Burgess-shale definition

bûrjĭs
A rock formation in the western Canadian Rockies containing a wealth of fossilized invertebrates of the early Cambrian Period that were buried by an underwater avalanche of fine silt, preserving many details of their soft parts and providing valuable information about the evolution of early life.
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A rock formation in the western Canadian Rockies that contains numerous fossilized invertebrates from the early Cambrian Period.
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A rock formation in the Canadian Rockies that contains very many fossils from the Cambrian period.
pronoun
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Origin of burgess-shale

  • After nearby Mount Burgess

    From American Heritage Dictionary of the English Language, 5th Edition