Interestingly, some of them appear blotchy hammered texture make a stone lined, long. Some of them are regarded as extraction of a stone that has been cut and pry up a rectangle bar is typical.
Interestingly, Some rocks appear dark lump hammer stone into holes arranged in a line. Some stone cubes were undercut by a groove cut off. And a stone was cut and break up the rectangular bars are common.
That is interesting. Some rocks appear peg rock a hole are arranged in long axis. Some rocks have been carved groove extract is disconnected. And also the stonecutter broke up and a square bars are common.