What makes scientists think that the gullies was not formed by volcanoes?

Scientists believe the gullies were not formed by volcanic activity due to their distinct characteristics that resemble erosion processes caused by liquid water. The presence of features like branching patterns and flow dynamics aligns more closely with the action of water rather than lava flows. Additionally, geological studies and the lack of volcanic materials in the vicinity support the conclusion that these formations are primarily the result of sedimentary processes, likely influenced by climatic factors.