What marks the Amazonian Period in Mars’ history?

The Amazonian Period in Mars' history is characterized primarily by low-rate cratering. This era, which extends from about 3 billion years ago to the present, indicates that the surface of Mars has been relatively stable over a long time period, with fewer impacts from meteoroids and asteroids compared to earlier times in Mars' history. This stability suggests a lack of significant geological processes that would lead to large changes on the landscape, effectively allowing for the preservation of surface features that were formed during earlier periods.

The low-rate cratering provides insights into the planet's climatic and geological evolution, suggesting periods of quiescence where erosion and sedimentation could alter features slowly without the interference of frequent impacts.