Consult the figure below.Graded beds tell a geologist that a _____________.

Question

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Graded beds are sedimentary layers with a change in grain size from coarse at the bottom to fine at the top. This indicates that the sediments were deposited by a turbidity current, which is a type of sediment-laden density flow that occurs when sediment is stirred up by a disturbance on the seafloor or in a river. As the turbidity current slows down, it drops its sediment load with the coarser sediment settling out first and the finer sediment settling out later. Therefore, graded beds tell a geologist that a turbidity current deposited these beds, depositing coarser material first.

Consult the Figure Below