Potassic Evaporite Rock
Image: <a href="//commons.wikimedia.org/wiki/User:LBM1948" title="User:LBM1948">LBM1948</a> (CC BY-SA 4.0)
Mineral NamePotassic Evaporite Rock
Chemical FormulaKCl (dominant mineral Sylvite)
Mohs Hardness2
Crystal Systemcubic
Lustervitreous
Streak Colorwhite
Cleavageperfect cubic {001}
Fractureuneven to conchoidal
Specific Gravity1.99
Colorsreddish-brown, white, gray
Transparencytransparent to translucent
Type LocalityMuntanya de Sal, Cardona, Barcelona, Catalonia, Spain
Mineral GroupHalides (dominant mineral Sylvite)
Usespotash fertilizer, chemical industry, food additive
Associated Mineralshalite, carnallite, gypsum, anhydrite, clay minerals
Raritycommon
Description
The image shows a layered rock face composed of potassic salts, with prominent reddish-brown and darker gray bands, exhibiting a crystalline texture.
Geological Context
This evaporite rock formed from the precipitation of salts due to the evaporation of ancient seawater or saline lakes, often found in thick sedimentary sequences or diapiric structures like the Cardona salt mountain.
