Such maps reveal the volcanic mid-ocean ridges (e.g., Atlantic ) where oceanic plates spread apart, linear volcanic ridges formed by passage of migrating plates over relatively fixed volcanic hot spots (e.g., Hawaii in the mid-Pacific and Reunion in the Indian ocean), and deep troughs or trenches associated with subduction (downward faulting) of oceanic plates beneath overriding continental margin or intra-oceanic volcanic arcs.
(Such maps; reveal; the volcanic mid-ocean ridges (e.g., Atlantic ) where oceanic plates spread apart) (deep troughs or trenches; associated; with subduction (downward faulting) of oceanic plates) (oceanic plates; spread apart; ) (subduction; downward faulting; ) (linear volcanic ridges; formed; by passage of migrating plates over relatively fixed volcanic hot spots)
Such maps deep troughs or trenches oceanic plates subduction linear volcanic ridges
reveal associated spread apart downward faulting formed
the volcanic mid-ocean ridges (e.g., Atlantic ) where oceanic plates spread apart
with subduction (downward faulting) of oceanic plates
by passage of migrating plates over relatively fixed volcanic hot spots