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The 7 billion humans alive in 2012 will almost certainly reproduce so that the world's population will become 14 billion in the foreseeable future.
Magmas
Molten rock stored beneath the Earth's surface, which may cool to form igneous rock or erupt as lava during volcanic activities.
Catskill Delta
An ancient delta located in what is now the northeastern United States, known for its rich sediments that tell a story of Earth’s geological past.
Foreland Basin
A structural basin that forms adjacent to a mountain belt, typically filled with sediments eroded from the mountains.
Passive Margin
A tectonically inactive edge of a continent along which there is no significant volcanic or earthquake activity, typically characterized by a broad continental shelf.
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