These types of tunnels are those of the old mining train route, since, due to the difficult orography, they had to be excavated to avoid the slopes of the mountain.

Translated by Google •

Peaknik

September 7, 2023

The old mines of Meazuri exploited iron carbonate, which was very abundant in the area. The mineral was very abundant, but its metallic grade was very low, so it was later treated in calcination furnaces to transform it into iron oxide. This procedure considerably enriched the ore, eliminating impurities and increasing its metallic grade between 10 and 20%.

Today the route of the old mining train and the tunnels that were excavated to avoid the slopes of the mountain are still preserved.

Translated by Google •

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Elevation 350 m

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Location: Irun, Bajo Bidasoa, Gipuzkoa, Basque Country, Spain

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Tunnels of the Old Meazuri Mines

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