ИСТИНА

We know from practices of geology that rock material slides along a plane of structural weakness such as a bedding plane. Although they are most common on steep slopes, they can even occur on slopes of 15o. We can see such slopes from 10o to 20o on the Moon. On the Earth millions of tons of rock may plunge down slope at speeds greater than 160 km per hour in what is often the most catastrophic form of mass wasting. On Mars, similar slope failures are possibly caused by erosion from “running” water. Howev-er, the lunar triggering mechanism of the down slope movement of the material remains unclear. It’s needed to study many questions regarding the stability of natural lunar slopes else. Moreover, it’s needed to note that resent studies show that new computer models simulating the creation of gullies on the surface of Mars suggest that they are in fact created by the flow of dry debris (i.e. landslides) and not by the flow of water.