Under the placed station located on the surface of Mars is about three meters of sandy regolith. Then, as a result of scanning, there is 20 meters of breccia formed as a result of meteorite falls. A layer of Amazonian basalts, followed by sedimentary rocks. And the last thing they were able to scan was a layer of Amazonian and Hesperian basalts. There is a version of the scientists’ version that sedimentary rocks lie below 175 meters.
Based on the data obtained, the researchers have built an assumption that the uppermost volcanic rocks (basalts) were formed about 1.7 billion years ago. The deepest — 3.6 billion years ago.
All these scanned layers are separated by sedimentary rocks. Most likely, these layers were formed when the climate on Mars changed — it became drier and colder.