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The considerable cultural differences between the large Nuer tribes and the smaller,less powerful Dinka tribes of southern Sudan indicates that
Black Smokers
Hydrothermal vents on the seafloor in which hot water from within the rock jets out into cold seawater and forms a cloud of minerals, especially those rich in sulfur.
Sulfide Minerals
Minerals composed of sulfide ions and one or more metals; important as ore minerals and for their chemical properties.
Fast-Spreading Ridge
A geological feature where tectonic plates are diverging at a rapid rate, leading to significant volcanic activity and the formation of new oceanic crust.
Hydrothermal Vents
Hydrothermal vents are openings in the sea floor from which heated mineral-rich water flows, often located near volcanically active places.
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