The gullies seen on Mars may not be due to recent small-scale water flows, but instead may be due to
A) marsquakes
B) landslides
C) dust storms
D) rain

Question

Quizplus · Accepted Answer

Several studies suggest that the gullies on Mars were likely formed by landslides rather than water flows. The presence of debris at the bottom of the gullies and the lack of visible channels that would have been formed by water indicate that the gullies may have been caused by landslides or rockfalls. In addition, simulations show that dry, flowing granular material can behave similarly to liquid water and could also contribute to the formation of gullies.

The Gullies Seen on Mars May Not Be Due to Recent