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Chain coral (Halysites sp.) Bob Campbell Geology Museum 440 million year old; Formation: Allan Bay Formation; Donated: Jody Tinsley.
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Colonial horn coral (Hexagonaria sp.) Bob Campbell Geology Museum 325 million years old; Formation: Salem & Warsaw Formation.
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Coral 'Petosky Stone' (Hexagonaria percarinata), state stone of Michigan Bob Campbell Geology Museum 350 million years old; Donated: H. Abercrombie.
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Streptelasma sp., three incomplete corals, elongated, narrow and sharply tapering Bob Campbell Geology Museum Formation: Whitewood Formation.
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Hydractinia multispinosa, 7 fragments of shell-like chitinous material Bob Campbell Geology Museum Formation: Eastover Formation.
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Favosites canadensis, massive colony with long, narrow, closely packed corallites Bob Campbell Geology Museum Formation: Onandaga Limestone; Nedrow mem.
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