Respuesta :
Stratigraphic formation consists of a sequence of similar rocks that can be found across a region.
A subfield of geology called stratigraphy studies rock layers (strata) and layering (stratification). It is mostly applied to the study of layered volcanic rocks and sedimentary rocks.
Lithostratigraphy (lithologic stratigraphy), biostratigraphy (biologic stratigraphy), and chronostratigraphy are three related subfields of stratigraphy (stratigraphy by age).
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.
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.
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