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One of the real surprises in store for us as we began to section specimens of petrified wood from the Vantage and certain other horizons in Central Washington, was the prevalence of a spruce type hardly hinted at in the leaf lists as published for the various sediments of Yakima time (upper miocene?).
Beck, G. F. (1936). Spruce in the Western Miocene. Northwest Science, 10(4), 18-20.
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