Question 1
What is the major difference between a subduction zone and a collisional mountain chain?
◦ A subduction zone has active volcanism.
◦ A subduction zone is a more advanced stage.
◦ There are no mountains created in a subduction zone.
◦ There is an ocean basin still present in the case of a collisional mountain chain.
Question 2
Most geologists think the elevation of mountains above sea level is limited by earth's gravity because ________.
◦ thickening of the crust in mountain belts produces a weak deep crust the spreads by gravity collapse, limiting the elevation
◦ rock cliffs are subject to gravity failure and can only be about 1km high
◦ rocks can never reach escape velocity
◦ the earth's mantle is too weak to support the load of large mountains
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