A layer of rock just 520 million years old sat directly on top of ancient rock dating back 1.4 to 1.8 billion years.

In 1869, John Wesley Powell was studying layers of rock in the Grand Canyon when he noticed an unconformity in the layers. Around a billion years were missing, and the problem turned out to be global.

A massive meteorite strike 3.5 billion years ago left behind the world’s oldest known impact crater, challenging previous ...

The discovery could usher in a wave of investigations into the evolution of Earth’s mantle, a layer of material about 1,800 miles deep that extends from just beneath the planet’s thin crust to its ...

In the whole history of Earth's climate, few events are as extreme as those that geologists call "Snowball Earth." ...

A thin slice of the ancient rocks collected from Gakkel Ridge near the North Pole, photographed under a microscope and seen under cross-polarized light. Field width ~ 14mm. Credit: E. Cottrell, ...

A new study traces a 120-million-year-old 'super-eruption' to its source, offering new insights into Earth's complex geological history. Geologists led by the University of Maryland and the University ...

Researchers studying the deep biosphere, Earth’s largest ecosystem, have found evidence that life thriving miles below the ...

Science in the silver age: Aetna, a classical theory of volcanic activity -- Some Neo-Platonic and Stoic influences on mineralogy in the sixteenth and seventeenth centuries -- Mechanical mineralogy -- ...

We know Aotearoa New Zealand is home to many geographically and biologically special features. Yet few of us know it also has ...

A thin slice of the ancient rocks collected from Gakkel Ridge near the North Pole, photographed under a microscope and seen under cross-polarized light. Field width ~ 14mm. Analyzing rocks in thin ...