Soft Circles in the landscape on Seltjarnarnes give information on the people living in Iceland before the viking time

as big as over 20 meter in diameter (estimated some...) we found about 6 circles and my feeling is they might have been 9 all togeather (but because of modern structure on the high hill and a feeling that possibly around three missing...like 9 worlds, an estimate) They are the little reminences of huge turfhouses domes or Borgir from the time before the arraval of the vikings and their plundering the most ancient of the cultures, the culture of Loki, the original keeper of the fire...(Maggi on the picture on Seltjarnarnes in Reykjavík yesterday)
And bye the way... I dont believe this is from the war until if i would see a lot of photos from the war proofing this rumour... or should they have had 8 or 9 gun nests there,. how come its not with any fundament in the middle and just earth in a perfect parabola and nobody has any photos of it then?)