Geologic story behind the rock layers below the Perrine Bridge, near Twin Falls, in southern Idaho

Join geology professor Shawn Willsey as he takes you into the Snake River Canyon for an up close investigation of the distinct rock layers and their fascinating geologic story. Here we will explore the rocks below the iconic Perrine Bridge, near the town of Twin Falls, and its scenic canyon overlook and visitor center. These rocks start with the story of the Yellowstone volcano when it resided in the Twin Falls region and culminates with recent eruptions of fluid lava from local volcanoes. You can learn more about southern Idaho geology by purchasing Geology Underfoot in Southern Idaho and Roadside Geology of Idaho. Both available locally or on Amazon. Approximate GPS location: 42.60194, -114.45361

"Slip Slidin' Away": The 1993 Bliss Landslide, a dramatic earthflow that diverted the Snake River
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"Slip Slidin' Away": The 1993 Bliss Landslide, a dramatic earthflow that diverted the Snake River

HUGE Boulders Transported by a Megaflood in Southern Idaho: a geologist's tour
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HUGE Boulders Transported by a Megaflood in Southern Idaho: a geologist's tour

The BEST waterfalls in Twin Falls, Idaho! (Perrine Coulee, Ritter Island, & Shoshone Falls)
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The BEST waterfalls in Twin Falls, Idaho! (Perrine Coulee, Ritter Island, & Shoshone Falls)

Lava vs. Water: The Fascinating Geology of Idaho's Menan Buttes
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Lava vs. Water: The Fascinating Geology of Idaho's Menan Buttes

"Old" Yellowstone in southern Idaho: amazing deposits of pyroclastic flows from explosive eruptions
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"Old" Yellowstone in southern Idaho: amazing deposits of pyroclastic flows from explosive eruptions

Oregon Is Hiding Something Nobody Talks About
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Oregon Is Hiding Something Nobody Talks About

Dangerous Grindstone Installation in 1971
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Dangerous Grindstone Installation in 1971

A 2-Mile Deep Lost World Above the Grand Canyon
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A 2-Mile Deep Lost World Above the Grand Canyon

Santorini 1614 BC
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Santorini 1614 BC

Southern Idaho's Balanced Rock area records an explosive and nonexplosive volcanic history
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Southern Idaho's Balanced Rock area records an explosive and nonexplosive volcanic history

Random Roadcuts #21: Spectacular Roadcut on Idaho's Banks-Lowman Road
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Random Roadcuts #21: Spectacular Roadcut on Idaho's Banks-Lowman Road

50 Insane Geography Facts About Idaho You Didn't Know
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50 Insane Geography Facts About Idaho You Didn't Know

Secrets of groundwater: Thousand Springs State Park and the amazing Snake River Plain Aquifer, Idaho
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Secrets of groundwater: Thousand Springs State Park and the amazing Snake River Plain Aquifer, Idaho

The Biggest Lava Flow on Earth (Might Be in Michigan)
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The Biggest Lava Flow on Earth (Might Be in Michigan)

Why 60,000 People Live on a Rock with Zero Resources
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Why 60,000 People Live on a Rock with Zero Resources

The Most Impossible to Reach Mountains on Google Earth
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The Most Impossible to Reach Mountains on Google Earth

Why Is Colorado Building a 22 MILLION TON Rock Wall in the Rocky Mountains?
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Why Is Colorado Building a 22 MILLION TON Rock Wall in the Rocky Mountains?

Geology of Shoshone Falls and the Snake River canyon in south central Idaho (Part 2 of 2).
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Geology of Shoshone Falls and the Snake River canyon in south central Idaho (Part 2 of 2).

Where and Why We Find Columbia Basin Agates in Eastern Washington: A Story of Ancient Rivers
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Where and Why We Find Columbia Basin Agates in Eastern Washington: A Story of Ancient Rivers

Why These Badlands are Unlike Anywhere Else in the Southwest
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Why These Badlands are Unlike Anywhere Else in the Southwest