 | Climbing Red Rock Canyon, Nevada
Beginning climbers get a few pointers before taking their first trip up the rock at Red Rock Canyon in Nevada.
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| Geological History of Alabama - Part 2
Careful examination of fossil history reveals that dinosaurs were indeed present in Alabama, and that sea levels rose and fell many times over the ages.
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| Icefall Photographer
A Vermont outdoor photographer captures his love of rock and ice through his art.
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| Beginning Rock Climbing
A rock climbing novice gets a few tips from a seasoned climber as she ascends a basalt column near Vantage, Washington.
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| Digging the Past
A search for fossils among Maryland's sedimentary stone reveals an amazing array of plant life as well as a number of sea-dwellers.
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| Digging the Past - Part 2
A group of Maryland students get a hands-on education as they search for fossils in the countryside.
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| Climb On
A pair of climbers practice their skills and techniques on a challenging rock face.
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| An Introduction to Rock Climbing in Icicle Canyon
Climbing instructor Matt Ward introduces the necessary equipment for, and basic techniques of, rock climbing.
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| Geological History of Alabama - Part 1
From the fiery beginning of the planet to the cool seabeds that spawned life on Earth, geological history can be studied by examining rocks in the ground.
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| Clean Climbing
As the sport of rock climbing grows in popularity, it becomes even more important to keep climbing areas clean.
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| Introducing Kids to Rock Climbing
Adventure Bound is a Maine company that specializes in introducing kids to outdoor sports, including rock climbing.
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| Rock Climbing in Acadia National Park
A pair of beginners get an introduction to rock climbing on the seaside cliffs of Acadia National Park.
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| Kartchner Caverns - Discovery
Discovered by two men in 1974, Kartchner Caverns in Arizona was kept secret from the public for 14 years; then it became a state park.
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| Kartchner Caverns - Geology and Development
Kartchner Caverns was formed by plate movement, water and minerals; later, people developed the cave so that it could be visited and protected.
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| Kartchner Caverns - Cavern Formations
The action of water dripping for hundreds of thousands of years, rich with minerals, created Kartchner Caverns' delicate cave formations.
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| Geology Field Trip - Part 1
A geology trip takes students through northern Mexico where they learn about geological events and the natural history of the region.
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| Theodore Roosevelt National Park - Geology
A long geological history is written in the walls of the badland canyons and the pillar-like hoodoos in North Dakota at Theodore Roosevelt National Park.
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| Glacier National Park - Water, Rock and Ice
Named after the massive rivers of ice that carved its landscape, Montana's Glacier National Park supports a thriving alpine ecosystem.
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| Siskiyou National Forest - Mountaintop
Oregon's Siskiyou National Forest, which sits at the crossroads of two mountain ranges, offers a great diversity of plants.
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| Mount Rogers, Virginia - Lowlands
A snow-dusted open field, a laurel thicket and a rushing creek are among the diverse habitats found at Mount Rogers.
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| Colorado National Monument - Juniper Forest
On a dry plateau in Colorado National Monument, brushy juniper and prickly yucca spring up from the rocky soil; a cottontail rabbit browses on sagebrush.
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| Colorado National Monument - Canyon
In a geological drama easily visible from above, shifting earth and eroding wind and water slowly shaped the land that is now Monument Canyon.
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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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| Rabbit Valley, Colorado - Dinosaur Fossils
Surrounded by the living plants and animals of Rabbit Valley, Colorado, the fossilized bones of dinosaurs have rested in sandstone for millions of years.
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| Valley of Fires, New Mexico - Lava Flow
The most recent lava flow on the continental United States took place at New Mexico's Valley of Fires National Recreation Area.
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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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| Acadia National Park, Maine - Ridge
Glacial activity was responsible for carving down the granite mountains, shaping what is now Acadia National Park in Maine.
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| Kelleys Island, Lake Erie - Limestone Quarry
Layers of silt deposited by an ocean now long gone became the layers of fossil-filled limestone visible today at Ohio's Kelleys Island.
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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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| The Geologic History of Isla Coronados
Isla Coronados and the other islands in the Sea of Cortez have been formed by a combination of plate tectonic, volcanic and earthquake processes.
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| Desert Stone: Rock Climbing
In Arizona's Dragoon Mountains, climbers find plenty of the vertical rock that they crave.
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| Mexican Galapagos - Isla Partida Norte
A series of complex geological events formed the Isla Partida Norte, which is now the home of several unique species of animals.
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| Flooding the Grand Canyon - Part 2
Research teams gather data to determine the effect of a controlled flood on the geography and ecological systems of the Grand Canyon.
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| Shenandoah National Park - Appalachian Trail
Virginia's Shenandoah National Park encompasses diverse mountain and forest habitats.
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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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| Lake Tahoe - Lake Edge
The rounded boulders of Lake Tahoe are continuously being weathered and shaped by chemical and physical factors.
