Deep Seafloor Features Mapping the seafloor – Bathymetry- study and mapping of seafloor elevations...
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Deep Seafloor Features • Mapping the seafloor – Bathymetry- study and mapping of seafloor elevations – Techniques • Early explorers measured depth with rope • Echo sounder- determines depth by measuring the time required for sound to leave a ship, reflect off the bottom, and return
Deep Seafloor Features Mapping the seafloor – Bathymetry- study and mapping of seafloor elevations – Techniques Early explorers measured depth with rope
Deep Seafloor Features Mapping the seafloor Bathymetry- study
and mapping of seafloor elevations Techniques Early explorers
measured depth with rope Echo sounder- determines depth by
measuring the time required for sound to leave a ship, reflect off
the bottom, and return
Slide 3
Mapping the seafloor Techniques Multibeam sonar system- takes
several sounding at a time; faster Satellites- measure very large
scale sea floor features by determining changes in sea surface
elevation
Slide 4
Deep seafloor features Continental shelf- nearly flat borders
on the edge of continents that slope toward ocean basins
Continental slope- steep slope extending to seafloor
Slide 5
continental rise- gentle slope formed at the base of the
continental slope, formed by accumulated sediments
Slide 6
Deep seafloor features Abyssal Plain- vast plain extending
seaward from base of continental slope Mid- ocean ridge- underwater
mountain range, typically having a valley known as a rift running
along its spine
Slide 7
Deep Seafloor features Seamount- steep sided volcanoes rising
abruptly, sometimes piercing the sea surface to become islands
Guyot- flat- topped seamounts Trench- long, narrow depressions of
the sea floor; deepest parts of the ocean