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Nannofossils in Eocene Eugeosynclinal Limestones, Olympic Peninsula, Washington

Abstract

LIMESTONE lenses occur within a thick sequence of Eocene volcanic rocks (known as the Crescent or Metehosin Formation) that border the northern, eastern and southern sides of the Olympic Peninsula in north-western Washington State. These carbonate rocks have previously been thought to have a largely inorganic origin1, but electron microscopy, which I report here, indicates the presence of abundant nannofossils and suggests a different origin.

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References

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GARRISON, R. Nannofossils in Eocene Eugeosynclinal Limestones, Olympic Peninsula, Washington. Nature 215, 1366–1367 (1967). https://doi.org/10.1038/2151366b0

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