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Some of the volcanic bluestones in the inner ring of Stonehenge officially match an outcrop in Wales that's 160 miles (257 kilometers) from the world-famous site, geologists announced this week.
The discovery leaves two big ideas standing about how the massive pieces of the monument arrived at Salisbury Plain: entirely by human hand, or partly by glacier.
As it looks today, 5,000-year-old Stonehenge has an outer ring of 20- to 30-ton sandstone blocks and an inner ring and horseshoe of 3- to 5-ton volcanic bluestone blocks.
The monument's larger outer blocks, called the Sarsen stones, were likely quarried some 20 to 30 miles (32 to 48 kilometers) away in what's now England, where sandstone is a common material.
The origin of the bluestones, however, has weighed heavy on the hearts of archaeologists. Rocks resembling the material under a microscope haven't been found anywhere relatively near Stonehenge—at least until now.
Pinpointing the stones' origins is crucial to understanding how so many heavy hunks of rock made their way to the open plain where Stonehenge now stands.
"There's no way of explaining how these stones were transported without knowing where they came from," said study co-author Robert Ixer of the University of Leicester in the U.K.
For about two decades, Ixer and study co-author Richard Bevins, of the National Museum of Wales, have searched for the origins of the bluestones in outcrops around Wales.
As late as two years ago, the pair thought the blocks couldn't have come from the country—no samples from Welsh outcrops matched the Stonehenge blocks.
But not all of the samples collected over 20 years had yet been prepared for examination under a microscope. To be absolutely certain, the geologists began slicing up their remaining rocks.
The very first one—a chunk of rock collected in Wales 20 years ago—was a perfect match to the Stonehenge bluestones. The geologists spent the next two years checking a piece of Stonehenge bluestone against other outcrops around Wales.
"We sampled extensively and did not find anything that came anywhere close," Ixer said.
The rocky outcrop fingered by the duo's analysis is called Craig Rhos-y-Felin, which is now located on private land near a sheep farm.
The site is a long, bush-covered set of crags the size of four double-decker buses.
The new find leaves two prominant theories for how the Welsh rocks got to Salisbury.
Humans could have quarried the site and dragged the blocks on wooden rafts. Or a giant glacier may have chiseled off the blocks and ferried them about a hundred miles (160 kilometers) toward Stonehenge, with humans dragging them the rest of the way.
If humans did the digging, archaeologists might detect marks left by tools or some other evidence. But if signs of human quarrying are lacking, the glacier idea might gain the upper hand.
The 5,000-year-old ceremonial site is thought to have been a key stop along an ancient route between a land of the living, several miles away, and a domain of the dead—Stonehenge. At least one archaeologist thinks Bluestonehenge may have been a sort of crematorium. Named for the color of its long-gone stones, Bluestonehenge, or Bluehenge, was dismantled thousands of years ago, and many of its standing stones were integrated into Stonehenge during a rebuilding of the larger monument, according to the archaeologists
Originally posted by Rafe_
reply to post by freedomSlave
Your welcome
I agree they should do something like that with more people on a bigger scale.It would be good and about time to get more attention for it.Then they can finally stop claiming how this is all such a mystery and how we have no clue full stop and actually get somewhere.
Originally posted by Rafe_
reply to post by Hanslune
Since the established parties are not interested in the evidence presented i doubt there is much chance of such a initiative.
Originally posted by Rafe_
reply to post by Hanslune
Uhm....Have you seen what i posted here?
Originally posted by Hanslune
Why yes, good old Wally. However he hasn't moved 50 ton blocks over 100 kilometers of uneven terrain, across water, etc. You will also note that he uses solid concrete bases to base his movements and balancing on, something the ancient wouldn't have had. His studies are an excellent start but not the completion of reclaiming the tradition
Originally posted by Hanslune
reply to post by isyeye
Yes the Russian used copper balls to do the same thing to move the thunder stone - the heaviest weight moved without power - the problem is that you need a very firm foundation to base the rocks or balls on, in sand or soil it's a no go
Originally posted by stumason
Various forms of concrete were used by the Babylonians, Egyptians, Greeks and Romans. In fact, it seems to have been widely used by many ancient cultures in some form or another. It isn't too far fetched to imagine ancient Britons would have access to similiar materials, seeing as they were actively trading with the continent during this time anyway.
At any rate, I think it is a bit wrong of people to assume that ancient peoples were incapable of doing things like this. They clearly were and just a cursory glance at ancient building techniques shows they were resourceful and capable engineers and builders.