| 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. |
| Heulandite | Mordenite | None | Not in a structural group |
| Heulandite-Ca (*) | Laumontite (*) | Mordenite (*) |
| 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 |
|---|---|---|---|---|---|---|---|
| Heulandite-Ca (*) | Heulandite | (Ca,Na,K)5(Si27Al9)O72·26H2O | 0 | 246 | |||
| Laumontite (*) | Not in a structural group | CaAl2Si4O12·4H2O | 0 | 1271 | |||
| Mordenite (*) | Mordenite | (Na2,Ca,K2)4(Al8Si40)O96·28H2O | 0 | 405 |
All locality data graciously provided by mindat.org
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