Rich in active gases or metals — a strong mineral character.
Buoyancy
Standard buoyancy
LowHigh
Soft water — natural, classic buoyancy.
SoufreSulfuresSulfates
El Pou del Petroli — Catalan for 'The Oil Well' — is a naturally sulphurous spring in the Pyrenean or Catalan borderlands whose name reflects a historical association between sulphurous springs and the oily, viscous quality sometimes imparted to water by hydrocarbon-bearing geological strata. Such springs were often noted by earlier generations as having a petroleum-like smell or sheen, and were sometimes exploited for both medicinal and practical purposes. Today the spring is valued as a curiosity of natural geochemistry and a site of authentic regional heritage.
Insider tip — El Pou del Petroli (the Petroleum Well) is an unusual natural spring near Palamós on the Costa Brava, where sulfurous geothermal water with petroleum-like odors emerges along a coastal geological fault. The site reflects the presence of organic-rich Miocene marine sediments beneath the coastal plain of the Baix Empordà. The spring's pungent character is a remarkable curiosity along an otherwise tourist-oriented Mediterranean coastline. Historically, local fishermen used the warm sulfurous water for soaking after sea work, believing it prevented rheumatism.