Editing Cretaceous Period
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===Stratigraphic Subdivisions=== | ===Stratigraphic Subdivisions=== | ||
[[File:Exposed KT boundary.jpg|thumb|350px|right|A bluff in South Dakota, showing the Stratigraphic subdivisions and the K-T boundary clearly]] | [[File:Exposed KT boundary.jpg|thumb|350px|right|A bluff in South Dakota, showing the Stratigraphic subdivisions and the K-T boundary clearly]] | ||
The Cretaceous is divided into Early and Late Cretaceous epochs or Lower and Upper Cretaceous series. In older literature the Cretaceous is sometimes divided into three series: Neocomian (lower/early), Gallic (middle) and Senonian (upper/late). A subdivision in eleven stages, all origining from European stratigraphy, is now used worldwide. In many parts of the world, alternative local subdivisions are still in use. | The Cretaceous is divided into Early and Late Cretaceous epochs or Lower and Upper Cretaceous series. In older literature the Cretaceous is sometimes divided into three series: Neocomian (lower/early), Gallic (middle) and Senonian (upper/late). A subdivision in eleven stages, all origining from European stratigraphy, is now used worldwide. In many parts of the world, alternative local subdivisions are still in use. |