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stratigraphy: Quick Facts

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stratigraphy
Diagram explaining Steno's four laws of stratigraphy in geology, with labeled illustrations for the law of superposition, original horizontality, cross-cutting relationships, and lateral continuity, showing how rock layers form and are altered.
Geochronology. Table 20: Stratigraphic Subdivisions of the Cretaceous Period
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Key People

Smith, William
William Smith
British geologist
Orbigny, engraving
Alcide Dessalines d’ Orbigny
French paleontologist
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Johann Gottlob Lehmann
German geologist
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Amadeus William Grabau
American geologist
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Amanz Gressly
Swiss geologist
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Georg Christian Füchsel
German geologist
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Albert Oppel
German geologist and paleontologist
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John Strachey
British geologist
Penck, Albrecht
Albrecht Penck
geographer
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Henri-François-Émile Termier
French geologist
Conybeare, William Daniel
William Daniel Conybeare
British geologist
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Maurice-Irénée-Marie Gignoux
French geologist

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