Ordovician Tunnel of El Fabar, Geological formation at Ribadesella, Spain.
The El Fabar tunnel contains dark fossiliferous clays and sedimentary rocks that expose extensive sections of the Sueve Formation from the Ordovician period.
Construction of the A8 Freeway in 1998 revealed this geological formation, leading to the discovery of fifty macrofossil species previously unknown in Spain.
The Museo del Territorio de Ribadesella exhibits numerous specimens collected from El Fabar, contributing to local geological education and research initiatives.
Visitors can access the tunnel through designated pathways while informational panels explain the geological features and fossil discoveries throughout the site.
The tunnel sediments contain evidence of Paleozoic oil generation, marking one of the earliest documented instances of petroleum formation in southeastern Europe.
GPS coordinates: 43.46579,-5.14822
Latest update: March 21, 2025 15:31
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