Ehlmann and her team previously identified metamorphic rocks on Mars that she thinks could have formed when hot groundwater circulated through rocks buried underground, a relatively low-temperature, low-pressure process.

埃尔曼和她的团队之前在火星上发现了变质岩，她认为这些变质岩可能是热地下水在埋藏于地下的岩石中循环时形成的，这是一个相对低温、低压的过程。