| The most compelling is large quantities of jarosite, a mineral that contains iron, sulfur and trapped water. |
| Leaching residues from zinc processing, dusts and sludges such as jarosite, hematite, goethite, etc. |
| It has yet to be established whether points of methane concentration in the Martian atmosphere coincide with jarosite deposits. |
| Selected maps show jarosite and hematite, common products of the oxidation of iron-sulfide tailings. |
| The orbs measure between 1.5 and 5 inches and are believed to be covered in a yellow material called jarosite and to contain a core of clay. |
| The place in question is near the source of the Rio Tinto, in Spain, and the similarity is the presence of a mineral called jarosite. |
