Stonehenge was formed from rock quarried at two Welsh outcrops 5,000 years ago.
These crated the bluestones that first formed Stonehenge and were moved, archaeologists claim, over the Salisbury plains to its current location.
This is contrary to a popular theory stating the enormous rocks, up to 80 of them in total, were transported by sea via the Bristol channel.
The bluestones are thought to have been sliced off Carn Goedog and Craig Rhos-y-felin in the Preseli hills in west Wales which provided easy access to natural, vertical pillars.
Evidence of the quarrying from 3,000 BC was found in the form of charcoal at both sites, which researchers claim was used to create the obelisks.
The new discoveries also cast doubt on a popular theory that the bluestones were transported by sea to Stonehenge.
Professor Kate Welham, of Bournemouth University, said: ‘Some people think that the bluestones were taken southwards to Milford Haven and placed on rafts or slung between boats and then paddled up the Bristol Channel and along the Bristol Avon towards Salisbury Plain.
‘But these quarries are on the north side of the Preseli hills so the megaliths could have simply gone overland all the way to Salisbury Plain.’
The research also claims it is possible a prototype of Stonehenge was originally built at Waun Mawn, situated only 1.86 miles (3km) from the rocky outcrops they were mined form.