A Standing Stone and its Possible Astronomical Alignment - Using   Seasonal Shadow and Light Displays in the Neolithic
  Sundials and gnomons pointing out dates and times are a beautiful reminder of how we understand the movement of the Sun and use it to structure day and year. They also encapsulate the basic astronomical knowledge and concepts of the individuals and therefore their societies which have built them. At the heart of every sundial lies the recognition that the daily and seasonal change of light and shadow is repeated over and over again, in the past, present and into the distant future. Such knowledge was developed well before any written documents existed during times when observing did not mean measuring but rather watching and embracing the findings into a far deeper ritualistic religious frame work. A 4,000 year old monolith located at Gardom's Edge with its striking orientation and in the midst of a landscape rich in other monuments is presented as a possible example of such astronomical knowledge and how it might have been applied to create a deeper meaning for this monument. 
D. Brown
physics.hist-ph