This formation was reported today on the 6th of July at Milk Hill, near Alton Barnes, Wiltshire UK !
The Triquetra ~ A "Trinity knot"
The Triquetra is three interlocking pieces that represent the place where three circles would overlap. In Christian Ireland and other areas, the triquetra was used to represent the Holy Trinity, but the symbol itself far predates Christianity. It has been speculated that the triquetra was a Celtic symbol of feminine spirituality, but it has also been found as a symbol of Odin in the Nordic lands. Some Pagan writers claim that the triquetra is the symbol of a triple goddess, but there is no scholarly evidence of a connection between any triune goddess and this particular symbol. In some modern traditions, it represents the connection of mind, body and soul, and in Celtic-based Pagan groups it is symbolic of the three realms of earth, sea and sky.
Although commonly referred to as Celtic, the triquetra also appears on a number of Nordic inscriptions. It has been discovered on 11th-century runestones in Sweden, as well as on Germanic coins. There is a strong similarity between the triquetra and the Norse valknut design, which is a symbol of Odin himself. In Celtic artwork, the triquetra has been found in the Book of Kells and other illuminated manuscripts, and it often appears in metalworking and jewelry.
Occasionally, the Triquetra appears within a circle, or with a circle overlapping the three pieces.
The symbol has been used by Christians as a sign of the Holy Trinity (Father, Son and Holy Spirit), especially since the Celtic Revival of the 19th century. When modern designers began to display the triquetra as a stand-alone design, it recalled the three-leafed shamrock which was similarly offered as a trinity symbol by Saint Patrick. Some have also suggested that the triquetra has a similarity to the Christian Ιχθυς symbol. The triquetra has been used extensively on Christian sculpture, vestments, book arts and stained glass. It has been used on the title page and binding of some editions of the New King James Version.
A very common representation of the symbol is with a circle that goes through the three interconnected loops of the Triquetra. The circle emphasizes the unity of the whole combination of the three elements.