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An active volcano is a volcano that has had at least one eruption during the past 10,000 years. An active volcano might be erupting or dormant. An erupting volcano is an active volcano that is having an eruption.
A Dormant volcanoes have not erupted for a very long time but may erupt at a future time. Extinct volcanoes are not expected to erupt in the future. Inside an active volcano is a chamber in which molten rock, called magma, collects.
Gradualism is the idea that rocks form over long periods through the slow geologic process.
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The supply of African slaves to American plantations reached an ... was completed in West Africa before it hit East Africa (Austen 1987, Law 2002). ... Today, China uses diplomacy in Africa instead of brute force, and it does ... may do more to stimulate African economic development than it did a century ago. Between the 1870s and 1900, Africa faced European imperialist aggression, ... against the attempt to colonize their countries and impose foreign domination. ... One way to demonstrate national preeminence was through the acquisition of .