Mars isn’t a bright, fire-engine red, but the iron oxide in its rocks makes it appear redder than other planets, especially ...

They can vary from light gray to pale red to dark rust. “Weathering decomposes the rock, releasing minerals such as iron, which oxidizes to give rock a reddish-pink color. During burial and ...

They can vary from light gray to pale red to dark rust. “Weathering decomposes the rock, releasing minerals such as iron, which oxidizes to give rock a reddish-pink color. During burial and ...