Features of the Ocean Floor

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Presentation transcript:

Features of the Ocean Floor

MID OCEAN RIDGES CHAINS OF SUBMARINE VOLCANIC MOUNTAINS CREATE HYDROTHERMAL VENT ECOSYSTEMS

Mid-Ocean Ridges

Trenches DEEPEST PARTS OF THE OCEAN MARIANA’S TRENCH DEEPEST 1,580 MILES LONG 7-11 miles deep

Marianas Trench

SEA MOUNTS VOLCANO THAT DOES NOT RISE ABOVE SEA LEVEL

Hot Spot ACTIVE VOLCANIC ISLANDS REACH ABOVE SEA LEVEL EXAMPLE: HAWAII creation of new island

CONTINENTAL SHELF GENTLY SLOPING part of continent 8% OF OCEAN MOST BIOLOGICALLY RICH

CONTINENTAL SHELF

SUBMARINE CANYONS DEEP GROOVES CUT INTO CONTINENTAL SLOPES USED TO BE RIVER EDGES

CONTINENTAL SLOPE EDGE OF ACTUAL CONTINENT DEEP DROP OFF TO OCEAN BOTTOM

Upwelling will carry nutrients upward over corals, creating a nutrient rich environment

BIG DIFFERENCE FROM EAST TO WEST COAST

WEST COAST OF US

ACTIVE MARGINS

WEST COAST ACTIVE MARGINS Lots of Tectonic Activity & Steep Rocky Shorelines

PASSIVE MARGINS Flat Coastal Plains and Gradual Slopes

ABYSSAL PLAINS ABOUT 10,000 TO 13,000 FEET RELATIVELY FLAT area of deep ocean COVERED BY THICK LAYERS OF SEDIMENT

SONAR HOW WE MAP OCEAN FLOOR measuring the length of time a sound signal takes to return. Scientists "See" Ocean Floor via Sonar - YouTube

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