But on closer inspection, that's not the only set of holes it has ... was made out of basalt, igneous or volcanic rocks that are common on both Mars and Earth. The rock and many like it may ...

Sodalite forms in igneous rocks that crystallized from ... Silica (silicon dioxide) solutions flow into the hole in the host rock and fill it up over time, making the bands, the news release ...

It looked like an igneous rock on Earth that had salt-rimmed holes in it — holes that had probably formed as water flowed through the rock. That meant the rover was looking at an ancient ...