chapter 3 vocab
Terms in this set (20)
a curved line of volcanoes that forms parallel to a plate boundary
an underwater mountain rising above the ocean floor
A conical volcanic feature on the ocean floor resembling a seamount except that it has had its top truncated to a relatively flat surface.
A gently sloping, shallow area of the ocean floor that extends outward from the edge of a continent
A cone-shaped sedimentary deposit that accumulates on the continental slope and rise.
a system for the detection of objects under water and for measuring the water's depth by emitting sound pulses and detecting or measuring their return after being reflected
an area of irregular, seismically inactive topography, marking the position of once active transform faults
Deep valley in the ocean floor that forms along a subduction zone
An underwater mountain chain where new ocean floor is formed
a continental margin that is not a plate boundary
Bedding in which the particle sizes become progressively heavier and coarser toward the bottom layers
A continental margin that is colliding with another plate and as a result is geologically active
a downslope movement of dense, sediment-laden water created when sand and mud on the continental shelf and slope are dislodged and thrown into suspension
a large, flat, almost level area of the deep-ocean basin
the gently sloping surface at the base of the continental slope
a steep incline of the ocean floor leading down from the edge of the continental shelf
Lava that cools underwater, taking on a distinctive pillow-like shape as it hardens
Area where the earth's lithospheric plates move in opposite but parallel directions along a fracture (fault) in the lithosphere.
an area where ocean water sinks through cracks in the ocean floor, is heated by the underlying magma, and rises again through the cracks
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
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