URL details: www.hayden-island.com/stop3/
URL title:
Stop #3 — Geologic History | Hayden Island
URL description:
Geologic History The Columbia River Gorge is up to 4,000 feet deep and stretches 80 miles from Troutdale through the Cascade Range to The Dalles, Oregon. https://youtu.be/w7eqBtc2tv0 The Columbia River Gorge began forming as far back as the Miocene (roughly 17 to 12 million years ago), and continued to take shape through the Pleistocene (2
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