| 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. |
| Amphibole | Descloizite | Fluorite | None | Not in a structural group | Pyroxene | Rocksalt | Rutile | Scheelite | Tourmaline |
| Cassiterite (*) | Cummingtonite (*) | Descloizite (*) | Fluorite (*) | Galena (*) |
| Hemimorphite (*) | Schorl (*) | Spodumene (*) | Wulfenite (*) |
| 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 |
|---|---|---|---|---|---|---|---|
| Cassiterite (*) | Rutile | SnO2 | 1 | 264677 | 5171 | ||
| Cummingtonite (*) | Amphibole | Mg2Mg5Si8O22(OH)2 | 0 | 327 | |||
| Descloizite (*) | Descloizite | PbZn(VO4)(OH) | 0 | 378 | |||
| Fluorite (*) | Fluorite | CaF2 | 0 | 9617 | |||
| Galena (*) | Rocksalt | PbS | 0 | 24243 | |||
| Hemimorphite (*) | Not in a structural group | Zn4(Si2O7)(OH)2·H2O | 0 | 1689 | |||
| Schorl (*) | Tourmaline | NaFe2+3Al6(Si6O18)(BO3)3(OH)3(OH) | 0 | 2705 | |||
| Spodumene (*) | Pyroxene | LiAlSi2O6 | 1 | 264677 | 688 | ||
| Wulfenite (*) | Scheelite | PbMoO4 | 0 | 1655 |
| Sample | Source Locality | Reference URL |
|---|---|---|
| R050359 | Black Hills, South Dakota, USA | https://rruff.info/R050359 |
| R040169 | Black Hills, South Dakota, USA | https://rruff.info/R040169 |
| R060039 | Black Hills, South Dakota, USA | https://rruff.info/R060039 |
All locality data graciously provided by mindat.org
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