Types
Plagioclase Diorite and Quartz Diorite
Welded tuff, Rhyolitic tuff, Basaltic tuff, Trachyte tuff, Andesitic tuff and Ignimbrite.
Features
Typically speckled black and white.
Always found as volcanic pipes over deep continental crust
Archaeological Significance
Monuments
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Famous Monuments
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Easter Island in the Polynesian Triangle, Pacific Ocean
Sculpture
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Famous Sculptures
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Pictographs
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Petroglyphs
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Figurines
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Fossils
Absent
Absent