Gale is a crater, and probable dry lake, at 5.4°S 137.8°E in the northwestern part of the Aeolis quadrangle on Mars. It is 154 km in diameter and estimated to be about 3.5–3.8 billion years old. From Wikipedia
The detection of siderite in Gale Crater confirms significant carbon storage in Mars’ crust, providing new insights into the planet’s past climate and habitability.