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| Catalooche Valley - Roadside
The hillside along a road is a great place to observe the geology of the Catalooche Valley and a variety of wildflowers.
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| Devils Tower, Wyoming
Igneous rock pushed through the earth's surface millennia ago and then the material around it eroded away, leaving what is now known as Devils Tower.
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| Blanchard Springs, Arkansas - Cavern
Water full of dissolved minerals, dripping and flowing through caves over the millennia, formed colorful cave formations visible today at Blanchard Springs.
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| Sinkholes - Part 1
Although they have the potential to cause great damage, sinkholes are more often just a fascinating part of Florida's geology.
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| Sinkholes - Part 2
Sinkholes occur when water in underground aquifers erodes away the ground until it can no longer support its own weight and sinks in.
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| Sinkholes - Part 3
Due to Florida's vast network of underground springs, sinkholes have the potential to conduct pollution from runoff directly into the water supply.
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| Tucson Gem and Mineral Show
Professional and hobbyist mineral collectors from around the world gather each year at the Tucson Gem and Mineral Show to display and sell their pieces.
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| Arizona Gem and Mineral Show
Dealers from around the world come to the various satellite shows of the Tucson Gem and Mineral Show to sell their rare mineral specimens.
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| Mountain Building in the Desert - Part 1
The shaping and reshaping of the of the Sonoran Desert over millions of years has defined the weather and plant life of the region.
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| Mountain Building in the Desert - Part 2
During the periods when the mountains of the Sonoran Desert were being built, the region's rich mineral and crystal deposits were also forming.
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| Mountain Building in the Desert - Part 3
During the Mid-Tertiary Deformation, the mountains of southern Arizona were profoundly stretched and thinned.
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| Mountain Building in the Desert - Part 4
The unique landscape of Arizona's Basin Range has had a profound effect on the climate and plant life of the region.
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| The Delicate Habitat of Kartchner Caverns
The unique, pristine environment of Kartchner Caverns reveals the delicate balance of nature.
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| Surveying Caves on Prince of Wales Island
Local members of the National Speilogical Society survey and map some of Alaska's remote and unexplored caves so they can be preserved and managed.
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| Waterfall Climbing
Climbing up the icy face of a frozen waterfall can be thrilling, but is also a sport for the experienced.
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| Lake Pend Oreille
Lake Pend Oreille is one of Idaho's great destinations for artists, climbers and anglers.
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| Smith Rock Climbing
Smith Rock in Oregon is a world-class rock climbing site, attracting top climbers from around the globe.
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| Hiking in Canyon Sin Nombre
The slot canyons and rugged terrain of Canyon Sin Nombre offer many examples of how water and erosion have transformed the desert landscape.
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| Hiking the Mountain Palm Springs Trail
A hike on the Mountain Palm Springs Trail reveals hidden desert palm groves and a variety of interesting geologic formations.
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| Hiking the Culp Valley Ridge Trail
The Culp Valley Ridge Trail runs through the more varied and lush vegetation of the high desert and offers spectacular views of the desert floor below.
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| Caving in Kartchner Caverns State Park - Part 1
Kartchner Caverns is a unique living cave in southwest Arizona that was originally discovered and protected by two college students.
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| Caving in Kartchner Caverns State Park - Part 2
Great care was taken to study, document and preserve Kartchner Caverns before opening it to visitors.
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| Green River Cave
In Kentucky's Mammoth Cave area, the Green River flows into one cave, making it explorable by canoe.
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| Carter Caves State Park
One of Kentucky's earliest tourist attractions, the Carter Caves offer viewers unique geological wonders.
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| Kentucky's Mantle Rock Nature Preserve
Rich in natural diversity and human history, the Nature Conservancy's Mantle Rock Nature Preserve also encloses an unusual sandstone glade ecosystem.
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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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| Hell Hole, Oregon
A giant split in the ground in the Oregon Cascade Mountains is evidence that the mountains are slowly cracking apart.
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| Climbers on the Grand Tetons
Experienced rock climbers reflect on the challenges of scaling the Grand Tetons.
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| Iowa's Slate and Sand
Learn how Iowa's geological history formed the deposits of various rocks and minerals that are used today.
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| Iowa Geodes
Iowa is famous for its geodes - hollow spherical rocks lined with mineral crystals.
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| Iowa's Geology - Fossils, Sediments and Loess
Iowa's geological history can be traced back through the layers in the earth.
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| Northwest Iowa Plains - Pilot Rock
Pilot Rock in northwestern Iowa was formed by a retreating glacier at the end of the last ice age.
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| Northern Iowa's Karst Topography
Northeastern Iowa features underground systems of limestone rock which act as a natural plumbing system, filtering, collecting and releasing water.
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| Hidden River Cave and Kentucky Caverns
Water carving through limestone rock has produced many of Kentucky's caves, which now attract visitors to explore and learn about cave science.
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