Pre-Olympia Pleistocene Stratigraphy and Chronology in the Central Puget Lowland, Washington

@inproceedings{Easterbrook1967PreOlympiaPS,
  title={Pre-Olympia Pleistocene Stratigraphy and Chronology in the Central Puget Lowland, Washington},
  author={Don J. Easterbrook and Dwight Raymond Crandell and Estella B. Leopold},
  year={1967}
}
Drifts of two pre-Olympia glaciations separated by nonglacial sediments are widespread in the central Puget Lowland of western Washington. The Double Bluff Drift (older) and Possession Drift represent advances of the Puget lobe of the Cordilleran ice sheet more than 40,000 years ago. The nonglacial Whidbey Formation between the drifts was formed in streams and lakes. During its deposition, climate was initially cool and moist, as inferred from pollen in peat beds, but subsequently it became… CONTINUE READING

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