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:
Skagit Co., Washington, USA

Oldest recorded age at locality: 167
Youngest recorded age at locality: 167

mindat Locality ID: 17475
mindat URL: http://www.mindat.org/loc-17475.html

Tectonic Settings:

Total number of sublocalities beneath "Skagit Co., Washington, USA": 89
Total number of bottom-level sublocalities: 61

Number of Child Localities: 29
Child Localities:
Anacortes
Bald Mountain
Bellingham
Bellingham Claim
Boston Basin
Burlington
Cascade District
Cascade River
Clear Lake
Cypress Island
Dispassi Creek
Fidalgo Island
Finney Creek
Forbidden Peak
Granite Creek
Hamilton
La Conner
Lizard Mountain
Marblemount
Mount Higgins
Mount Vernon
Nookachamps Creek
Rockport
Soldier Boy Creek
Split Rock
Suiattle River
Swinomish Bay
Three Lakes
Thurnwood

Latitude: 48°27'42"N
Longitude: 121°52'37"W
Decimal Degree (lat, lon): 48.461666666667,-121.87694444444

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.

Amorphous	Amphibole	Apatite	Aragonite	Arsenopyrite	Baryte	Brucite	Calcite	Chalcopyrite	Chlorite
Chloritoid	Clay	Copper	Corundum	Cristobalite	Diaspore	Garnet	Kaolinite	Linarite	Malachite
Marcasite	None	Not in a structural group	Pectolite	Prehnite	Pyrite	Pyroxene	Quartz	Rocksalt	Rutile
Sepiolite	Serpentine	Smectite-vermiculite	Sphalerite	Spinel	Staurolite	Stilpnomelane	Talc	Tetrahedrite	Vivianite

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 C Ca Cl Cr Cu Fe H K Mg Mn Na O Pb S Sb Si Sr Ti Zn

Elements from minerals reported directly at this locality:

Structural Groups for minerals in this locality:
Amorphous Amphibole Apatite Aragonite Arsenopyrite Baryte Brucite Calcite Chalcopyrite Chlorite
Chloritoid Clay Copper Corundum Cristobalite Diaspore Garnet Kaolinite Linarite Malachite
Marcasite None Not in a structural group Pectolite Prehnite Pyrite Pyroxene Quartz Rocksalt Rutile
Sepiolite Serpentine Smectite-vermiculite Sphalerite Spinel Staurolite Stilpnomelane Talc Tetrahedrite Vivianite

59 IMA Minerals at location:

Actinolite ()*	Anglesite ()*	Ankerite ()*	Anthophyllite ()*	Antigorite ()*
Arsenopyrite ()*	Azurite ()*	Bementite ()*	Bornite ()*	Brucite ()*
Calcite ()*	Celestine ()*	Cerussite ()*	Chalcopyrite ()*	Chloritoid ()*
Chromite ()*	Chrysotile ()*	Clinochlore ()*	Copper ()*	Cristobalite ()*
Deerite ()*	Diopside ()*	Dolomite ()*	Galena ()*	Glaucophane ()*
Goethite ()*	Gold ()*	Graphite ()*	Grossular ()*	Hematite ()*
Hisingerite ()*	Hörnesite ()*	Jadeite ()*	Kyanite ()*	Linarite ()*
Magnesite ()*	Magnetite ()*	Malachite ()*	Marcasite ()*	Mimetite ()*
Omphacite ()*	Opal ()*	Pectolite ()*	Prehnite ()*	Pyrite ()*
Pyrope ()*	Quartz ()*	Realgar ()*	Rutile ()*	Sepiolite ()*
Siderite ()*	Sphalerite ()*	Staurolite ()*	Stilpnomelane ()*	Strontianite ()*
Talc ()*	Tetrahedrite-(Zn) ()*	Vermiculite ()*	Xonotlite ()*

