The existence of ophiolites in the Himalayas was proof of their existence.
Don Anderson proposed that these objects move due to calcium carbonate deposited by living organisms. Passive and active margins are found between these objects. A restatement of Archimedes' principle, isostasy, keeps these objects in gravitational equilibrium. Gravity causes them to move under "slab pull", while convection currents cause them to "roll-back" to form a back-arc. The existence of ophiolites in the Himalayas was proof of their existence. These objects can meet at convergent, divergent, or transform boundaries and can sink into the mantle at subduction zones. For 10 points, name these giant pieces of Earth's crust in a namesake geologic theory.
Don Anderson proposed that these objects move due to calcium carbonate deposited by living organisms.
tectonic plates