| A | This mineral is Anthropogenic. |
| G | This mineral is directly dated. |
| B | This mineral is reported as having this age. |
| Y | This mineral is using an age reported as an element mineralization period. |
| O | This mineral is using an age calculated from all data at the locality. |
| R | The age displayed for this mineral originates from a different, non-child locality. |
| P | The age displayed for this mineral is the range of ages for this mineral at all of this locality's children. |
| This mineral's age has not yet been recorded. |
| Alum | Alunite | Baryte | Clay | Epsomite | None | Palygorskite |
| Ammoniojarosite (*) | Celestine (*) | Epsomite (*) | Jarosite (*) | Palygorskite (*) |
| Tschermigite (*) |
| Mineral name | Structural Groups | IMA Formula | Max Age (Ma) | Min Age (Ma) | # of Sublocalities containing mineral | LOCALITY IDs, not mindat ids | # of localities containing mineral |
|---|---|---|---|---|---|---|---|
| Ammoniojarosite (*) | Alunite | (NH4)Fe3+3(SO4)2(OH)6 | 0 | 30 | |||
| Celestine (*) | Baryte | Sr(SO4) | 0 | 1252 | |||
| Epsomite (*) | Epsomite | Mg(SO4)·7H2O | 0 | 484 | |||
| Jarosite (*) | Alunite | KFe3+3(SO4)2(OH)6 | 0 | 2228 | |||
| Palygorskite (*) | Palygorskite Clay | (Mg,Al)2Si4O10(OH)·4H2O | 0 | 306 | |||
| Tschermigite (*) | Alum | (NH4)Al(SO4)2·12H2O | 0 | 81 |
All locality data graciously provided by mindat.org
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