A team of archeologist recently unveiled another mystery associated with Stonehenge. Now the researchers claim the stones used to create Stonehenge may have been first erected in Wales.

The stones after being carried to Salisbury Plain formed part of the monument's inner horseshoe, said archaeologists. It has been known that since 1920s the bluestones were brought to Stonehenge from somewhere in the Preseli Hills.

It was until recent that there has been collaboration with archaeologists to locate and excavate the real quarries from which they actually came.

According to study authors, both of the quarries in Preseli were exploited in the Neolithic, and Craig Rhos-y-felin was also quarried in the Bronze Age, around 4,000 years ago.

Project director Professor Mike Parker Pearson, from UCL Institute of Archaeology, said, “We have dates of around 3,400BC for Craig Rhos-y-felin and 3,200BC for Carn Goedog, which is intriguing because the bluestones didn't get put up at Stonehenge until around 2,900BC”.

He said these Neolithic stone-draggers might have taken around 500 years to transport these quarries to the Stonehenge.

There are higher possibilities that the stones were first used in a local monument, somewhere near the quarries. These stones were then dismantled and dragged off to Wiltshire.

The team behind the discovery includes team of scientists from UCL, the universities of Manchester, Bournemouth and Southampton, Amgueddfa Cymru - National Museum Wales, and Dyfed Archaeological Trust.

The Stonehenge bluestones are made up of volcanic and igneous rocks, the most common of which are called dolerite and rhyolite.