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 ...

NASA’s Mars rover is on the trail of a geological mystery in the Jezero crater. While exploring an area known as Witch Hazel ...

The magma cools down and solidifies, leaving behind a mound of rock, like Traprain Law. Igneous intrusions can be found all around Scotland, not just in Edinburgh and Lothian. Some other examples ...

Igneous rock is formed by the cooling of molten rock ... which generally destroys any fossils that were in the rock before it was metamorphosed. For example, marble is created when limestone is ...

The rock was excavated from the Bushveld Igneous Complex in South Africa, an area known for its rich ore deposits. This is the oldest example of living microbes being found within ancient rock so ...

Scientists with NASA’s Perseverance rover are exploring what they consider a veritable Martian cornucopia full of intriguing rocky outcrops on the rim of Jezero Crater. Studying rocks, boulders, and ...