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
Actinolite ()*	Amphibole	Ca₂(Mg_4.5-2.5Fe²⁺_0.5-2.5)Si₈O₂₂(OH)₂			3	285466,285475,285483	3419
Anglesite ()*	Baryte	Pb(SO₄)			1	285438	2734
Ankerite ()*	None	Ca(Fe²⁺,Mg)(CO₃)₂			2	285483,285487	3092
Anthophyllite ()*	Amphibole	Mg₂Mg₅Si₈O₂₂(OH)₂			2	285488,285505	718
Antigorite ()*	Serpentine Clay	Mg₃Si₂O₅(OH)₄			1	285433	708
Arsenopyrite ()*	Arsenopyrite	FeAsS			1	285485	9052
Azurite ()*	Not in a structural group	Cu₃(CO₃)₂(OH)₂			1	285438	5509
Bementite ()*	Clay	Mn₇Si₆O₁₅(OH)₈			2	285464,285465	173
Bornite ()*	None	Cu₅FeS₄			2	285423,285485	5516
Brucite ()*	Brucite	Mg(OH)₂			1	285433	462
Calcite ()*	Calcite	Ca(CO₃)			5	285428,285438,285474,285487,285489	27770
Celestine ()*	Baryte	Sr(SO₄)			1	285474	1252
Cerussite ()*	Aragonite	Pb(CO₃)			1	285438	4979
Chalcopyrite ()*	Chalcopyrite	CuFeS₂			9	285422,285423,285431,285436,285438,285442,285464,285465,285485	27198
Chloritoid ()*	Chloritoid	Fe²⁺Al₂O(SiO₄)(OH)₂			1	285478	376
Chromite ()*	Spinel	Fe²⁺Cr₂O₄	167	167	16	285420,285429,285448,285450,285451,285453,285454,285455,285458,285462,285487,285499,285500,285501,285502,285503	3902
Chrysotile ()*	Serpentine Clay	Mg₃Si₂O₅(OH)₄			1	285487	951
Clinochlore ()*	Chlorite Clay	Mg₅Al(AlSi₃O₁₀)(OH)₈	167	167	1	285455	1756
Copper ()*	Copper	Cu			3	285423,285464,285465	3846
Cristobalite ()*	Cristobalite	SiO₂			1	285489	453
Deerite ()*	None	Fe²⁺₆Fe³⁺₃(Si₆O₁₇)O₃(OH)₅			1	285466	27
Diopside ()*	Pyroxene	CaMgSi₂O₆			1	285433	4135
Dolomite ()*	None	CaMg(CO₃)₂			1	285487	9895
Galena ()*	Rocksalt	PbS			3	285438,285442,285468	24243
Glaucophane ()*	Amphibole	Na₂(Mg₃Al₂)Si₈O₂₂(OH)₂			1	285472	286
Goethite ()*	Diaspore	FeO(OH)			2	285489,285496	7437
Gold ()*	Copper	Au			5	285419,285424,285462,285469,285487	30554
Graphite ()*	None	C			3	285433,285493,285497	2812
Grossular ()*	Garnet	Ca₃Al₂(SiO₄)₃			1	285436	1544
Hematite ()*	Corundum	Fe₂O₃			3	285466,285472,285489	14640
Hisingerite ()*	Kaolinite Clay	Fe₂Si₂O₅(OH)₄·2H₂O			1	285489	144
Hörnesite ()*	Vivianite	Mg₃(AsO₄)₂·8H₂O			2	285473,285474	103
Jadeite ()*	Pyroxene	NaAlSi₂O₆			2	285466,285488	154
Kyanite ()*	Not in a structural group	Al₂OSiO₄			1	285438	1507
Linarite ()*	Linarite	CuPb(SO₄)(OH)₂			1	285438	987
Magnesite ()*	Calcite	Mg(CO₃)			3	285433,285487,285498	1487
Magnetite ()*	Spinel	Fe²⁺Fe³⁺₂O₄			2	285466,285472	14899
Malachite ()*	Malachite	Cu₂(CO₃)(OH)₂			1	285438	12537
Marcasite ()*	Marcasite	FeS₂			1	285487	5674
Mimetite ()*	Apatite	Pb₅(AsO₄)₃Cl			1	285438	1107
Omphacite ()*	Pyroxene	(Ca,Na)(Mg,Fe,Al)Si₂O₆			1	285471	229
Opal ()*	Amorphous	SiO₂·nH₂O			1	285487	2994
Pectolite ()*	Pectolite	NaCa₂Si₃O₈(OH)			3	285446,285456,285458	363
Prehnite ()*	Prehnite	Ca₂Al(Si₃Al)O₁₀(OH)₂			3	285446,285456,285458	1898
Pyrite ()*	Pyrite	FeS₂			10	285422,285423,285428,285431,285436,285442,285485,285487,285489,285495	39462
Pyrope ()*	Garnet	Mg₃Al₂(SiO₄)₃			1	285437	341
Quartz ()*	Quartz	SiO₂			12	285422,285428,285431,285436,285438,285439,285442,285466,285474,285487,285489,285496	61156
Realgar ()*	None	AsS			3	285433,285474,285490	712
Rutile ()*	Rutile	TiO₂			1	285489	5614
Sepiolite ()*	Sepiolite Clay	Mg₄Si₆O₁₅(OH)₂·6H₂O			1	285488	241
Siderite ()*	Calcite	Fe(CO₃)			2	285428,285489	6417
Sphalerite ()*	Sphalerite	ZnS			1	285438	21482
Staurolite ()*	Staurolite	Fe²⁺₂Al₉Si₄O₂₃(OH)			1	285438	978
Stilpnomelane ()*	Stilpnomelane Clay	(K,Ca,Na)(Fe,Mg,Al)₈(Si,Al)₁₂(O,OH)₃₆·nH₂O			1	285428	456
Strontianite ()*	Aragonite	Sr(CO₃)			2	285473,285474	589
Talc ()*	Clay Talc	Mg₃Si₄O₁₀(OH)₂			8	285444,285477,285480,285481,285482,285483,285488,285505	3337
Tetrahedrite-(Zn) ()*	Tetrahedrite	Cu₆(Cu₄Zn₂)Sb₄S₁₃			1	285485	5317
Vermiculite ()*	Clay Smectite-vermiculite	Mg_0.7(Mg,Fe,Al)₆(Si,Al)₈O₂₀(OH)₄·8H₂O			1	285483	652
Xonotlite ()*	None	Ca₆Si₆O₁₇(OH)₂			3	285446,285456,285458	109

2 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
	podchrome-00478	167	167	Middle Jurassic (167±5 Ma U-Pb zircon)										Cr	68892	Smith Open Cut, Hill 1262, Cypress Island, Skagit Co., Washington, USA	Smith Open Cut	Moiser et al. (2012)		USGSSIR2012_5157
	podchrome-00486	167	167	Middle Jurassic (167±5 Ma U-Pb zircon)										Cr	17674	Ready Cash Mine, Cypress Island, Skagit Co., Washington, USA	Ready Cash	Moiser et al. (2012)		USGSSIR2012_5157

Sample	Source Locality	Reference URL
R060334	Blanchard Hill (Blanchard Mountain), Bellingham, Skagit Co., Washington, USA	https://rruff.info/R060334
X050157	Fidalgo Island, Skagit Co., Washington, USA	https://rruff.info/X050157
R050476	Fidalgo Island, Skagit Co., Washington, USA	https://rruff.info/R050476
R110130	Little Deer Creek, Rockport, Skagit Co., Washington, USA	https://rruff.info/R110130

All locality data graciously provided by mindat.org

All age data...