The Ocean. EARTH: The only planet w/ Oceans (or liquid water) Covers 71% of earth’s surface “Divided” into 4 large basins Pacific (largest, deepest) Atlantic Indian Arctic (smallest, shallowest) A fifth? The Antarctic…. Ocean basins. South pole view. Ocean Basin Depths.
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South pole view
Mid-Atlantic Ridge (above sea surface in Iceland)
Sea Floor Spreading:
X-section of sea floor @
Mid ocean ridge
@ ridge crests (but
Reversed in other
Continental + Oceanic plate collision = trench, earthquake
2 oceanic plates collide = trench/earthquake
An active margin
is a geologically
very “active” area;
Passive margin is a