Sedimentary rock is comprised of sediment, as the name suggests. Over time, tiny minerals, sand, rocks, and debris layer on ...

A belt of swirly, stripey rock in the northeast reaches of Canada looks like it contains some of the oldest minerals ever ...

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

"Alternatively, ‘Skull Hill’ could be an igneous rock eroded from a nearby outcrop or ejected from an impact crater," Deahn continues. "On Earth and Mars, iron and magnesium are some of the ...

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 Perseverance rover has snapped an image of a mysterious rock embedded in the surface of Mars, and researchers aren't sure what to make of it.

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 ...

This image is from NASAs Mars Perseverance rover, taken by the Mastcam-Z. NASA's Mars rover has pictured a mysterious, skull-shaped rock on the Red Planet whose origin remains uncertain. The ...

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.

NASA have made a mind-boggling discovery on Mars – which may have come from an alien world. The peculiar “Skull Hill” rock has left scientists scratching their heads with its biza… ...

Another theory suggests that "Skull Hill" is actually an igneous rock, formed by the cooling of lava or magma. It could have happened a million or even a billion years ago. ...

NASA have made a mind-boggling discovery on Mars – which may have come from an alien world. The peculiar “Skull Hill” rock has left scientists scratching their heads with its biza… ...