Deep below the Tyrrhenian Sea offshore Italy, scientists drilled into what they thought would be dark mantle rock—and found pieces of granite that seemingly had no business being there. Those ...

A 245-foot sequence of ancient Martian rock appears to have formed from debris deposited by repeated asteroid impacts. ・Glassy beads, once-molten fragments, and recurring layers show that impacts of ...

Evidence is preserved in ancient volcanic and sedimentary rocks dating back to the Archaean age, between 4 billion and 2.5 billion years ago. These rocks are found in the oldest parts of what are ...

Two test methods put the rocks at 4.16 billion years old The volcanic rocks date to primordial Earth's Hadean eon Rocks are surviving fragments of Earth's oldest crust June 26 (Reuters) - Along the ...

In celebration of National Rock Day, learn how several rock specimens in the new exhibition “From These Lands” shed light on the nation’s geological heritage ...

About 4.5 billion years ago, a Mars-sized object smashed into the young Earth, spraying debris that coalesced to form the moon, many scientists think. Some remnants of that object, called Theia, exist ...

The rock cycle naturally takes thousands to millions of years, but scientists just identified a new form of rock that cements in under four decades. Researchers believe the natural cements found in ...