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. |
Aragonite | Calcite | Gypsum | None | Oxalate |
Aragonite (*) | Calcite (*) | Gypsum (*) | Whewellite (*) |
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 |
---|---|---|---|---|---|---|---|
Aragonite (*) | Aragonite | Ca(CO3) | 83.6 | 72.1 | 0 | 3250 | |
Calcite (*) | Calcite | Ca(CO3) | 83.6 | 72.1 | 0 | 27770 | |
Gypsum (*) | Gypsum | Ca(SO4)·2H2O | 83.6 | 72.1 | 0 | 6890 | |
Whewellite (*) | Oxalate | Ca(C2O4)·H2O | 83.6 | 72.1 | 0 | 66 |
Age ID | Locality Notes |
---|---|
Michelle_574 | Whewellite, calcium oxalate monohydrate, has been found as a crystal perched on terminated' unetched, drusy calcite crystals in a septarian limestone concretion in the marine Bearpaw shale of late cretaceous age near Havre, Montana. |
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_574 | 83.6 | 72.1 | Campanian | stratigraphy | Age of Bearpaw Shale | high | Whewellite | 30928 | Havre, Hill Co., Montana, USA | Havre | Pecora and Kerr (1954) | AM39_208 | Age of Bearpaw Shale, containing the limestone concretions in which whewellite has been found. |
Sample | Source Locality | Reference URL |
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