| 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. |
| Ardennite | Corundum | Epidote | None |
| Hematite (*) | Kannanite (*) | Piemontite (*) |
| 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 |
|---|---|---|---|---|---|---|---|
| Hematite (*) | Corundum | Fe2O3 | 0 | 14640 | |||
| Kannanite (*) | Ardennite | Ca4Al4(MgAl)(VO4)(SiO4)2(Si3O10)(OH)6 | 0 | 1 | |||
| Piemontite (*) | Epidote | Ca2(Al2Mn3+)[Si2O7][SiO4]O(OH) | 0 | 260 |
All locality data graciously provided by mindat.org
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