Types
Plagioclase Diorite and Quartz Diorite
Nepheline-Basanite, Analcite-Basanite and Leucite-Basanite
Features
Typically speckled black and white.
Clasts are smooth to touch, Easily splits into thin plates, Has High structural resistance against erosion and climate, Used as a touchstone
Archaeological Significance
Monuments
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Famous Monuments
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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