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Geology The Rainbow Range is an eight-million-year-old ( Miocene ) massive peralkaline shield volcano in the Anahim Volcanic Belt which includes the lower but similar Itcha and Ilgachuz Range s. The shield has a diameter of is now heavily eroded by glacier s carving into the volcanic rock and sand s over millions of years .
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Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
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