| 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. |
| Biphosphammite | Gypsum | Humboldtine | None | Oxalate | Picromerite | Struvite | Syngenite |
| Biphosphammite (*) | Boussingaultite (*) | Dittmarite (*) | Glushinskite (*) | Gwihabaite (*) |
| Gypsum (*) | Struvite (*) | Syngenite (*) | Weddellite (*) |
| 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 |
|---|---|---|---|---|---|---|---|
| Biphosphammite (*) | Biphosphammite | (NH4)H2(PO4) | 1000 | 0 | 0 | 11 | |
| Boussingaultite (*) | Picromerite | (NH4)2Mg(SO4)2·6H2O | 1000 | 0 | 0 | 30 | |
| Dittmarite (*) | None | (NH4)Mg(PO4)·H2O | 1000 | 0 | 0 | 7 | |
| Glushinskite (*) | Humboldtine Oxalate | Mg(C2O4)·2H2O | 1000 | 0 | 0 | 5 | |
| Gwihabaite (*) | None | (NH4)(NO3) | 1000 | 0 | 0 | 10 | |
| Gypsum (*) | Gypsum | Ca(SO4)·2H2O | 1000 | 0 | 0 | 6890 | |
| Struvite (*) | Struvite | (NH4)Mg(PO4)·6H2O | 1000 | 0 | 0 | 30 | |
| Syngenite (*) | Syngenite | K2Ca(SO4)2·H2O | 1000 | 0 | 0 | 44 | |
| Weddellite (*) | Oxalate | Ca(C2O4)·2H2O | 1000 | 0 | 0 | 32 |
| Age ID | Locality Notes |
|---|---|
| Michelle_823 | A guano and fossil rich cave in the dolomitic hills of Gcwihaba Valley. Fossils indicate heavy sedimentation at the Plio-Pleistocene boundary, with ongoing spleothem mineralization. |
| Michelle_824 | Drotsky's Cave lies in dolomitic marbles of the Upper Proterozoic Otavi Group or Damara Sequence |
| Excel ID | Max Age (Ma) | Min Age (Ma) | Age as listed in reference | Dating Method | Age Interpret | Prioritized? | Sample Source | Sample Num | Run Num | Age from other Locality | Dated Mineral | Minerals explicitely stated as having this age | Age applies to these Elements | MinDat Locality ID | Dated Locality (Max Age) | Location as listed in reference | Reference | Reference DOI | Reference ID | Age Notes | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Michelle_823 | 2.5 | 0 | 2.5-0 | fossil fauna | Age of cave sedimentation | 5807 | Gcwihaba Cave (Drotsky's Caverns), Ngamiland West District, North-West District, Botswana | Drotsky's Caverns | Pickford (1990) | BNR22_1 | At the time of ancient cavern formation, the water table lay about 30 metres higher than the present datum in the floor of the Gcwihabadum. The fauna indicated an age for the sediments of about 2.5 million years. Thus considerable erosion can be postulated to have occurred in the region since the end of the Pliocene. | ||||||||||
| Michelle_824 | 1000 | 541 | Upper Proterozoic | Age of host rock | 5807 | Gcwihaba Cave (Drotsky's Caverns), Ngamiland West District, North-West District, Botswana | Drotsky's Cave | Railsback et al. (1999) | 10.1080/02723646.1999.10642682 | PG20_331 | Drotsky's Cave lies in dolomitic marbles of the Upper Proterozoic Otavi Group or Damara Sequence |
| Sample | Source Locality | Reference URL |
|---|---|---|
All locality data graciously provided by mindat.org
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