Our planet has been asteroid-smashed, melted and eroded, enough that most of its original armor has been long buried. Except ...

Yooperlites are a variety of sodalite-rich syenite found in the Upper Peninsula of Michigan.

Marble. Chalk. The Giant’s Causeway. All made of rock but all different. Learn all about the three different types of rock found on Earth with BBC Bitesize.

When NASA’s Perseverance rover touched down in Jezero Crater in 2021, scientists expected to find rocks laid down by an ancient lake. What they didn’t expect was volcanic rock. And certainly not a ...

These rocks really shouldn't be there. When you purchase through links on our site, we may earn an affiliate commission. Here’s how it works. The surprising discovery of volcanic, "igneous ...

In a recent study, geologists say Michigan is home to the oldest known rock in the nation. Watersmeet gneiss is found in Michigan's Upper Peninsula. Minnesota's Morton gneiss previously held the ...

Igneous rocks are the "new kids" in the rock cycle. They're the new rock on the block, ready to start fresh. Basalt lava flow in Hawaii, a perfect example of an extrusive igneous rock.

The Archean eon lasted from about 4 billion to 2.5 billion years ago. A very large global magmatic event took place from 2.9 to 2.7 billion years ago, with massive outpourings of lava creating ...

Approximately 4.5 billion years ago, prior to the formation of a solid inner core, the planet was believed to be a huge blob of liquefied rock. In the course of time, this molten mess grew a ...