Because cosmic radiation bee attenuated with range by the rock, analysts are only interested in obtaining the top couple of centimetres of a rock’s area. Stone trials perhaps compiled with a hammer and chisel or with a rock saw. This can get a long time!

Because cosmic radiation bee attenuated with range by the rock, analysts are only interested in obtaining the top couple of centimetres of a rock’s area. Stone trials perhaps compiled with a hammer and chisel or with a rock saw. This

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