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Humpback Mountain Slump Zone, Hansen Creek, North Bend, King Co., Washington, USA

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Latitude & Longitude (WGS84): 47° 23' 0'' North , 121° 30' 19'' West
Latitude & Longitude (decimal): 47.38350,-121.50541
GeoHash:G#: c23te1fky
Area:1.0 km2
Locality type:Mountain Area (Active) - last checked 2018
Age:22 to 19 Ma
Geologic Time:Miocene
Dating method:Ar
Reference for age:Livingston, Vaughn E., (1971) Geology and Mineral Resources of King County, Washington, USA. Bulletin - Division of Mines and Geology (State of Washington) 63, Pages 200.
Köppen climate type:Csb : Warm-summer Mediterranean climate


Various minerals, such as gemmy quartz(to 6 inches) and the famous amethyst scepters(to 8 inches), may be found here.

Select Mineral List Type

Standard Detailed Strunz Dana Chemical Elements

Mineral List


13 valid minerals.

Rock Types Recorded

Note: this is a very new system on mindat.org and data is currently VERY limited. Please bear with us while we work towards adding this information!

Select Rock List Type

Alphabetical List Tree Diagram

Detailed Mineral List:

Actinolite
Formula: ☐{Ca2}{Mg4.5-2.5Fe0.5-2.5}(Si8O22)(OH)2
Colour: Light to dark green
Description: Occurs as parallel sprays of crystals included in quartz.
Reference: Eric He's Collection
'Breccia'
Reference: Eric He's Collection
Chalcopyrite
Formula: CuFeS2
Description: Occurs as euhedral xls up to 2cm.
Reference: Eric He's Collection
Chrysocolla
Formula: Cu2-xAlx(H2-xSi2O5)(OH)4 · nH2O
Description: Gemmy blue-green botryoidal masses
Reference: Eric He's Collection
'Clay'
Reference: Eric He's Collection
Clinochlore
Formula: Mg5Al(AlSi3O10)(OH)8
Description: Always found as dark-green sprays included in quartz.
Reference: Eric He's Collection; Ray Claude (1995) Mineral Sites of King County, Washington: 27
Goethite
Formula: α-Fe3+O(OH)
Description: Found as pseudomorphs after pyrite and siderite.
Reference: Eric He's Collection; Ray Claude (1995) Mineral Sites of King County, Washington: 27
Gold
Formula: Au
Description: Occurs extremely rarely as inclusions in gemmy quartz xls.
Reference: Eric He's Collection
'Granodiorite'
Reference: Eric He's Collection
Hematite
Formula: Fe2O3
Description: As pseudomorphs of siderite or as a thin coating on quartz crystals.
Reference: Eric He's Collection
'Intrusive breccia'
Reference: Eric He's Collection
Lepidocrocite
Formula: γ-Fe3+O(OH)
Description: Occurs as red 'raspberry' inclusions in quartz.
Reference: Eric He's Collection
'Limonite'
Formula: (Fe,O,OH,H2O)
Description: Occurs as a tough coating on quartz crystals.
Reference: Eric He's Collection
Pyrite
Formula: FeS2
Habit: Cubic.
Colour: Not very brassy, more grey.
Description: Found as cores of goethite pseudomorphs, thickness of goethite varies.
Reference: Eric He's Collection; Ray Claude (1995) Mineral Sites of King County, Washington: 27
Quartz
Formula: SiO2
Habit: Normal habit, Dauphiné habit, double terminated, and scepters occur. Japan law twins can be found, some are sceptered. Phantoms of bubbles are sometimes seen in scepters. Enhydros occur but are very rare.
Colour: Clear, milky, amethyst, smoky. Some xls with smoky-citrine color has been reported.
Reference: Eric He's Collection; Ray Claude (1995) Mineral Sites of King County, Washington: 27
Quartz var: Amethyst
Formula: SiO2
Habit: Most amethyst is found in scepters or other secondary growths.
Colour: Most are a light gemmy purple, some(rarely) has hints of blue or pink.
Reference: Ray Claude (1995) Mineral Sites of King County, Washington: 27
Quartz var: Milky Quartz
Formula: SiO2
Description: Common milky quartz, ranges from somewhat gemmy to completely opaque.
Reference: Ray Claude (1995) Mineral Sites of King County, Washington: 27
Quartz var: Rock Crystal
Formula: SiO2
Reference: Ray Claude (1995) Mineral Sites of King County, Washington: 27
Quartz var: Sceptre Quartz
Formula: SiO2
Reference: Ray Claude (1995) Mineral Sites of King County, Washington: 27
Quartz var: Smoky Quartz
Formula: SiO2
Reference: Ray Claude (1995) Mineral Sites of King County, Washington: 27
Rutile
Formula: TiO2
Habit: Needles
Colour: Yellow to green
Description: Found as inclusions within quartz.
Reference: Eric He's Collection; Ray Claude (1995) Mineral Sites of King County, Washington: 27
Siderite
Formula: FeCO3
Reference: Eric He's Collection; Ray Claude (1995) Mineral Sites of King County, Washington: 27
Stibnite
Formula: Sb2S3
Reference: Eric He's Collection
'Turgite'
Habit: N/A
Colour: Iridescent
Fluorescence: N/A
Description: Occurs rarely as a thin iridescent shell on xls of quartz.
Reference: Eric He's Collection

