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Sum11.208.Structures - Stratigraphy The study of the origin...

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Rock Structures Mt. St. Helens, October 2004 Stratigraphy The study of the origin, relationship and extent of rock layers (Strata). Stratigraphic Units Supergroup Group A Formation A Member A Member B Member C Formation B Member D Member E Member F Formation C Member G Member H Group B Formation D Member I Member J Member K Member L Member M Formation E Member N Member O Member P Member Q Formation F Member R Member S Member T Supergroup | Group | Formation | Member | Bed Stratigraphy of John Day National Monument, Oregon
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Stratigraphy of Columbia Plateau, Washington Igneous Structures: Plutons, Volcanoes, & Lava Flows (Oh, My!) Plutons Name this Igneous Feature… Igneous Dike
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