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What types of volcanic rock are common on Easter Island?
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Easter Island
Sculptures cut from volcanic rock, Easter Island.
Easter Island is a volcanic island formed by three extinct volcanoes, which are primarily composed of tuffâa porous rock created from compacted volcanic fragmentsâand joined by lava flows.1
The island's landscape is dominated by eroded lava fields where obsidian is commonly found. Additionally, these fields are densely packed with lumps of cellular and tuffaceous lava that appear in black or rusty colors.1