1. Rivers 11.1 – 11.2

3. Zones in rivers From Miller’s Living in the Environment

4. Youthful rivers http://levyc.victorschools.org/Science%20Materials/Un it%204%20Web%20Files/Three_Stages_of_River_Devel opment-geoteach.pdf http://levyc.victorschools.org/Science%20Materials/Un it%204%20Web%20Files/Three_Stages_of_River_Devel opment-geoteach.pdf Narrow V shaped Velocity is fast Current is strong Steep sides No floodplain Erosion occurs at bottom Moves boulders – sand – fine sediments

5. Young rivers NC mountain river http://ykonline.yksd.com/distanceedcourses/Courses/ EarthScience/lessons/FourthQuarter/Chapte r12/12 -2.html http://www.nc-flyfishing.com/wnc-trout-streams

6. Mature rivers http://levyc.victorschools.org/Science%20Mat erials/Unit%204%20Web%20Files/Three_Stag es_of_River_Development-geoteach.pdf http://levyc.victorschools.org/Science%20Mat erials/Unit%204%20Web%20Files/Three_Stag es_of_River_Development-geoteach.pdf U shaped Narrow floodplain Medium velocity Moves medium – small sediments Erosion occurs at edges

7. Mature rivers flyfishingspirit.com http://www.localyte.com/attraction/58618-- Bheri-RiverFishing-Trip--Nepal--Gandaki-- Pokhra

8. Old age rivers http://levyc.victorschools.org/Science%20Mat erials/Unit%204%20Web%20Files/Three_Stag es_of_River_Development-geoteach.pdf http://levyc.victorschools.org/Science%20Mat erials/Unit%204%20Web%20Files/Three_Stag es_of_River_Development-geoteach.pdf Broad U shape Wide floodplain Slow moving Moves fine sediments Erosion occurs at edges

9. Old age rivers Yukon River, Alaska ak.water.usgs.gov

10. Deposition The rocks, soil and sediments that are eroded by the steam or river are deposited downstream. In water On land

11. Deposition in water Delta – Formed when a river empties into a lake or the ocean. – Fan-shaped deposit – Mississippi delta – Gulfsci.usgs.gov

12. Placer deposits – Heavy minerals deposited in stream or river – Gold deposits http://nevada-outback-gems.com/basic_prospecting/dredge_tony.jpg Deposition in water

13. Deposition on land Floodplains – Areas along a river that receives sediment when river overflows its banks http://www.google.com/imgres?imgurl=http://www.kidsgeo.com/images/flood- plain.jpg&imgrefurl=http://www.kidsgeo.com/geology-for- kids/0080-floodplains.php&usg=__Tr- Kn3FKtUfHboeCHkBYNZ_Fhsg=&h=334&w=400&sz=40&hl=e n&start=1&zoom=1&tbnid=_dQJsiBEMjfnFM:&tbnh=104&tb nw=124&ei=BiwbTuzdHYnegQes4ews&prev=/search%3Fq%3 Dfloodplain%2Bimages%26um%3D1%26hl%3Den%26biw%3 D1138%26bih%3D535%26tbm%3Disch&um=1&itbs=1&biw= 1138&bih=535

14. Deposition on land Alluvial fans – Fan shaped deposits form on dry land

15. Homework Read pages 308 - 319

16. Output Write out & illustrate the following vocab words: – Gradient – Discharge – Load – Bed load – Flood plain – Suspended load – Deposition – Delta – Alluvial fan