The PIXL, which is an X-ray fluorescence spectrometer, was used to determine the fine-scale elemental composition of Martian surface materials, allowing the scientists to remotely dive deep into ...

While Monument Valley’s buttes and mesas can reach up to 1,000 feet (300 meters) above the valley floor and cover an area of 145 square miles, the Martian mounds reach 1,800 feet (550 meters ...