One of the key indicators has been whether or not fragments of oceanic crust, generated at sea-floor spreading centers, are preserved in the planet's oldest crust. New research integrating what has ...

Deep beneath the Earth’s surface, researchers have uncovered striking new evidence of ancient seafloor ... between the crust and the core. Their findings reveal a dense slab of oceanic crust ...

Despite covering 66% of Earth's surface, the deep ocean remains largely unexplored. The study, "How Little We've Seen: A Visual Coverage Estimate of the Deep Seafloor," is the first to document ...