Slideshow 101.12 Sedimentary Rocks - Weathering

Slideshow 101.12 Sedimentary Rocks - Weathering -...

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Sedimentary Rocks and Environments Sedimentary Rocks and Environments Sedimentary Rocks Overview Weathering Soil Classification of Sedimentary Rocks Sedimentary Structures Sedimentary Environments Sedimentary Basins
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Sedimentary Rocks and Environments Sedimentary Rocks and Environments Sedimentary Rock is formed from Sediment Sediment is Unconsolidated Fragments of: mineral grains, rock pieces, shell fragments precipitated crystals includes materials like sand, mud and gravel Sedimentary Rocks form by: 1) Cementing together of clasts 2) Growth of shells by organisms 3) Precipitation of minerals directly from a solution
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Sedimentary Rocks and Environments Sedimentary Rocks and Environments Weathering is the process by which rocks and minerals break down at or near the Earth’s surface Erosion : the process by which moving water, wind, ice, or gravity carries pieces of weathered rock away from the bedrock and deposits them somewhere else Weathering
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Sedimentary Rocks and Environments Sedimentary Rocks and Environments Weathering breaks down rocks and minerals and Erosion transports the weathered fragments away. Together they create Sediment - the raw material for sedimentary rocks. Sediment: unconsolidated particles created by the weathering and erosion of rock, precipitated from water, or secretions of organisms.
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Sedimentary Rocks and Environments Sedimentary Rocks and Environments Two Types of Weathering: Mechanical Weathering Chemical Weathering
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Sedimentary Rocks and Environments Sedimentary Rocks and Environments Mechanical Weathering: breaks a mineral or rock into smaller pieces without changing their chemical makeup. Creates more surface area.
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Sedimentary Rocks and Environments Sedimentary Rocks and Environments Mechanical weathering processes 1. Frost wedging 2. Crystal growth 3. Thermal Expansion & Contraction 4. Exfoliation 5. Biological 6. Abrasion
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