The new discovery at Durrington Walls henge can be found on most media web sites from The Guardian to the Independent. It is also at http://phys.org/print360835645.html …
Here we learn the stones were buried beneath a bank – constructed over them. They also call the C shaped arrangement an arena – a sort of open air theatre. If so this would be an ideal place to perform a pageant, or myth-play (a re-enactment of a past event). Basically, this is what in the modern world we might call a nativity play – or mummers play. Even a spot of morris dancing.
Durrington Walls is called a super henge because its banks and ditches were high and deeper than other examples. The reason for this is unknown. The buried stones were discovered by the 'Stonehenge Hidden Landscape Project' in collaboration with Birmingham University and the Vienna based 'Ludwig Botzman Institute for Archaeological Prospection and VirtualArchaeology' (LBI Arch Pro).
Durrington Walls is 500m in diameter and 1.5 km in circumference. One interesting add on is that Wolfgang Neubauer said there may originally have been 200 stones and the missing stones may have been transferred to nearby Stonehenge – to build the last setting there (the iconic one we are all familiar with). Thee is a single standing stone (the Cuckoo Stone) in an adjacent field, and appears to connect Durrington Walls with the Cursus monument (north of Stonehenge) – an alignment of sorts.
The new discovery, and the possibility the 90 stones were buried because the rest of the stones were required to be re-sited over the hill, so to speak, means that all the textbooks on Stonehenge will now have to be re-written. Good job for somebody – and a nice little earner.