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:
Middle Fork Of The Snoqualmie River, Snoqualmie & Burns Districts, King Co., Washington, USA

Oldest recorded age at locality: 25
Youngest recorded age at locality: 25

mindat Locality ID: 293271
mindat URL: http://www.mindat.org/loc-293271.html

Tectonic Settings:

Total number of sublocalities beneath "Middle Fork Of The Snoqualmie River, Snoqualmie & Burns Districts, King Co., Washington, USA": 2
Total number of bottom-level sublocalities: 1

Number of Child Localities: 1
Child Localities:
Snoqualmie Pass

Latitude: 47°29'48"N
Longitude: 121°21'34"W
Decimal Degree (lat, lon): 47.496666666667,-121.35944444444

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.

Arsenopyrite	Baryte	Calcite	Chalcopyrite	Clay	Clinozoisite	Copper	Covellite	Epidote	Malachite
Mica	Molybdenite	Nickeline	None	Not in a structural group	Prehnite	Pyrite	Quartz	Rocksalt	Sphalerite

Ankerite ()*	Arsenopyrite ()*	Azurite ()*	Baryte ()*	Chalcocite ()*
Chalcopyrite ()*	Cosalite ()*	Covellite ()*	Epidote ()*	Galena ()*
Gold ()*	Malachite ()*	Molybdenite ()*	Muscovite ()*	Prehnite ()*
Pyrite ()*	Pyrrhotite ()*	Quartz ()*	Siderite ()*	Sphalerite ()*

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 Au Ba Bi C Ca Cu Fe H K Mo O Pb S Si Zn

Elements from minerals reported directly at this locality:

Structural Groups for minerals in this locality:
Arsenopyrite Baryte Calcite Chalcopyrite Clay Clinozoisite Copper Covellite Epidote Malachite
Mica Molybdenite Nickeline None Not in a structural group Prehnite Pyrite Quartz Rocksalt Sphalerite

20 IMA Minerals at location:

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
Ankerite ()*	None	Ca(Fe²⁺,Mg)(CO₃)₂	25	25	1	284560	3092
Arsenopyrite ()*	Arsenopyrite	FeAsS	25	25	1	284560	9052
Azurite ()*	Not in a structural group	Cu₃(CO₃)₂(OH)₂	25	25	1	284560	5509
Baryte ()*	Baryte	Ba(SO₄)	25	25	1	284560	11547
Chalcocite ()*	None	Cu₂S	25	25	1	284560	5707
Chalcopyrite ()*	Chalcopyrite	CuFeS₂	25	25	1	284560	27198
Cosalite ()*	None	Pb₂Bi₂S₅	25	25	1	284560	344
Covellite ()*	Covellite	CuS	25	25	1	284560	4165
Epidote ()*	Epidote Clinozoisite	Ca₂(Al₂Fe³⁺)[Si₂O₇][SiO₄]O(OH)	25	25	1	284560	8173
Galena ()*	Rocksalt	PbS	25	25	1	284560	24243
Gold ()*	Copper	Au	25	25	1	284560	30554
Malachite ()*	Malachite	Cu₂(CO₃)(OH)₂	25	25	1	284560	12537
Molybdenite ()*	Molybdenite	MoS₂	25	25	1	284560	5800
Muscovite ()*	Mica Clay	KAl₂(Si₃Al)O₁₀(OH)₂	25	25	1	284560	17380
Prehnite ()*	Prehnite	Ca₂Al(Si₃Al)O₁₀(OH)₂	25	25	1	284560	1898
Pyrite ()*	Pyrite	FeS₂	25	25	1	284560	39462
Pyrrhotite ()*	Nickeline	Fe₇S₈	25	25	1	284560	9056
Quartz ()*	Quartz	SiO₂	25	25	1	284560	61156
Siderite ()*	Calcite	Fe(CO₃)	25	25	1	284560	6417
Sphalerite ()*	Sphalerite	ZnS	25	25	1	284560	21482

1 Ages assigned to this locality:

	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
	PorphCu-00062	25	25	25									Ankerite, Arsenopyrite, Chalcocite, Chalcopyrite, Cosalite, Covellite, Epidote, Galena, Gold, Molybdenite, Prehnite, Pyrite, Pyrrhotite, Siderite, Sphalerite	Cu	21957	Condor-Hemlock Mine (Condor Mine; Hemlock Mine; Pegasus Claim; Green Crystal Claim), Snoqualmie Pass, Middle Fork Of The Snoqualmie River, Snoqualmie & Burns Districts, King Co., Washington, USA	Middle Fork	Singer et al. (2008)		USGSOFR2008_1155

Sample	Source Locality	Reference URL

All locality data graciously provided by mindat.org

All age data...