List of minerals arranged by Strunz 10th Edition classification

Group 1 - Elements
Gold1.AA.05Au
Group 2 - Sulphides and Sulfosalts
Chalcopyrite2.CB.10aCuFeS2
Pyrite2.EB.05aFeS2
Stibnite2.DB.05Sb2S3
Group 4 - Oxides and Hydroxides
Goethite4.00.α-Fe3+O(OH)
Hematite4.CB.05Fe2O3
Lepidocrocite4.FE.15γ-Fe3+O(OH)
Quartz4.DA.05SiO2
var: Amethyst4.DA.05SiO2
var: Milky Quartz4.DA.05SiO2
var: Rock Crystal4.DA.05SiO2
var: Sceptre Quartz4.DA.05SiO2
var: Smoky Quartz4.DA.05SiO2
Rutile4.DB.05TiO2
Group 5 - Nitrates and Carbonates
Siderite5.AB.05FeCO3
Group 9 - Silicates
'Actinolite'9.DE.10☐{Ca2}{Mg4.5-2.5Fe0.5-2.5}(Si8O22)(OH)2
Chrysocolla9.ED.20Cu2-xAlx(H2-xSi2O5)(OH)4 · nH2O
Clinochlore9.EC.55Mg5Al(AlSi3O10)(OH)8
Unclassified Minerals, Rocks, etc.
Breccia-
Clay-
Granodiorite-
Intrusive breccia-
Limonite-(Fe,O,OH,H2O)
Turgite-

List of minerals arranged by Dana 8th Edition classification

Group 1 - NATIVE ELEMENTS AND ALLOYS
Metals, other than the Platinum Group
Gold1.1.1.1Au
Group 2 - SULFIDES
AmBnXp, with (m+n):p = 1:1
Chalcopyrite2.9.1.1CuFeS2
AmBnXp, with (m+n):p = 2:3
Stibnite2.11.2.1Sb2S3
AmBnXp, with (m+n):p = 1:2
Pyrite2.12.1.1FeS2
Group 4 - SIMPLE OXIDES
A2X3
Hematite4.3.1.2Fe2O3
AX2
Rutile4.4.1.1TiO2
Group 6 - HYDROXIDES AND OXIDES CONTAINING HYDROXYL
XO(OH)
Goethite6.1.1.2α-Fe3+O(OH)
Lepidocrocite6.1.2.2γ-Fe3+O(OH)
Group 14 - ANHYDROUS NORMAL CARBONATES
A(XO3)
Siderite14.1.1.3FeCO3
Group 71 - PHYLLOSILICATES Sheets of Six-Membered Rings
Sheets of 6-membered rings interlayered 1:1, 2:1, and octahedra
Clinochlore71.4.1.4Mg5Al(AlSi3O10)(OH)8
Group 74 - PHYLLOSILICATES Modulated Layers
Modulated Layers with joined strips
Chrysocolla74.3.2.1Cu2-xAlx(H2-xSi2O5)(OH)4 · nH2O
Group 75 - TECTOSILICATES Si Tetrahedral Frameworks
Si Tetrahedral Frameworks - SiO2 with [4] coordinated Si
Quartz75.1.3.1SiO2
Unclassified Minerals, Rocks, etc.
Actinolite-☐{Ca2}{Mg4.5-2.5Fe0.5-2.5}(Si8O22)(OH)2
'Breccia'-
'Clay'-
'Granodiorite'-
'Intrusive breccia'-
'Limonite'-(Fe,O,OH,H2O)
Quartz
var: Amethyst
-SiO2
var: Milky Quartz-SiO2
var: Rock Crystal-SiO2
var: Sceptre Quartz-SiO2
var: Smoky Quartz-SiO2
'Turgite'-

