NEW YORK (AP) — Scientists have identified what could be the oldest rocks on Earth from a rock formation in Canada. The ...

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

Igneous rocks — which form as magma solidifies either deep within Earth or at the surface after a volcanic eruption, for example — contain a limited number of minerals that crystallize, Richard Bevins ...

Sodalite forms in igneous rocks that crystallized from sodium-rich, silica-poor magmas. That’s how it got its name—soda + lithos, or “sodium stone," according to Rock Your World gem & art ...

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 ...

Instead, researchers are now exploring the possibility that Skull Hill could be a chunk of igneous rock, formed from cooling magma and potentially ejected by an impact event or uncovered by erosion.

According to scientists, these holes may have formed from the erosion of rock fragments or from the abrasive effect of Martian wind. The dark, smooth-surfaced rock at the center of this Oct. 30, 2016, ...

Since landing in the Jezero Crater in February 2021, the Perseverance rover explored a variety of Martian rock types. The rover collected samples from different rocks, analyzed others in detail ...

Another theory is that it’s an igneous rock, formed by cooled lava or magma, which could make it millions—or even billions—of years old. Deahn said the team is planning more tests to ...

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.

While the origin of the rock remains uncertain, NASA is of the view that pits on the Skull Hill may have been formed due to erosion, or it may have been dropped here by an "impact crater".

Another possible theory is that Skull Hill is an igneous rock formed when lava or magma cooled, possibly millions or billions of years ago. "Luckily for us, ...