Schematic horses and riding scenes are very similar to the Valcamonica ones. So cup-marks and grooves are more recent, probably first Iron Age. Likenesses can't be casuals, so they probably belong to the same culture. At Sonico they are covered by little shovels of the first Iron Age. Carschenna engravings are not easy to interpret.
Some scholars suggest a topographic key.
They were studied by C. Zindel and G. C. Borgna. The pictures have been taken with daily grazing light, obtained with sun and mirrors. Slides have been scanned by a slide transparency scanner.