List of minerals for each chemical element

HHydrogen
H Actinolite☐{Ca2}{Mg4.5-2.5Fe0.5-2.5}(Si8O22)(OH)2
H ChrysocollaCu2-xAlx(H2-xSi2O5)(OH)4 · nH2O
H ClinochloreMg5Al(AlSi3O10)(OH)8
H Goethiteα-Fe3+O(OH)
H Lepidocrociteγ-Fe3+O(OH)
H Limonite(Fe,O,OH,H2O)
CCarbon
C SideriteFeCO3
OOxygen
O Actinolite☐{Ca2}{Mg4.5-2.5Fe0.5-2.5}(Si8O22)(OH)2
O Quartz (var: Amethyst)SiO2
O ChrysocollaCu2-xAlx(H2-xSi2O5)(OH)4 · nH2O
O ClinochloreMg5Al(AlSi3O10)(OH)8
O Goethiteα-Fe3+O(OH)
O HematiteFe2O3
O Lepidocrociteγ-Fe3+O(OH)
O Limonite(Fe,O,OH,H2O)
O Quartz (var: Milky Quartz)SiO2
O QuartzSiO2
O Quartz (var: Rock Crystal)SiO2
O RutileTiO2
O Quartz (var: Sceptre Quartz)SiO2
O SideriteFeCO3
O Quartz (var: Smoky Quartz)SiO2
MgMagnesium
Mg Actinolite☐{Ca2}{Mg4.5-2.5Fe0.5-2.5}(Si8O22)(OH)2
Mg ClinochloreMg5Al(AlSi3O10)(OH)8
AlAluminium
Al ChrysocollaCu2-xAlx(H2-xSi2O5)(OH)4 · nH2O
Al ClinochloreMg5Al(AlSi3O10)(OH)8
SiSilicon
Si Actinolite☐{Ca2}{Mg4.5-2.5Fe0.5-2.5}(Si8O22)(OH)2
Si Quartz (var: Amethyst)SiO2
Si ChrysocollaCu2-xAlx(H2-xSi2O5)(OH)4 · nH2O
Si ClinochloreMg5Al(AlSi3O10)(OH)8
Si Quartz (var: Milky Quartz)SiO2
Si QuartzSiO2
Si Quartz (var: Rock Crystal)SiO2
Si Quartz (var: Sceptre Quartz)SiO2
Si Quartz (var: Smoky Quartz)SiO2
SSulfur
S ChalcopyriteCuFeS2
S PyriteFeS2
S StibniteSb2S3
CaCalcium
Ca Actinolite☐{Ca2}{Mg4.5-2.5Fe0.5-2.5}(Si8O22)(OH)2
TiTitanium
Ti RutileTiO2
FeIron
Fe Actinolite☐{Ca2}{Mg4.5-2.5Fe0.5-2.5}(Si8O22)(OH)2
Fe ChalcopyriteCuFeS2
Fe Goethiteα-Fe3+O(OH)
Fe HematiteFe2O3
Fe Lepidocrociteγ-Fe3+O(OH)
Fe Limonite(Fe,O,OH,H2O)
Fe PyriteFeS2
Fe SideriteFeCO3
CuCopper
Cu ChalcopyriteCuFeS2
Cu ChrysocollaCu2-xAlx(H2-xSi2O5)(OH)4 · nH2O
SbAntimony
Sb StibniteSb2S3
AuGold
Au GoldAu

References

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Year (asc) Year (desc) Author (A-Z) Author (Z-A)
Livingston, Vaughn E., (1971) Geology and Mineral Resources of King County, Washington, USA. Bulletin - Division of Mines and Geology (State of Washington) 63, Pages 200.


This page contains all mineral locality references listed on mindat.org. This does not claim to be a complete list. If you know of more minerals from this site, please register so you can add to our database. This locality information is for reference purposes only. You should never attempt to visit any sites listed in mindat.org without first ensuring that you have the permission of the land and/or mineral rights holders for access and that you are aware of all safety precautions necessary.
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