william smith proposed the principles of stratigraphy to relatively date rock layers.
william smith proposed the principles of stratigraphy to relatively date rock layers.
who proposed the principles of stratigraphy to relatively date rock layers?
william smith
biostratigraphy or paleontologic stratigraphy is based on fossil evidence in the rock layers. strata from widespread locations containing the same fossil fauna and flora are said to be correlatable in time. biologic stratigraphy was based on william smith's principle of faunal succession, which predated, and was one of the first and most powerful lines of evidence for, biological evolution. it provides strong evidence for the formation (speciation) and extinction of species. the geologic time scale was developed during the 19th century, based on the evidence of biologic stratigraphy and faunal succession. this timescale remained a relative scale until the development of radiometric dating, which gave it and the stratigraphy it was based on an absolute time framework, leading to the development of chronostratigraphy.
stratigraphy
stratigraphy









































stratigraphy is a branch of geology concerned with the study of rock layers (strata) and layering (stratification). it is primarily used in the study of sedimentary and layered volcanic rocks.









































stratigraphy has two related subfields: lithostratigraphy (lithologic stratigraphy) and biostratigraphy (biologic stratigraphy).









































section::::historical development.









































catholic priest nicholas steno established the theoretical basis for stratigraphy when he introduced the law of superposition, the principle of original horizontality and the principle of lateral continuity in a 1669 work on the fossilization of organic remains in layers of sediment.
stratigraphy