High‑definition imaging of a 17,000‑year‑old cave in Wales proves that early humans painted deliberate lines with hematite pigment.
From Iron Oxide to Art
The red markings in Bacon Hole cave were first noted in 1912 by William Sollas and Henri Breuil, who catalogued about ten lines of pigment. For decades, scholars dismissed them as natural iron‑oxide deposits. Recent expeditions (2022‑2024) re‑examined the marks with high‑definition photography, color‑filter algorithms, and spectroscopic analysis.
Spectroscopy revealed that the pigment is hematite, a form of iron oxide distinct from the surrounding natural deposits. The lines are evenly spaced, a pattern unlikely to arise from geological processes. These findings were published in the journal Quaternary.
Techniques That Unmask the Past
Researchers compared samples from the cave’s lines with nearby rocks and natural iron‑oxide deposits. By applying color‑filter algorithms to high‑resolution images, they isolated the pigment’s spectral signature. Spectroscopy confirmed the presence of hematite, ruling out natural staining.
The marks’ regular spacing suggests intentional design, not random mineral staining. The study authors note that the horizontal lines “represent anthropogenic activity.”
Implications for Upper Paleolithic Britain
If the marks date to at least 17,000 years ago, they become the earliest confirmed cave art in the British Isles, predating the previously accepted 50,000‑year‑old Upper Paleolithic examples. This pushes back the timeline for artistic expression in the region.
Further dating is needed to refine the age, but even a margin of a few centuries would vindicate Sollas and Breuil’s early hypothesis. The discovery underscores the value of re‑examining old sites with modern technology.
Future work will focus on radiocarbon dating of the pigment and contextual analysis of the cave’s occupation layers. These steps will solidify the marks’ place in the narrative of human creativity during the Upper Paleolithic.
Source: Oldest cave art in the U.K. discovered inside Wales cave
Domain: scientificamerican.com
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