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. |
Clay | None | Sepiolite | Smectite-vermiculite |
Montmorillonite (*) | Saponite (*) | Sepiolite (*) | Stevensite (*) |
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 |
---|---|---|---|---|---|---|---|
Montmorillonite (*) | Clay Smectite-vermiculite | (Na,Ca)0.3(Al,Mg)2Si4O10(OH)2·nH2O | 3 | 239443,239445,239446 | 1508 | ||
Saponite (*) | Clay Smectite-vermiculite | (Ca,Na)0.3(Mg,Fe)3(Si,Al)4O10(OH)2·4H2O | 2 | 239443,239446 | 301 | ||
Sepiolite (*) | Sepiolite Clay | Mg4Si6O15(OH)2·6H2O | 1 | 239443 | 241 | ||
Stevensite (*) | Clay | (Ca,Na)xMg3-ySi4O10(OH)2 | 0 | 57 |
Sample | Source Locality | Reference URL |
---|---|---|
All locality data graciously provided by mindat.org
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