lake Superior the rift is filled by more than 18 km of subaerial basalt lava flows with minor interflow sedimentary beds overlain by up to 12 km of dominantly red clastic sedimentary rocks (Cannon et al. 1989). Magmatism (passive rifting) lasted from 1109 to 1087 Ma while sedimentation (post-ri

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