England, Wiltshire 
Oliver's Castle 2008 and 2009
..
1) AUGUST 2008: crop circle
2) JANUAR 2009: ghost circle in snow 
3) AUGUST 2009: ghost circle in the new crop
8th of January 2009: 
ghost circle in snow on the plowed field
 The 8th of January Mattew Willliams was flying after several days of temperatures below 
  zero. The landscapes of Wiltshire were covered by a thin layer of snow. Flying over 
   Oliver's Castle,
 he noticed something unusual: 
On the exact spot where a beautiful crop formation was discovered the 16th of August 2008, the snow 
was missing. And not only that, within the formation area, only the  sections  former crop circle where 
the plantswere flattened, were without snow! The sections  in the former crop formation where there 
had been standing crop, had snow cover. 

Photo: Mattew Williams
  
  
  Photo: Russell Stannard
  

Photo: K.A.
Not far away, in the neighbouring field, there is a barrow (see the dark area in the field in the 
  forground in teh photo below). This barrow was also without snow. 
  One can imagine that the snow falling on a barrow could be blown away by the wind, but that the 
  wind could blow away snow from a flat field only in the sections of flattened plants in a former 
  
  crop circle, is rather unlikely. 
 

Photo: Mattew Williams
Traces in the fields of crop circles from earlier years are often referred to as "ghost formations".
  Ghost formations in snow have been reported earlier, both in England and in The Netherlands. 
  
In an article at the web site Swirled News, Bert Janssen and Janet Ossebaard suggest that ghost 
formations in snow
might be due to changes in the soil caused by the former crop circle at the same 
spot, changes such as crystallization  in the soil. 
 
Increased crystallization  in the clay particles in the soil has been found in crop circles in several 
cases. You can find a study about crystallization at the web site of  BLT Reasearch Team. 
    8th of August  2009: 
 
  ghost circle in the new crop    
On the  8th of August 2009, Stannard Russell flew over Oliver's Castle. To his surprise, he saw that, 
  again, the crop circle from August 2008 was visible in the same field: 

  Photo: Russell Stannard
  
  Photo: Russell Stannard
  
    In this field there was again  wheat crop, and   at the site of the august 2008 formation, the 
  wheat plants  now looked darker than the plants in the rest of the field.
The areas with darker plants exactly matched the sections with downed crop in the formation
  from the previous year: 
  
  

  Photos: K.A. og Russell Stannard
  
    Some days after Stannard had photographed this new ghost formation from the air, he visited
    the area on the ground to try to ascertain what might be the cause of the ghost effect. 
Unfortunately the electrical fence surrounding the field
  made it impossible to enter. From the 
  edge of the field 
  he could not make out what might be the cause of the ghost effect. However, 
  
  Stannard suggests that the effect was either the result of the plants being longer or darker in 
  the sections of the field where there had been downed wheat in the former crop circle. 
In 2000 a similar effect was observed near Barbury Castle. In this case it was ascertained that 
  the effect was due to the plants growing longer in the sections of the field that corresponded with 
  the sections 
  of downed plants in the former crop circle. 
Read about the 2000 Barbury Castle ghost formation here.
  
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