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・ Stratified epithelium
・ Stratified flow
・ Stratified flows
・ Stratified Morse theory
・ Stratified sampling
・ Stratified squamous epithelium
・ Stratifin
・ Stratifold
・ Stratiformis (sculpture)
・ Stratigos
・ Stratigotus
・ Stratigraphic column
・ Stratigraphic cycles
・ Stratigraphic section
・ Stratigraphic unit
Stratigraphy
・ Stratigraphy (archaeology)
・ Stratigraphy and Geological Correlation
・ Stratigraphy of the Cambrian
・ Stratinska
・ Stratioceros princeps
・ Stratiolaelaps
・ Stratiomyidae
・ Stratiomyinae
・ Stratiomyini
・ Stratiomyoidea
・ Stratiomyomorpha
・ Stratiomys
・ Stratiomys chamaeleon
・ Stratiomys longicornis


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Stratigraphy : ウィキペディア英語版
Stratigraphy

Stratigraphy is a branch of geology which studies rock layers (strata) and layering (stratification). It is primarily used in the study of sedimentary and layered volcanic rocks.
Stratigraphy includes two related subfields: lithologic stratigraphy or lithostratigraphy, and biologic stratigraphy or biostratigraphy.
==Historical development==

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.
The first practical large-scale application of stratigraphy was by William Smith in the 1790s and early 19th century. Smith, known as the "Father of English geology", created the first geologic map of England and first recognized the significance of strata or rock layering and the importance of fossil markers for correlating strata. Another influential application of stratigraphy in the early 19th century was a study by Georges Cuvier and Alexandre Brongniart of the geology of the region around Paris.

抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)
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