Oceans Coastal Processes.

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Presentation transcript:

Oceans Coastal Processes

NAUSET BEACH, CAPE COD

DO NOW: LIST 5 THINGS YOU KNOW ABOUT OCEANS... Jones beach on left and Nauset Beach on right HOW DO OCEANS AFFECT EARTH’S SURFACE?

Over 71% of earth’s surface is covered with ocean water Average oceanic depth is around 4km(that’s higher than Mt. Everest) Most of the sediment on land will erode into the oceans

Sodium chloride is the most common salt found in the ocean-others include Mg, Ca, and K) If ocean water evaporates, the salt concentration will rise and precipitate out of solution (sedimentary rock)

Salt Pillars the Dead Sea is the lowest point on dry land- around 1,350ft below sea level- found near Jordan-first Roman spa...

How does the ocean water transport sediment? Longshore Transport: transport along shoreline due to waves-erodes shoreline Waves: caused by wind

Waves Wind pushes water into a wave (oscillates) The wave flattens out with decreasing depth Breaks when the top of wave is too far ahead of bottom

Beach Structures due to Geologic Activity Jetty: these are man made structures used to prevent beach erosion

Barrier Islands- carved out by waves Barrier Islands along Rhode Island

Sand Bar- deposit of sediments due to wave action

Terraces: raised beach due to crustal uplift Pacific beach terraces

Baymouth Bar-formed by Longshore current closes off bay baymouth bar Lake Winnepeg Manitoba, Canada

Spit: formed by longshore current - opened

Wave Cut Cliff

Sea Stack

Volcanoes National Park - Holei Sea Arch, Kona, United States