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



The Mineral Evolution database is currently under development.

The goal of this page is to present localities at which the mineral is found, and estimates of the oldest possible geologic age of the minerals at these localities.


Locality Name:
Margaret Mine (Germania Mine; Earl Mine; Samson Mine; Goat Mountain Mine), Goat Mtn, Mt St Helens District, Skamania Co., Washington, USA

Oldest recorded age at locality: 22
Youngest recorded age at locality: 16

mindat Locality ID: 25904
mindat URL: http://www.mindat.org/loc-25904.html

Tectonic Settings:

Total number of sublocalities beneath "Margaret Mine (Germania Mine; Earl Mine; Samson Mine; Goat Mountain Mine), Goat Mtn, Mt St Helens District, Skamania Co., Washington, USA": 0
Total number of bottom-level sublocalities: 0

Latitude: 46°21'21"N
Longitude: 122°4'50"W
Decimal Degree (lat, lon): 46.355833333333,-122.08055555556
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.

This Mineral list contains entries from this locality, including sub-localities. Minerals in bold are reported by mindat.org as occurring directly at this locality, and do not occur at any children (sublocalities) of this locality.

Elements at this locality, including sub-localities: Al As C Ca Cu Fe H K Mo O Pb S Si Zn 

Elements from minerals reported directly at this locality: Al As C Ca Cu Fe H K Mo O Pb S Si Zn 

Structural Groups for minerals in this locality: 
AllophaneArsenopyriteCalciteChalcopyriteClayClinozoisiteCopperCorundumCovelliteDiaspore
EpidoteKaoliniteMalachiteMicaMolybdeniteNoneNot in a structural groupPyriteQuartzRocksalt
SphaleriteSpinel

21 IMA Minerals at location:
Arsenopyrite  (*)Azurite  (*)Bornite  (*)Calcite  (*)Chalcocite  (*)
Chalcopyrite  (*)Chrysocolla  (*)Copper  (*)Covellite  (*)Epidote  (*)
Galena  (*)Goethite  (*)Hematite  (*)Kaolinite  (*)Magnetite  (*)
Malachite  (*)Molybdenite  (*)Muscovite  (*)Pyrite  (*)Quartz  (*)
Sphalerite  (*)
Mineral nameStructural GroupsIMA FormulaMax Age (Ma)Min Age (Ma)# of Sublocalities containing mineralLOCALITY IDs, not mindat ids# of localities containing mineral
Arsenopyrite  (*)ArsenopyriteFeAsS171609052
Azurite  (*)Not in a structural groupCu3(CO3)2(OH)2171605509
Bornite  (*)NoneCu5FeS4171605516
Calcite  (*)CalciteCa(CO3)2216027770
Chalcocite  (*)NoneCu2S171605707
Chalcopyrite  (*)ChalcopyriteCuFeS21716027198
Chrysocolla  (*)Allophane(Cu2-xAlx)H2-xSi2O5(OH)4·nH2O171603531
Copper  (*)CopperCu171603846
Covellite  (*)CovelliteCuS171604165
Epidote  (*)Epidote ClinozoisiteCa2(Al2Fe3+)[Si2O7][SiO4]O(OH)171608173
Galena  (*)RocksaltPbS1716024243
Goethite  (*)DiasporeFeO(OH)221607437
Hematite  (*)CorundumFe2O32216014640
Kaolinite  (*)Clay KaoliniteAl2Si2O5(OH)4171605591
Magnetite  (*)SpinelFe2+Fe3+2O41716014899
Malachite  (*)MalachiteCu2(CO3)(OH)21716012537
Molybdenite  (*)MolybdeniteMoS2171605800
Muscovite  (*)Mica ClayKAl2(Si3Al)O10(OH)22216017380
Pyrite  (*)PyriteFeS21716039462
Quartz  (*)QuartzSiO22216061156
Sphalerite  (*)SphaleriteZnS1716021482


7 Ages assigned to this locality:

Excel IDMax Age (Ma)Min Age (Ma)Age as listed in referenceDating MethodAge InterpretPrioritized?Sample SourceSample NumRun NumAge from other LocalityDated MineralMinerals explicitely stated as having this ageAge applies to these ElementsMinDat Locality IDDated Locality (Max Age)Location as listed in referenceReferenceReference DOIReference IDAge Notes
NAVDAT-10982222121+1/-0   10982    25904Margaret Mine (Germania Mine; Earl Mine; Samson Mine; Goat Mountain Mine), Goat Mtn, Mt St Helens District, Skamania Co., Washington, USA NAVDAT NAVDAT 
NAVDAT-10983222121+1/-0   10983    25904Margaret Mine (Germania Mine; Earl Mine; Samson Mine; Goat Mountain Mine), Goat Mtn, Mt St Helens District, Skamania Co., Washington, USA NAVDAT NAVDAT 
NAVDAT-10984222121+1/-0   10984    25904Margaret Mine (Germania Mine; Earl Mine; Samson Mine; Goat Mountain Mine), Goat Mtn, Mt St Helens District, Skamania Co., Washington, USA NAVDAT NAVDAT 
NAVDAT-10985222121+1/-0   10985    25904Margaret Mine (Germania Mine; Earl Mine; Samson Mine; Goat Mountain Mine), Goat Mtn, Mt St Helens District, Skamania Co., Washington, USA NAVDAT NAVDAT 
NAVDAT-1461017.816.817.3±0.5  whole rock14610    25904Margaret Mine (Germania Mine; Earl Mine; Samson Mine; Goat Mountain Mine), Goat Mtn, Mt St Helens District, Skamania Co., Washington, USA NAVDAT NAVDAT 
NAVDAT-1461117.416.416.9±0.5  whole rock14611    25904Margaret Mine (Germania Mine; Earl Mine; Samson Mine; Goat Mountain Mine), Goat Mtn, Mt St Helens District, Skamania Co., Washington, USA NAVDAT NAVDAT 
PorphCu-00074171617–16      Arsenopyrite, Bornite, Chalcopyrite, Chrysocolla, Copper, Covellite, Epidote, Galena, Kaolinite, Magnetite, Molybdenite, Pyrite, SphaleriteCu25904Margaret Mine (Germania Mine; Earl Mine; Samson Mine; Goat Mountain Mine), Goat Mtn, Mt St Helens District, Skamania Co., Washington, USAMargaretSinger et al. (2008) USGSOFR2008_1155 

SampleSource LocalityReference URL

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