Ancient Earth
Transported by wind more than 183 million years ago, tiny grains of quartzite sand covered much of what we now call Utah. These sand dunes, up to 2,500 feet thick, eventually were cemented into stone. Burnt orange to creamy white in color, Navajo sandstone, the predominant rock in the park, is what remains of the ancient desert sand sea. Over time, water has cut and shaped the sandstone to form canyons. Approximately 1.4 million years ago, and as recently as 27,000 years ago, nearby cinder cones erupted, causing lava to flow down these canyons, filling them with basalt. This redirected ancient waterways, eventually carving new canyons.
Ancient Earth
Transported by wind more than 183 million years ago, tiny grains of quartzite sand covered much of what we now call Utah. These sand dunes, up to 2,500 feet thick, eventually were cemented into stone. Burnt orange to creamy white in color, Navajo sandstone, the predominant rock in the park, is what remains of the ancient desert sand sea. Over time, water has cut and shaped the sandstone to form canyons. Approximately 1.4 million years ago, and as recently as 27,000 years ago, nearby cinder cones erupted, causing lava to flow down these canyons, filling them with basalt. This redirected ancient waterways, eventually carving new canyons.