The Chuckanut Mountains were formed by the folding of the Chuckanut Formation (which is predominantly made up of layers of 55-million-year-old sandstone, conglomerate, shale, and bituminous and sub-bituminous coal) and the later Huntingdon Formation (predominantly shale and sandstone) on top, as well as an exposed section of pre-Jurassic-age phyllite

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Wikipedia contributors. (2023, June 11). Chuckanut Mountains. In Wikipedia, The Free Encyclopedia. Retrieved November 16, 2023, from https://en.wikipedia.org/w/index.php?title=Chuckanut_Mountains&oldid=1159687292

Chuckanut Mountains (Wikipedia) The Chuckanut Mountains (from “Chuckanut”, an indigenous word meaning “long beach far from a narrow entrance”), or Chuckanuts, are located on the northern Washington state coast of the Salish Sea, just south of Bellingham, Washington. Being a part of the Cascade Range, they are the only place where the Cascades come west down to meet the sea. The Chuckanuts are considered to be a part of the Puget Lowland Forest Ecoregion.

And God said, “Let the water under the sky be gathered to one place, and let dry ground appear.” And it was so. Genesis 1:9 NIV