Dragon's Eye
This photograph captures an incredible geological anomaly found inside an old, abandoned slate mine in Lancashire, England (often referred to by urban explorers and geologists as the "Dragon's Eye Stone Quarry").
The image shows two explorers standing on a floor of collapsed shale and slate tiles, looking up at a massive, perfectly spherical, and smooth rock formation embedded into the ceiling.
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While it looks like a sculpted piece of fantasy art or a massive fossilized egg, the "Dragon's Eye" is a purely natural phenomenon known to geologists as a spherical exfoliation or a massive concretion/nodule cavity.
Pressure Release: When slate and shale are mined or eroded, the immense weight of the surrounding rock is suddenly lifted. In certain unique geological conditions, the rock relieves this stress by peeling away in concentric, curved layers—much like the layers of an onion.
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The "Iris" and "Pupil" Illusion: The striking color variation inside the eye is caused by mineral staining. Water seeping through the rock layers has deposited iron oxide (rust) and clay minerals across the curved surface, creating the mottled golden-orange patterns that perfectly mimic a detailed iris surrounding a dark, shadowy center.
earthling