W10_103_4a_stratigraphy2

W10_103_4a_stratigraphy2 - Boundaries: Conformable Bed...

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Boundaries: Conformable Bed Contacts Gradational Sharp Boundaries: Unconformities Gaps in Rock = Gaps in Time
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Types of Unconformities: Nonconformity Nonconformity - Grand Canyon
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Using Inclusions to Recognize a Nonconformity Types of Unconformities: Angular Unconformity
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Formation of an Angular Unconformity Angular Unconformity in the Grand Canyon
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The Angular Unconformity at Siccar Point, Scotland Source: Edward A. Hay, De Anza College, Cupertino, CA Types of Unconformities: Disconformity
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Formation of a Disconformity Walther’s Law Johannes Walther (1860-1937)
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Concept of Sedimentary Facies Sedimentary Facies refers to all of the characteristics of a particular rock unit. The characteristics of the rock unit come from the depositional environment. Facies Depositional Environments Facies Example A = Sandstone facies (beach environment) B = Shale facies (offshore marine environment) C = Limestone facies (far from sources of terrigenous input) Facies Change
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Marine Transgression = Sea Level Rise Marine Regression = Sea Level Fall
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W10_103_4a_stratigraphy2 - Boundaries: Conformable Bed...

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