From about 128 km away, they hauled huge basalt boulders, from which to carve colossal heads, and nearly 100 other sculptures.
Magnetic investigation of an amphibolite boulder found on the white line showed that a strong electric current indeed traversed the boulder.
Adjacent to active border faults to the east and west, sheet- and debris flow-dominated alluvial boulder conglomerates accumulated.
Many additional examples of boulders, tracks and boulders at the ends of tracks can be seen in later spacecraft images.
Samples from the normal smooth surface of the gneiss boulder show that the surface has been ground and polished during glacial transportation.
Their outlines are made of large boulders and their interiors are filled with heat-radiating quartz and quartzite river cobbles.
This suggests that the quarrying might have involved a process of splitting large exposed boulders and selecting appropriate blocks.
Villagers and farmers at group meetings indicated their understanding of village boundaries with reference to features such as trees, boulders and road junctions.
