3 Erosional FeaturesWave Cut Cliffs- a feature of the ocean that forms from the cutting motion of the surf against land on the coastWave Cut Platform- an ocean form that is composed of flat, bench-like surfaces that were left behind from receding cliffsMarine 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 twocaves from opposite sidesjoin togetherSea Stacks: an oceanfeature that forms when thetop, or roof, of a sea archcollapses
5 Depositional Features Some depositional features originate when sediment is displaced by beach drift and longshore currentsSpits-elongated sand ridges that project from the land into the mouth of an adjacent bayBaymouth Bars-sandbars that cross a bay entirelyTombolos-sand ridges that connect an island to the mainland or to a different island
6 Depositional Features swaSea Spit off Turtle Island, TaiwanTombolo 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 riversthe degree of tectonic activitythe topography and composition of the landprevailing winds and weather patternsthe configuration of the coastline and nearshore areas
11 Hard StabilizationHard 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 shoreBreakwater- a structure guarding a nearshore area from breaking wavesSeawall- 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 StabilizationBeach nourishment; is done by the addition of sand to replenish beaches that are erodingRelocation; moving damaged and/or threatened buildings out of dangerous areas
15 Works CitedBali Sea Arch. N.d. Photograph. Natural Arches. Web. 26 May <http://www.naturalarches.org/gallery- Indonesia-Bali.htm>.Barrier Island. N.d. Photograph. Futurity. Web. 26 May <http://www.futurity.org/earth-environment/barrier- islands-more-abundant/>.Baymouth Bar. N.d. Photograph. So. California. Coastal Processes. Web. 26 May <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 <http://www.rakontur.com/journal/2008/9/4/working-on-the-1980s-miami-photo-book.html –>.Erosion and Landforms Movie. YouTube. Dianarabstejnek, 11 Apr Web. 26 May <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 Web. 26 May <https://www.youtube.com/watch?feature=player_embedded&v=vm9_1v-1eKc>.Sea Spit. N.d. Photograph. Turtle Island, Taiwan. Dreamstime. Web. 26 May <http://www.dreamstime.com/stock-image-aerial-view-sea-spit-image >.Stack. N.d. Photograph. Torre Sant'Andrea, Southern Italy. Wikipedia-The Free Encyclopedia. Web. 26 May <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, N. pag. Print.Tombolo California. N.d. Photograph. Tombolo California. Web. 26 May <http://geology.about.com/od/structureslandforms/ig/Depositional-Landforms/tombolo.htm –>.