Mineral Evolution Database
Created and maintained by the Mineral Evolution Project in partnership with RRUFF and mindat.
Mineral locality data provided by mindat.org



Only display mineral occurrences with a max age below:  and a max age above:    
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  • This page displays localities at which this mineral is found, and estimates of the oldest possible geologic age of the mineral at these localities.


    • Minerals queried: Tweddillite

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    Max Age (Ma)Min Age (Ma)mindat IDLocality containing MineralCountryTectonic SettingsDated Locality IDDated Locality (Max Age)Reference (Max Age)Reference (Min Age)Excel ID (Max Age)Excel ID (Min Age)Query Minerals# of Query Minerals at LocalityLat DegLat MinLat SecLon DegLon MinLon SecDecimal Degree
    14553ItalyItalyTweddillite 14232712165742.535277777778,12.2825
    2068Aosta Valley, ItalyItalyTweddillite 14544457174545.745833333333,7.2958333333333
    130792Saint-Marcel, Aosta Valley, ItalyItalyTweddillite 14540457265745.679166666667,7.4491666666667
    MD4543Prabornaz Mine (Praborna Mine), Saint-Marcel, Aosta Valley, ItalyItalyTweddillite 14540457265745.679166666667,7.4491666666667
    P5416614488JapanJapanUSGSOFR2009-1034MJ11_261vms-00512Alexandra-0100Tweddillite 135195713558335.3325,135.9675
    O5416620264Ehime, JapanJapan20264Ehime, JapanUSGSOFR2009-1034MJ11_261vms-00512Alexandra-0100Tweddillite 1334620132564633.772222222222,132.94611111111
    MD134302Kamisugai Mine, Ehime, JapanJapanTweddillite 10000000,0
    MD9910Sanbagawa Metamorphic Belt, JapanJapanTweddillite 10000000,0
    P10541042.214468South AfricaSouth AfricaAM88_189AM88_189Scott-AM88_189-0001Scott-AM88_189-0001Tweddillite 1-28-14-36264719-28.243333333333,26.788611111111
    P10541042.25822Northern Cape, South AfricaSouth AfricaAM88_189AM88_189Scott-AM88_189-0001Scott-AM88_189-0001Tweddillite 1-28-59-5823715-28.999444444444,23.120833333333
    P10541042.214466Kalahari Manganese Field, Northern Cape, South AfricaSouth AfricaAM88_189AM88_189Scott-AM88_189-0001Scott-AM88_189-0001Tweddillite 1-27-12-34225450-27.209444444444,22.913888888889
    P10541042.243342Hotazel, Kalahari Manganese Field, Northern Cape, South AfricaSouth AfricaAM88_189AM88_189Scott-AM88_189-0001Scott-AM88_189-0001Tweddillite 1-27-12-322586-27.200833333333,22.968333333333
    MDY10541042.23071Wessels Mine, Hotazel, Kalahari Manganese Field, Northern Cape, South AfricaSouth Africa3071Wessels Mine, Hotazel, Kalahari Manganese Field, Northern Cape, South AfricaAM88_189AM88_189Scott-AM88_189-0001Scott-AM88_189-0001Tweddillite 1-27-11-5922580-27.199722222222,22.966666666667

    This mineral directly occurs at 4 localities (4 localities according to mindat, 13 localities if parents are counted as well)
    Of the 4 localities at which this mineral occurs, 1 has an age. (7 of the 13 parent localities have ages)


    MDThe mineral occurs at this locality according to MED, but does not have an age yet.
    MDThe mineral occurs at this locality according to MED, and has an age.
    The mineral occurs at some child of this locality.
    The locality at which the mineral occurs does not have an age...this is the closest parent locality with an age, relative to that mineral. This is not ideal.

    AThis mineral is Anthropogenic.
    GThis mineral is directly dated.
    BThis mineral is reported as having this age.
    YThis mineral is using an age reported as an element mineralization period.
    OThis mineral is using an age calculated from all data at the locality.
    RThe age displayed for this mineral originates from a different, non-child locality.
    PThe 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.

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    If a locality has both a GPS coordinate, and either contains or has at least one child locality containing at least one of the minerals listed above, then this map displays a single marker for that locality.

     This bottom-level locality is directly dated. (1 total)
     This locality is directly dated, but is not bottom-level. (1 total)
     This locality is not directly dated, and is not bottom-level. (5 total)

     This bottom-level locality has an age assigned to it from some other locality. (0 total)
     This locality does not have an age assigned to it. (3 bottom-level + 3 top/mid-level = 6 total)

       






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