Abstract

Fluvial terraces have been studied and dated along tectonically active and inactive plate margins at multiple sites around the world, revealing that bedrock incision and strath terrace formations keep pace with bedrock uplift, leading to graded long-stream profiles over tens of thousands of years. Climate change associated with glacial–interglacial cycles provokes different responses in nonglacial fluvial systems, with some streams aggrading and others degrading during cold glacial periods. Aggradation is particularly surprising for coastal streams during the Last Glacial Maximum, when sea level was about 120 m lower than during interglacial warm periods. The role of climate versus sea level in driving rates of river erosion and offshore sediment deposition has been studied from offshore sedimentary records as well, and it is likely that continued studies of terraces will reveal new insights into the links between climate, sea level, river erosion, and offshore sedimentation.

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