Breakup of a supercontinent between 625 Ma and 555 Ma - New evidence and implications for continental histories

Mathematics – Logic

Scientific paper

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Continental Drift, Geochronology, Planetary Evolution, Tectonics, Bibliographies, Igneous Rocks, Northern Hemisphere, Southern Hemisphere, Stratigraphy

Scientific paper

Tectonic subsidence histories for the early Paleozoic miogeoclines support hypotheses that pertain to the existence and fragmentation of a late Proterozoic supercontinent, and suggest novel, testable hypotheses for the configuration of such a landmass and the timing of a major phase in its eventual breakup and dispersal. Analyses of tectonic subsidence constrain the timing of a widespread episode of continental breakup to a relatively narrow interval between 625 and 555 Ma. It is concluded that the geologic evidence of the breakup event in early Paleozoic miogeoclines occurs in strata of Vendian and earliest Cambrian age.

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