Examlex
The median age of the U.S.population now stands at twenty years.
Oceanic Crust
The part of Earth's lithosphere that underlies the ocean basins, composed mainly of basalt and gabbro.
Hot Spots
Volcanically active areas located usually in the middle of tectonic plates, characterized by hot magma rising from deep within the Earth's mantle.
Volcanically Active
Refers to a geographic area where volcanoes can erupt, showing signs of seismic, geothermal, or eruption activity.
Island Chains
Island chains are series of islands formed from similar geological processes, such as volcanic activity, and are often found stretching across regions of the ocean.
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