Continental Margins in addition to Ocean Basins Continental Margins Three Main Divisions Continental Shelf Continental Slope Submarine Canyon

Continental Margins in addition to Ocean Basins Continental Margins Three Main Divisions Continental Shelf Continental Slope Submarine Canyon www.phwiki.com

Continental Margins in addition to Ocean Basins Continental Margins Three Main Divisions Continental Shelf Continental Slope Submarine Canyon

Beeaff, Sterling, Music Director has reference to this Academic Journal, PHwiki organized this Journal Continental Margins in addition to Ocean Basins Continental Margins Three Main Divisions Continental shelf Continental slope Continental rise Continental Shelf Submerged part of the continent Slopes gently toward ocean basin (<1°) Composed of continental crust Shelf ends at shelf break – boundary between shelf in addition to steeper slope Gallaudet University US www.phwiki.com

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Continental Slope Boundary between continental in addition to oceanic crust Steeply sloping compared to shelf (5-25°) Submarine canyons are major features Extends from shelf break to rise Submarine Canyon Origin of submarine canyons: river erosion turbidity currents Submarine Canyon Turbidity Currents Turbidites are layered in addition to exhibit graded bedding (decrease in sediment grain size from bottom to top) Downslope movement of dense mixture of clay, silt, s in addition to in addition to water Deposits are called turbidites

Continental Rise At base of continental slope Slope angle decreases Caused by the accumulation of sediment Continental Margins Types Passive Margin Active Margin Continental Margin Passive No plate boundary Little tectonic activity Thick sediment accumulation Wide continental margin

Continental Margin Active Convergent plate boundary Trenches are boundaries Tectonically active Thin accumulation of sediments Narrow continental margin Continental Margin Passive vs. Active Passive Margins Major rivers drain into ocean Sediment transported by river builds out shelf Active Margins Large rivers uncommon Irregular shelves Active Continental Margin Southern Cali as long as nia Santa Monica Bay 3-D shaded relief map

Active Continental Margin Southern Cali as long as nia Ocean Basin Floor Features Seamounts in addition to Guyots Coral Reefs in addition to Atolls Ridges in addition to Rises Abyssal Plain Trenches Ocean Basin Floor Covers about 30% of Earth’s surface Contain abyssal plains, deep sea trenches, in addition to seamounts Begins at base of continental rise Sedimentation: Passive in addition to turbidity currents

Ocean Basin Floor Abyssal Plain Flat, deep ocean floor Depth may be 2-3 miles or more Thick sediment accumulation covers oceanic crust Ocean Basin Floor Deep Sea Trenches Occur at subduction zones where oceanic crust is as long as ced downward into mantle Associated with earthquakes in addition to volcanoes Deepest is Mariana Trench (11,020 m) Longest is Peru-Chile trench (5,900 km) Ocean Basin Floor Ridges in addition to Rises Contain central rift valleys 15-50 km wide 500-1,500 m deep Offset by fractures Underwater volcanic mountain chain Extends as long as 65,000 km 1,000 km wide 1,000-2,000 m high Ridges = steep slopes Rises = gentle slopes

Ocean Basin Floor Seamounts in addition to Guyots Seamounts are underwater volcanoes as long as med along ocean ridges or over hot spots May be eroded flat on top in addition to called Guyots May emerge as an isl in addition to Ocean Basin Floor Coral Reefs in addition to Atolls Volcanic isl in addition to s (from seamount) as long as m in warm latitudes Fringing coral reefs as long as m in shallow, sunlit waters Dormant volcano subsides in addition to flattens (becomes a guyot) Actively-growing reef becomes a barrier reef in addition to then an atoll

Beeaff, Sterling KBAQ-FM Music Director www.phwiki.com

Beeaff, Sterling Music Director

Beeaff, Sterling is from United States and they belong to KBAQ-FM and they are from  Tempe, United States got related to this Particular Journal. and Beeaff, Sterling deal with the subjects like Music Programming

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This Particular Journal got reviewed and rated by Gallaudet University and short form of this particular Institution is US and gave this Journal an Excellent Rating.