GEOL3032_Final_exam_Study_Guide[1]

GEOL3032_Final_exam_Study_Guide[1] - Sedimentology...

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Sedimentology Final-Exam Study Guide The final exam (DECEMBER 11 at 3-5 pm) will have three parts. Part 1 will have 11 multi-part questions divided into 4 groups (A-D) corresponding to chapters 8, 9, 10 and 11. You will have to answer two questions from chapter 8, two questions from chapter 9, one question from chapter 10 and one question from chapter 11. Part 2 will have 15 terms for which you will need to provide a definition. Part 3 will have 12 figures from the PowerPoint lectures with blanks for which you will have to provide the requested information. You should know the following information. Chapter 8 1. Definitions, characteristics and architecture of two primary types of fluvial systems -- Fluvial Deposits sediments generated by activites of rivers, streams and associated gravity flow processes. -- Alluvial Fans Are convex up, cone-shaped sediment deposits; they are usually poorly sorted with abundant gravel-sized detritus (grains). Downslope network of distributary channels The long profile, from fan-head to fan-toe, is concave upward. Greatest slope at fan apex and decreases down the fan Cross-fan profile is generally convex up. Gravelly deposits Down-fan decrease in grain size and bed thickness Down-fan increase in sorting Usually thickening and coarsening upward successions from active AF growth Common in areas of high relief, such as the bases of mountain ranges, fault scarps and canyon bases. Arid-semiarid regions where sediment transport occurs infrequently but with great violence during cloudbursts; alluvial fans move down slope into desert-floor environments with internal drainage, including playa lake environments. Humid regions where rain fall is more intense, they merge downslope with alluvial or deltaic plains and beaches or tidal flats, or they may even build into lakes or the ocean. Fan Deltas Alluvial fans that build into standing bodies of water (lakes or ocean). Bajadas Alluvial Fans that develop latterly along a mountain front and become inter grown with one another. -- Debris-Flow Dominated AF’s Characterized by lobes of poorly sorted, coarse sediment, commonly with a muddy matrix. (As flows emerge from confined channels in a mountain front onto a fan, they are free to spread out, and water may infiltrate into the fan. Stream power is thus reduced, leading to deposition. Sediment gravity flows, including debris flows and mudflows, are dominant processes on many fans in both arid-semiarid regions and humid settings.) Poorly sorted
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GEOL3032_Final_exam_Study_Guide[1] - Sedimentology...

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