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Chapter 15 Section 3

Chapter 15 Section 3. Erosion and Deposition Ryan, Jack, Brooke, Jordan, and Becca. Majestic Ocean Sounds. Erosional Features. Wave Cut Cliffs - a feature of the ocean that forms from the cutting motion of the surf against land on the coast

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Chapter 15 Section 3

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  1. Chapter 15 Section 3 Erosion and Deposition Ryan, Jack, Brooke, Jordan, and Becca

  2. Majestic Ocean Sounds

  3. Erosional Features Wave Cut Cliffs- a feature of the ocean that forms from the cutting motion of the surf against land on the coast Wave Cut Platform- an ocean form that is composed of flat, bench-like surfaces that were left behind from receding cliffs • Marine Terraces are a type of wave cut platform that are uplifted

  4. Erosional Features • Sea Arches: an ocean • feature that forms when a • headland is eroded and two • caves from opposite sides • join together • Sea Stacks: an ocean • feature that forms when the • top, or roof, of a sea arch • collapses

  5. Depositional Features • Some depositional features originate when sediment is displaced by beach drift and longshore currents • Spits-elongated sand ridges that project from the land into the mouth of an adjacent bay • Baymouth Bars-sandbars that cross a bay entirely • Tombolos-sand ridges that connect an island to the mainland or to a different island

  6. Depositional Features • swa Sea Spit off Turtle Island, Taiwan Tombolo in California

  7. Barrier Islands: • These are low ridges of sand parallel to the coast at distances from 3 to 30 kilometers. • Most are from 1 to 5 kilometers wide and between 15 and 30 kilometers long. • Barrier Islands are formed in a few ways. Some were originated as spits and were separated from the mainland by wave erosion. • Others were formed when turbulent waters in the line of breakers piled up sand that had been scraped from the bottom.

  8. Barrier Islands: A marvelous picture of a barrier island

  9. Shoreline Erosional Problems 1) Bursts of accelerated erosion * impact the natural evolution of the coast *impact the lives of the people living on the coast -huge amounts of money are spent annually in order to repair erosional damage and to control erosion

  10. Factors of Shoreline Erosion • These five factors influence the amount of destruction caused by shoreline erosion: • the proximity of a coast to sediment-laden rivers • the degree of tectonic activity • the topography and composition of the land • prevailing winds and weather patterns • the configuration of the coastline and nearshore areas

  11. Hard Stabilization Hard Stabilization is any form of man made structure built to protect a coast or to prevent the movement of sand along a beach. Examples include groins, breakwaters, and seawalls

  12. Types of Hard Stabilization Groin- a barrier built at a 90 degree angle to the beach to catch sand that is moving parallel to the shore Breakwater- a structure guarding a nearshore area from breaking waves Seawall- a barrier created to stop waves from reaching the area behind the wall. Its purpose is to defend property from the damaging power of breaking waves

  13. Shoreline Erosional Problems • Alternatives to Hard Stabilization • Beach nourishment; is done by the addition of sand to replenish beaches that are eroding • Relocation; moving damaged and/or threatened buildings out of dangerous areas

  14. Erosion Video

  15. Works Cited Bali Sea Arch. N.d. Photograph. Natural Arches. Web. 26 May 2013. <http://www.naturalarches.org/gallery-Indonesia-Bali.htm>. Barrier Island. N.d. Photograph. Futurity. Web. 26 May 2013. <http://www.futurity.org/earth-environment/barrier-islands-more-abundant/>. Baymouth Bar. N.d. Photograph. So. California. Coastal Processes. Web. 26 May 2013. <http://www.greatneck.k12.ny.us/GNPS/SHS/dept/science/tuomey/Erosion_Deposition_Landscapes>. Before and After Miami Beach Nourishment Program. N.d. Photograph. Rakontur. Web. 26 May 2013. <http://www.rakontur.com/journal/2008/9/4/working-on-the-1980s-miami-photo-book.html –>. Erosion and Landforms Movie. YouTube. Dianarabstejnek, 11 Apr. 2011. Web. 26 May 2013. <https://www.youtube.com/watch?v=fztT507KivI&feature=player_embedded>. Into the Blue Ocean Sounds:Underwater Sound Water Sounds Nature Sounds Music Sleep Music Relax. YouTube. Meditationrelaxclub, 11 Oct. 2012. Web. 26 May 2013. <https://www.youtube.com/watch?feature=player_embedded&v=vm9_1v-1eKc>. Sea Spit. N.d. Photograph. Turtle Island, Taiwan. Dreamstime. Web. 26 May 2013. <http://www.dreamstime.com/stock-image-aerial-view-sea-spit-image11714961>. Stack. N.d. Photograph. Torre Sant'Andrea, Southern Italy. Wikipedia-The Free Encyclopedia. Web. 26 May 2013. <http://en.wikipedia.org/wiki/Stack_(geology)>. Tarbuck, Edward J., and Frederick K. Lutgens. "The Dynamic Ocean." Earth Science. 11th ed. Upper Saddle River, NJ: Prentice Hall, 1997. N. pag. Print. Tombolo California. N.d. Photograph. Tombolo California. Web. 26 May 2013. <http://geology.about.com/od/structureslandforms/ig/Depositional-Landforms/tombolo.htm –>.

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