very level area of the deep-ocean floor, usually lying at the foot of the continental rise
an island consisting of a circular coral reef surrounding a lagoon
seafloor sediments consisting of material of marine-organic orgin
that portion of the seafloor adjacent to the continents. it may include the continental shelf, continental slope, and continental rise
The flat or gently sloping land that lies submerged around the edges of a continent and that extends from the shoreline out to a continental slope.
the steep gradient that leads to the deep-ocean floor and marks the seaward edge of the continental shelf
the gently sloping surface at the base of the continental slope
A narrow elongated depression on the floor of the ocean
A cone shaped deposit at the base of the continental slope. The sediment is transported to the fan by turbidity currents that follow submarine canyons.
An instrument used to determine the depth of water by measuring the time interval between emission of a sound signal and the return of its echo from the bottom.
A large, flat-topped seamount resulting from erosion of an island volcano when it was above sea level.
seafloor sediment consisting of minerals that crystallize from seawater; an important example is manganese nodules
an area where ocean water sinks through cracks in the ocean floor, is heated by the underlying magma, and rises again through the cracks
an underwater moutain chain where new ocean floor is formed
the escape of gases that had been dissolved in magma
deep valley formed along the divergent boundary
the relative proportion of salt in a solution
a measuring instrument that sends out an acoustic pulse in water and measures distances in terms of the time for the echo of the pulse to return
a seaward extension of a valley that was cut on the continental shelf during a time when sea level was lower, or a canyon carved into the outer continental shelf, slope, and rise by turbidity currents
an isolated volcanic peak that rises at least 1000 meters above the deep-ocean floor
seafloor sediment derived from weathering and erosion on land