Simulation of sediment deposition on the continental shelf and slope, demonstrating how layers build up over time to create an impermeable barrier.
Learn MotionWhy Oceans Don't Drain Into the Ground
The Continental Shelf and Slope
Sediment Accumulation and Sealing
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Over millions of years, rivers carry billions of tons of sediment from the land into the ocean. On the continental shelf, this material settles in thick, compact layers. Clay and fine silt are particularly effective at blocking water flow. As these layers build up, they pressurize the underlying rock, closing any remaining pores. This creates a natural seal that prevents ocean water from seeping down into the crust below.
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