Everything about The Principle Of Lateral Continuity totally explained
The
principle of lateral continuity states that layers of
sediment initially extend laterally in all directions; in other words, they're laterally continuous. As a result, rocks that are otherwise similar, but are now separated by a
valley or other
erosional feature, can be assumed to be originally continuous.
Layers of sediment don't extend indefinitely; rather, the limits can be recognized and are controlled by the amount and type of sediment available and the size and shape of the
sedimentary basin. As long as sediment is transported to an area, it'll eventually be deposited. However, as the amount of material lessens away from the source, the layer of that material will become thinner.
Often, coarser-grained material can no longer be transported to an area because the transporting medium has insufficient energy to carry it to that location. In its place, the particles that settle from the transporting medium will be finer-grained, and there will be a lateral transition from coarser- to finer-grained material.
If sufficient sedimentary material is available, it'll be deposited up to the limits of the sedimentary basin. Often, the sedimentary basin is within rocks that are very different from the sediments that are being deposited. In those cases, the lateral limits of the sedimentary layer will be marked by an abrupt change in rock type.
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