Case file · Anomaly hotspot
Marysburgh Vortex
Eastern Lake Ontario's 'graveyard of the Great Lakes' — many wrecks, compass anomalies and light reports.
1950 CE · 43.90, -76.90 · status: folklore
The researched reading
A genuine ships’ graveyard explained by geography, weather and traffic. The vortex is a 1980 label on an old, ordinary danger.
| Explanation | Weight | Why |
|---|---|---|
| A known natural phenomenon | 55% | Eastern Lake Ontario funnels traffic to the St Lawrence through shoals, islands and fog, under fierce autumn gales; the many wrecks are what busy sailing routes plus weather produce. Local iron-bearing rock gives real compass deviations. |
| Something known, misidentified | 14% | Lights over the lake fit ships, aircraft and reflections; ordinary wrecks are reframed as mysteries. |
| A hoax or fabrication | 12% | The “vortex” comes from Hugh Cochrane’s 1980 book Gateway to Oblivion, which mixed real wrecks with speculation. |
| Perception, memory or mind | 10% | Grouping of losses in a named zone. |
| A poorly understood natural phenomenon | 5% | Local magnetic anomalies are real but understood; they mislead compasses, not ships’ fates. |
| Secret human technology | 2% | No link to secret activity. |
| Genuinely anomalous | 2% | No documented case requires it. |
Official position: No official investigation of a zone; marine historians treat the wrecks as ordinary losses.