 | Ubehebe Crater in Death Valley
A recent volcanic explosion created this massive crater, whose windy, hostile environment is home to only a few hearty shrubs and some unusual flowers.
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| Painted Hills and Fossil Beds
Volcanic ash formed the multicolored hills in central Oregon; nearby fossil beds reveal that lush forests covered the region millions of years ago.
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| Geological Activity at the Salton Sea
Positioned on the San Andreas Fault, the Salton Sea is the site of significant geothermal activity, some of which has been harnessed for energy.
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| Geology Field Trip - Part 2
Geology students study hot springs in Mexico to better understand what is happening beneath the earth's crust.
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| Haleakala, Hawaii - Volcano
Millions of years of volcanic activity have resulted in the dazzlingly-colorful and unique landscape of Mount Haleakala on the island of Maui.
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| Hawaii Volcanoes National Park - Kilauea
A massive crater emitting steam and gasses and surrounded by lava flows, Mount Kilauea is one of the most active volcanoes in the world.
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| Hawaii Volcanoes National Park - Rocky Coast
The continuous action of waves on black volcanic rock creates the fine black sand found on the beaches of Hawaii.
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| Valley of Fires, New Mexico - Volcanic Rock
The movement of geological plates is apparent where basalt flowed through cracks in the Earth's surface, creating what is now Valley of Fires.
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| Crater Lake National Park - Rim Trail
The Rim Trail around Crater Lake offers many spectacular views, as well as evidence of how the lake was formed through volcanic activity.
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| Desert Islands in the Sea of Cortez
The chain of islands running along the lower Baja Peninsula in the Sea of Cortez offers biological diversity and provides evidence of geologic upheavals.
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| Lake Tahoe - Geology
Located on the border between California and Nevada, Lake Tahoe is the largest alpine lake in North America.
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| Mount Rainier, Washington - Alpine Zone
Alpine flowers abound on the summer slopes of Mount Rainier, a volcanic peak formed as a result of plate tectonics.
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| Mount St. Helens - Blast Zone
The cataclysmic eruption of Mount St. Helens in 1980 left vast scars on the landscape still obvious today.
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| Crater Lake Floor Map
Using advanced mapping technology, scientists are able to study the varied contours of the bottom of volcano-formed Crater Lake.
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| Mount Edgecumbe, Alaska
Alaska's Mount Edgecumbe, now apparently peaceful, was once a center of violent volcanic activity.
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| Pacific Volcanoes
Researchers study volcanoes on the ocean floor to determine whether human activity might have some effect on them.
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| Expedition to the Pinacate - Part 1
In 1907, an expedition of white gentlemen set out to explore one of the most desolate regions of the Sonoran Desert, the volcanic fields of the Pinacate.
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| Expedition to the Pinacate - Part 2
In 1907, an expedition of white gentlemen set out to explore one of the most desolate regions of the Sonoran Desert, the volcanic fields of the Pinacate.
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| Expedition to the Pinacate - Part 3
In 1907, an expedition of white gentlemen set out to explore one of the most desolate regions of the Sonoran Desert, the volcanic fields of the Pinacate.
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| Christmas Valley, Oregon - Part 1
Geological wonders abound in Christmas Valley, Oregon, such as Hole-in-the-Ground, Fort Rock, Fremont, Fort Rock Cave, the Devil's Garden and Derrick Cave.
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| Oregon's Balancing Rocks
Giant pillars of volcanic ash topped with precariously balanced rocks create one unique, ancient rock formation that can be found in Oregon.
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| Axial Volcano
Despite the highly toxic environment, scientists study an undersea volcano and the organisms that thrive there.
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| Iowa's Natural History
Find out how the four major prehistoric eras shaped the land that is now Iowa.
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| Newberry Crater Submerged Campsite
Thousands of years ago a volcanic event disrupted the lives of native people living in eastern Oregon, burying their homes.
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| Yellowstone Park in Winter
Yellowstone National Park is a place of geological complexity and scenic beauty, which is sharply visible in the winter season.
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