Types
Pumice Rocks, Obsidian Rocks, Perlite Rocks, Porphyritic Rocks.
Welded tuff, Rhyolitic tuff, Basaltic tuff, Trachyte tuff, Andesitic tuff and Ignimbrite.
Features
Acidic in nature, Available in lots of colors
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