Mantle plumes are important geologic processes—they interact with plate tectonics, create rich mineral deposits, and even ...

Hess proposes sea-floor spreading 1960. Photo: Harry Hess argues that the continents had once been one, and have drifted apart. With the discovery of plate tectonics and the mapping of the earth into ...

Jingchuan Wang said: "This thickened area is like a fossilized fingerprint of an ancient piece of seafloor that subducted into the Earth approximately 250 million years ago.

Such "spreading ridges" are cracks in the Earth formed where the planet's tectonic plates moved apart and molten material called magma came up to fill them, the researchers said.

University of Maryland scientists uncovered evidence of an ancient seafloor that sank deep into Earth during the age of dinosaurs, challenging existing theories about Earth’s interior structure.

Ancient sunken seafloor reveals earth's deep secrets. ScienceDaily. Retrieved June 2, 2025 from www.sciencedaily.com / releases / 2024 / 09 / 240927173212.htm. University of Maryland.