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Scenery at Theodore Roosevelt National Park, North Dakota, USA
Big Horn County, Montana, USA - September 6, 2011: A marker commemorates Wooden Leg Hill by the Battle of Little Bighorn National Monument where Native American warriors charged in 1876.
Stunning rock formations in Capital Reef National Park, Utah, USA. Lots of unique shapes made out of red, orange and grey stones.
Palo Duro Canyon State Park, Texas, USA: eroded cliff side - Geologic time periods marked by major changes in the fossil record - rock strata covering the Permian age, Triassic age, Miocene-Pliocene age and at the top the Quaternary age - this cliff includes the Permian-Triassic (P-T) extinction boundary, colloquially known as the Great Dying, that took place about 248 million years ago. The extinction was caused by climate change. The main cause of extinction was the vast amount of carbon dioxide emitted by volcanic eruptions that created the Siberian Traps, which elevated global temperatures and acidified the oceans. Geological time scale, part of the Caprock Escarpment - Texas Panhandle.
Scenic overlook at Cedar Breaks National Monument in Utah
Unique underground geology of  stalactites and stalagmites.
Petrified wood, 20 million years old wood. Wood turned into stone
Wide angle view of the famous Painted Wall of Black Canyon of the Gunnison in Colorado. This Canyon displays some of the steepest cliffs and oldest rocks in North America. The Gunnison River (in a shadow of the  bottom), with two million years of erosion work, has sculpted this vertical wilderness in hard, dark-colored Precambrian gneiss, which had been later crosscut with light pegmatite dikes.
Anasazi Granary in Rock Alcove Sandstone Cliffs Kaiparowits Plateau Utah
A sedimentary rock on the dirt road in the countryside
Wide View of Cedar Breaks National Monument in Utah in United States, Utah, Cedar City
Summer scenery at Theodore Roosevelt National Park, North Dakota, USA
Mesa Verde National ParkMesa Verde National Park
Beautiful canyon view of the Grand Canyon National Park.
False colour TEM micrograph. Olfactory nerve showing the ensheathing glia (nucleus, blue, cytoplasm green, basal lamina, pink) surrounding many non-myelinated axons (brown) of olfactory neurons.\
Along the Harper’s Corner trail in Dinosaur National Monument in Colorado, a view to the east reveals Echo Park where the Green and Yampa Rivers meet at Steamboat Rock in towering sandstone canyons.
A view looking north of the Colorado Flatirons, located in Boulder, Colorado. This photo was taken at the climax of a hike that reached the top of an adjacent flatiron. The view north shows brown fields and foothills stretching up the front range. Photo taken in February, before any springtime growth. Colors of blue, brown, green.
Henrieville is a town in Garfield County, Utah, United States.
Parco naturale nell'Utah
Summer scenery at Theodore Roosevelt National Park, North Dakota, USA
Cedar Breaks National Monument is a natural amphitheater canyon at an elevation of ten thousand feet stretching three miles wide and over a half mile deep near Cedar City, Utah.
Layered maroon and light speckled  rock magnified.
Upheaval Dome, Canyolands National Park, Utah - United States
Abandoned open pit mine
A chert conglomerate from the Fig Tree Formation of the Barberton greenstone belt
Aerial view over Apex peak in the Cederberg Mountains near Cape Town in South Africa
Arkaim, Chelyabinsk region, Russia - August, 24, 2021: Collection of rocks. The inscription on the plate: Yashma (No. 25), Aleksandrovsky settlement, Kizilsky district. A class of minerals based on siliceous rock. The color is very different, often striped or spotted. Known to man since the Paleolithic era - weapons and tools were made from it. Used in arts and crafts, jewelry. Ural deposits are the richest and most famous
Summer scenery at Theodore Roosevelt National Park, North Dakota, USA
Hazy, polluted, poor air quality sky over the canyon of Dinosaur National Monument Colorado
The North Dakota Badlands in Southern Theodore Roosevelt National Park
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