The index fossil, Phacops, has been found in New York State bedrock. What other index fossil could also be found in New York State bedrock of the same age: Lichenaria, Elliptocephala, Manticoceras, or Eospirifer?

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Hey! :)

Possibly the coral, Aulopora or the brachiopods, Mucrospirifer mucronatus & Palmatolepis unicornis

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