Sedimentary rock is comprised of sediment, as the name suggests. Over time, tiny minerals, sand, rocks, and debris layer on top of one another, with the pressure of the layers of ...

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.

To answer these questions, it is easiest to start with the amount of gold that humans have mined to date. The U.S. Geological ...

Igneous rock is formed by the cooling of molten rock, either at the surface (lava), or underground (as granite or other similar rocks). The heat of molten rock usually incinerates organisms rather ...

Places such as Purgatory Chasm and Millstone Hill, in Worcester's Green Hill Park, bear witness to the work of the glaciers.

“So far, the oldest rocks in which microbes have been found are 100-million-year-old seafloor sediments,” says Yohey Suzuki at the University of Tokyo. “We know it’s possible that microbes ...

Another possibility is that the rock is igneous and formed from volcanic activity. Mars has a long history of volcanism, and igneous rocks can range in tone depending on their mineral content.

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 ...

NASA’s Mars rover has spotted something out of this world — a mysterious, skull-shaped elevation – sitting on a slope where star-gazers say it doesn’t belong.. The mysterious rock ...

Igneous rocks form when magma from within the planet crystallizes and solidifies. Metamorphic rocks started out as something else but were significantly altered from their original state after ...