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How did Rodinia differ from Pangea?
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Pangea
Distribution of landmasses, mountainous regions, shallow seas, and deep ocean basins near the end of the Permian Period. Included in the paleogeographic reconstruction are the locations of the interval's subduction zones.
Rodinia and Pangea were both supercontinents that incorporated nearly all of Earth's landmasses, but they existed during vastly different periods of geologic time.12
- Temporal Differences: Rodinia formed approximately 1.2 billion years ago during the Proterozoic Eon and began to break apart around 750 million years ago. In contrast, Pangea was fully assembled by the Early Permian Epoch (roughly 299 to 273 million years ago) and began its fragmentation about 200 million years ago during the Early Jurassic Epoch.12
- Formation and Geography: Rodinia emerged from the fragments of an earlier supercontinent called Columbia. Pangea, which was C-shaped and spanned from the northern to southern polar regions, formed through the collision of landmasses including Gondwana, Euramerica, and the Angaran craton.12
- Scientific Context: While Pangea’s existence was famously proposed by Alfred Wegener in 1912 as part of his theory of continental drift, the identification of Rodinia relies on modern plate tectonics and precise radiometric dating of rocks to reconstruct Earth's much older history.23