1967 Duhamel UFO landing marks

Case dossier

What happened: The first roughly thirty-foot ring was discovered on 5 August, with three additional marks identified nearby. The official inspector measured rings from about 31 feet 9 inches to an ellipse roughly 34 feet 5 inches by 36 feet 3 inches, with flattened or discoloured bands several inches wide.

Witness accounts and timeline: Schielke was a discoverer of the marks, not an eyewitness to a landing. The inspection team reached the site on 11 August with military and local participants, documented conditions and collected samples. This distinction prevents the ground traces from being presented as a witnessed UFO event.

Evidence analysis: The report found crushed or discoloured grass but no exhaust pattern, scorching, broad disturbance outside the rings or abnormal background radiation. It considered rolling or mechanical contact and the possibility of a hoax, while noting that deliberate construction could require effort and equipment.

Official background: Library and Archives Canada preserves the report within Canada's historical UFO records. Memorandum 49/67 is valuable because it records measurements and negative findings rather than relying on newspaper retellings.

Possible explanations and careful assessment: Mechanical creation, agricultural activity, human fabrication and less obvious natural processes remain possible. Because no craft was observed and the physical findings were non-diagnostic, the archive classifies the cause as insufficient data rather than an unresolved vehicle sighting.

Why this case belongs in the archive: Duhamel is a strong example of an official physical-trace investigation that did not produce an extraordinary conclusion. It helps readers distinguish a documented unexplained mark from evidence that a UFO landed.