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Noun: guide fossil  gId fó-sul
  1. A fossil known to have lived in a particular geologic age that can be used to date the rock layer in which it is found
    - index fossil

Derived forms: guide fossils

Type of: fossil

Encyclopedia: Guide fossil

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Guiana
Guiana Highlands
guib
Guibert of Ravenna
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guide word
guidebook
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guided missile
guided missile cruiser
guided missile destroyer
guided missile frigate