we know from geology that layers in the earth are sequenced in such a way that the oldest layers are the deepest, and on this basis we can date artifacts and fossils found in shallower layers as younger than those found in the deeper layers by using the principle of



Answer :

We use the principle of stratigraphy.

What is stratigraphy?

The scientific field of stratigraphy is concerned with describing geological successions and interpreting them in terms of a broad time scale. In addition to serving as the foundation for historical geology, petroleum geology and archaeology have both found use for its principles and methodologies.

Define sedimentary rock.

Sedimentary rocks are the focus of stratigraphic research, but they may also cover layered igneous rocks (such as those produced by successive lava flows) or metamorphic rocks that were created from either such extrusive igneous material or sedimentary rocks.

Subdivision of a sequence of rock strata into mappable units, figuring out the time relationships at play, and correlating individual units of the sequence—or the entire sequence—with rock strata elsewhere are all frequent objectives of stratigraphic investigations.

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