The Winter Solstice Display
This display notes the winter solstice. The circle is split by light and shadow. The shadow maker is the same standing boulder that denoted the summer solstice sunset. Mr. Earl Wilson was first to suggest the circle may have a function by placement. He was right.
This is the second bisected circle used to note specific solar events. The shadow maker is some distance away and uses the same large boulder that makes the shadow for the Summer Solstice Marker. This is probably not a coinsidence.