Apollo-17 and traces of boulders

For the first time the author became interested in the traces when viewing images from the series Orbiter. They were shown a long track of objects that apparently slid down a hill. NASA has called them "boulders." Accidentally came up and another shot with a long trail of a moving object, but the most interesting was the material from the preliminary scientific report but the flight of Apollo 17 "(1973). Were measured and investigated 34 should be in the landing site Apollo 17. " The length of the tracks ranged from 0.1 km to 2.5 km at an average length of about 0.75 km. The width of the tracks, was up to 16 meters and an average width - more than 18 meters, the majority of objects, which include these tracks were 20-30% wider than the tracks themselves. Traces were found the groups, that is, in one beam on the slope would be 8 or 10 should be in another - a dozen, etc.

This intrigued. In order to push even the smallest of these "boulders", should be at least 20 people with long crowbars. I doubt whether a good bulldozer to cope with them. Even if you push a boulder from a place, you need a fantastic extra strength to get him to move on in dvadtsatipyatigradusnomu slope, the report shows a picture of this giant "boulder, which rolled down the slope. The angle of its location is such that he is not inclined to roll and shape - almost oblong. And it is huge, like a room. NASA recognizes that the reason all this rolling is unclear. And one more important and interesting fact: of the 34 studied traces in only eight cases could be "tied to a place" that caused this trail, "boulder". In other cases, the "boulder" or did not exist, or there were too many to identify whether''boulders "were doing a track?