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They also claimed that small pieces of debris found near Stonehenge, which were traced back to the dig site in Wales, were actually transported by the movement of glaciers over half a million years ago, and not brought by ancient masons along with the bluestones.
There is very little theory now regarding the formation of Stonehenge. It is man made. 3000 BCE - a ditch with a bank was dug. 2500 BCE - timber structure built and already decayed. 2500-2000 BCE - stone construction undertaken. The larger sarsen stones (vertical) were transported from north Wiltshire (some tens of miles).