This unusual circle has been quite widely reported, but due to its odd
nature, has been described in a variety of ways. Circular Evidence for
example calls it a circular trough of bare soil, and "the wheat inside
was flattened with a clockwise swirl". Dimensions also vary widely from report to report.
The
best way to understand the anatomy of this circle is via the photograph
opposite. What we have is a central area which has been flattened with
no obvious swirl evident. Around this is a broad ring of bare soil, and
around that, a narrow band of anti-clockwise swirled stems.
The circle was found by farmer Rob Habner, on or around Christmas Day, 1971. Due to the fact that the land had not been farmed since December 8th (and the observation that a few fallen seeds had germinated) it was probably a couple of weeks old by that point.
The police were called to look at the circle but apparently there was no follow-up on the case. It was, however, reported in the newspaper Australian Post and several others (see below).
Keith Basterfield's investigation team also visited the site and recorded their observations. The soil in the field was said to be hard, and there were no tracks evident where somebody might have entered the formation.
Their diagram is reproduced below.
Media interest
Australian newspapers showed an interest in the case. Near right is a report in The Australian (May 4, 1972) detailing a pending site visit by UFO investigators. Far right is a report from the (Adelaide) Sunday Mail (April 22, 1972) which oddly refers to "Markings" (plural), implying more than one circle was known.