Criterion (viii): The geological conformation of Tassili n'Ajjer includes Precambrian crystalline elements and sedimentary sandstone successions of great paleo-geographical and paleo-ecological ...

Red Rock Canyon is characterized by a series of canyons and parallel, sandstone ridges, (called “hogbacks”), sculpted by erosion because of the area’s uplifted strata.

Geologists confirm that industrial waste turns into rock in just 35 years, challenging traditional ideas about geological ...

The frontispiece plate is a photograph (salted paper print) of a rock slab with dinosaur tracks found at Greenfield, Mass., Warren's Remarks on some fossil impressions (1854) has been described in ...