Geologists recently dated the age of Watersmeet gneiss, a type of rock in the Upper Peninsula, as the oldest in the U.S. Here ...

NASA has found a rock on Mars that it has dubbed Skull Hill. The rock is known as a "float rock," and NASA has no idea where it came from.

Pumice is an example of extrusive igneous rock. The word extrusive means that the magma was forced onto the earth's surface and cooled in a matter of hours. Granite is an example of intrusive ...

Scientists at Nasa have discovered an out-of-place rock formation that has left researchers baffled about its origins. Dubbed ...

Some believe that 'Skull Hill' could be an igneous rock that got eroded from a nearby outcrop, or was pushed out of an impact crater. To verify the claim, researchers need to ensure that the rock ...

UNIFORM with the “Rock Minerals” of the same author, now in its second edition, the work which Prof. Iddings has now completed will take an assured place as the fullest and most comprehensive ...

There are three main types of rock: igneous rock, metamorphic rock, and sedimentary rock. Almost all fossils are preserved in sedimentary rock. Organisms that live in topographically low places (such ...

Igneous intrusions are a type of rock feature. They form when molten rock cools below the surface of the Earth. Join Isla and Connor as they explore igneous rock landscape features at Traprain Law ...

Another theory is that Skull Hill is an igneous rock formed when lava or magma cooled, possibly millions or billions of years ago. Such rocks are common on both Earth and Mars and often contain ...