Jarosite has been found in the ice cores that were extracted from Antarctica by a team of international researchers recently.

What is jarosite used for?

Jarosite precipitation is used in hydrometallurgy, especially the zinc industry, to control iron, sulfate and other impurities.

Is jarosite on Mars?

Jarosite, a potassium (sodium) iron sulphate hydrated mineral, has recently been identified on the martian surface by the Opportunity rover. ... Its stability makes jarosite potentially useful to retain textural, chemical, and isotopic evidence of past history, including possible biological activity, on Mars.