GEOL 101: Coastlines and Ocean Basins
GEOL 101: Coastlines and Ocean Basins 101-017
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This 3 page Class Notes was uploaded by Natalee Stanton on Wednesday April 20, 2016. The Class Notes belongs to 101-017 at University of South Carolina taught by in Winter 2016. Since its upload, it has received 8 views. For similar materials see Geology 101-017 in Geology at University of South Carolina.
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Date Created: 04/20/16
GEOL 101 Coastlines and Ocean Basins I. Costal Processes Waves o Caused by Wind velocity Wind duration Fetch (area over which the wind blows) Wind forces generate ocean waves Currents o Longshore currents (parallel to shore) Caused by waves approach at an angle to the shore Long shore drift Transport of sediment parallel to the shoreline Mainly in the surf and swash zone o Sand Rip currents Perpendicular to shore Tides o Direct result of gravitational attraction of the moon and sun on the ocean Lunar tides – Formed by the moon Solar tides Formed by the sun Spring tides When solar and lunar are in phase Neap tides When solar and lunar are out of phase o 28 day cycle The sand budget o The rate at which sand is supplied (input) to the beach, verse the rate at which it is being removed (output) II . Sea level change Sea level change due to warming o Melting of ice caps o Expansion of water in oceans Effects on beaches o Net erosion o loss of the beach III. Continental margins Continental shelf o Broad, flat platform underline from the continent Slope o Steeper o Muddraped slope o Dissected by submarine canyons o Influenced by submarine landslides Rise o Base of the slope o Include large submarine fans Abyssal plain o Not a lot of sediment o Seamounts submerged volcanoes o Flattest surface on the earth Types Passive Not on a plate boundary Active On a plate boundary Components o Shoreline o Shores, slopes and rises Sample Exam Questions The amount of windblown material that wind can carry does not depend on the ____. a. Particle size b. Surface material c. Temperature d. Wind strength Where does most volcanic activity on the seafloor take place? a. Abyssal plains b. Minocean ridges c. Continental shelves d. Oceanic trenches How deep is the deepest part of the ocean? a. About 1 Kilometer deep b. About 10 kilometers deep c. About 3 kilometers deep d. About 30 kilometers deep Which of the following currents erode and deposit finegrained sediments on the continental slope and rise? a. Longshore cure b. River currents c. Turbidity currents d. Tidal currents