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Just north of Withrow, WA, pancake-flat fields are dotted with massive rocks that help us visualize an Ice Age glacier.

The range’s oldest bedrock sits high in the mountains near Canada. But the yellow aster gneiss originated an ocean away 400 million years ago.

Shifting glaciers revealed the North Cascade peak’s origins, forged from three ancient volcanoes that lived and died over the past million years.

Greenschist gets its tint from minerals compressed under the ocean long ago. Now it caps an entire mountaintop in the North Cascades.

Special thanks to Central Washington University as the original...

Sedimentary rock usually builds horizontally. So how does Big Four Mountain in Snohomish County have nearly vertical layers?

Geologists believe the formation was created by floods 16,000 years ago, but its ghostly hanging valleys tell a different story.

Towers at Saddle Rock were formed from 44-million-year-old vents of magma hidden deep under the Cascade mountains.

Host and geology professor Nick Zentner explores the Drumheller Channels near Othello — which resemble Southwest deserts — in the Season 5 premiere.

A small part of the American Rescue Plan provides direct, flexible dollars to compensate for untaxable national parks or other federally owned lands.

The final stretch of North Spokane Corridor construction reopens old wounds in East Central — and sparks a pilot program to address historical damage.