Geoparque Unesco

Industrial Archaeology

Saltworks in Salinas de Trillo

Remains of some old saltworks
Municipality: La Fueva

Taking a path nearby Salinas de Trillo, we can directly access the bottom of the Salinar Gorge. The path leads us to the salt mine, stretching approximately 1Km in length and with a drop in the terrain of approximately 500m. In this gorge, we find the remains of abandoned saltworks.

Old saltworks for salt extraction in Salinas de Trillo. Image by J.M. Mata-Perelló (2008)..

Geological Context

This geological outcrop is formed by clay-gypsum levels interspersed with salt from the Keuper strata (Triassic)..

Subterranean water flowed through these levels creating salt water springs. Important levels of halite do not come to the surface. These materials appear inside the tectonic structure known as the Mediano Anticline.

Geological Significance

This point of Geological Interest has been chosen because of its outcrops from the Keuper strata and the saltworks built to profit from the salt extraction, though this effort was fairly unsuccessful.

Although the saltworks are not preserved in perfect condition, they are of educational interest, and they constitute an element of our mining heritage. Salt water springs also belong to our heritage. In addition we can observe some minerals associated with the rocks from the Keuper strata, such as halite, calcite, anhydrite and gypsum.

Gypsum mineral in the rocks from the Keuper strata (Triassic).

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