Lecture 15

Lecture 15 - Consider where erosion, transport, and...

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Unformatted text preview: Consider where erosion, transport, and deposition of Consider sediment might occur near the Fraser River of Harri son L ake Canada Canada 07.00.a Riv Fraser er Vancouver, B.C. Strait of Georgia Close-up Close-up view view Observe these land environments and consider the kind of sediment present at each Mountains Glacier Gentle, Gentle, meandering river river Delta Steep stream Steep or river or Lake Sand Sand dunes dunes Wetlands 07.01.a1 Observe these environments and their sediment sediment Glacier Glacier Mountains Steep stream Steep or river or 07.01.a Sand dunes Observe these environments Observe and their sediment sediment Gentle, Gentle, meandering river river Delta Delta 07.01.a Wetlands Lake Observe these environments near shorelines and in Observe oceans and consider the kind oceans Tidal flat of sediment present at each at Beach Lagoon Lagoon Reef Barrier Barrier island island Deep seafloor 07.02.a1 Delta Coastal Coastal dunes dunes Offshore Offshore delta delta Observe these environments Observe and their sediment sediment Coastal Coastal dunes dunes Beach 07.02.a Lagoon Reef Observe these environments Tidal flat Delta 07.02.a Deep Deep ocean ocean Making Sediment: Physical Weathering Fracturing Frost and mineral Frost wedging wedging Roots and Roots other biologic activity activity 07.03.a1 Making Sediment: Chemical Weathering Dissolution Hydrolysis Oxidation Biological Biological reactions reactions 07.03.a1 Clast Sizes Sand: Coarse, medium, fine Boulders, cobbles, Boulders, pebbles pebbles Clay and silt 07.04.a Observe the range of clast Observe size (sorting) in each photograph photograph Moderately sorted Poorly sorted 07.04.a Well sorted Observe the shape of Observe these clasts these Partially rounded Angular 07.04.a Rounded Controls on Size, Shape, and Sorting Farther from source means rounder and smaller Steepness of Steepness slope slope Strength of current Agent of transport 07.04.b How Clastic Sediment Becomes Rock Compaction of Compaction sand grains sand Compaction of Compaction clay particles clay Cementation 07.05.a Common Clastic Sedimentary Rocks Conglomerate Breccia 07.05.b Sandstone Shale Rocks Formed by Chemical Reactions Setting Rock Salt Setting Travertine (limestone) 07.06.a Rocks Formed by Organisms 07.06.a Setting Limestone with fossils Setting Coal Other Nonclastic Sedimentary Rocks Gypsum Chalk Dolostone Chert 07.06.b ...
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This note was uploaded on 01/24/2011 for the course GEOL 100 taught by Professor Martin during the Fall '08 term at Maryland.

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