cle. It was named by John Aubrey for the "heel shaped dent", which relates to the legend that the Devil threw the stone at the Friar's heel, which dented the stone. Heel Shaped Dent is in quotation marks because experts on Stonehenge have never found such an indention in the stone.The Four station stones lie just inside the embankment, approximately in line with the Aubrey Holes . They were erected during Phase III. Lines connecting the stones opposite each other will intersect at the very center of the monument at an angle of 45 degrees and are symmetrical with respect to the main axis.Small circular ditches enclose two flat areas on the inner edge of the bank, known as the North and South barrows, with empty stone holes at their centers. The Aubrey Holes was named after John Aubrey, circle around the "Y" and "Z" holes. They were first noticed by Aubrey, and thus carry his name. They consist of small, barely visible, manmade cavities filled with rubble.The Y & Z Holes are actually thirty "y" holes and 29 "z" holes circle around Stonehenge. They are concentric circular holes. The Y holes lie 11 meters outside the Sarsen Circle, and the Z holes lie 3.7 meters outside the Sarsen circle.The building of its structure can be divided into four periods spanning approximately 2,000 years:Phase I was begun in approximately 3,100 BC, and it consists of a circle with an approximately 320 foot diameter, consisting of a low outer bank surrounding a ditch with another bank about 6 feet high within this ditch. Inside the inner bank are the Aubrey Holes.Phase II began around 2,100 BC, and it is believed that this phase was conducted by the Beaker culture, who were named so because of the form and style of their pottery. The Avenue was built, an earthwork approach road leading to the entrance of the bank and ditch. It included the addition of 80 bluestones in two rings in the center. These bluestones are believed to have come from the Preseli Mountains ...
