Log InRegister
Home PageAbout MindatThe Mindat ManualHistory of MindatCopyright StatusWho We AreContact UsAdvertise on Mindat
Donate to MindatCorporate SponsorshipSponsor a PageSponsored PagesMindat AdvertisersAdvertise on Mindat
Learning CenterWhat is a mineral?The most common minerals on earthInformation for EducatorsMindat ArticlesThe ElementsBooks & Magazines
Minerals by PropertiesMinerals by ChemistryAdvanced Locality SearchRandom MineralRandom LocalitySearch by minIDLocalities Near MeSearch ArticlesSearch GlossaryMore Search Options
Search For:
Mineral Name:
Locality Name:
Keyword(s):
 
The Mindat ManualAdd a New PhotoRate PhotosLocality Edit ReportCoordinate Completion ReportAdd Glossary Item
Mining CompaniesStatisticsUsersMineral MuseumsMineral Shows & EventsThe Mindat DirectoryDevice Settings
Photo SearchPhoto GalleriesNew Photos TodayNew Photos YesterdayMembers' Photo GalleriesPast Photo of the Day GalleryMineral Photography

Rockhound Gulch (Denny Creek), Denny Mountain, King Co., Washington, USAi
Regional Level Types
Rockhound Gulch (Denny Creek)Gulch
Denny MountainMountain
King Co.County
WashingtonState
USACountry

This page is currently not sponsored. Click here to sponsor this page.
Key
04555690014946986034587.jpg
Much higher into the Rockhound Gulch - this is NOT an easy hike!

Rockhound Gulch, Denny Mountain, King Co., Washington, USA
04555690014946986034587.jpg
Much higher into the Rockhound Gulch - this is NOT an easy hike!

Rockhound Gulch, Denny Mountain, King Co., Washington, USA
Latitude & Longitude (WGS84):
47° 25' 2'' North , 121° 26' 26'' West
Latitude & Longitude (decimal):
Locality type:
Nearest Settlements:
PlacePopulationDistance
Snoqualmie Pass311 (2011)4.1km
Tanner1,018 (2011)23.9km
Riverbend2,132 (2011)23.9km
Wilderness Rim1,523 (2017)24.9km
North Bend6,679 (2017)27.4km


To reach Rockhound Gulch, take the Melakwa Lakes trail no. 1014. You will start on the west side of Denny Creek, cross to the east side via a large hewn log bridge, cross back to the west side where the trail descends a bank to a rock crossing. After this second crossing, the trail switchbacks up a hill, then comes back close to the creek canyon. At this point you will have a wide view of the cliffs of Low Mountain (5000 feet) on your left. Just after you see this view, the trail turns left, and a poor trial goes off the right side down into Denny Creek canyon, across a flat rock outcrop above a waterfall, to a rocky-bottomed canyon up the side of Denny Mountain. This is Rockhound Gulch.


This locality is now closed to collecting.

Select Mineral List Type

Standard Detailed Gallery Strunz Dana Chemical Elements

Commodity List

This is a list of exploitable or exploited mineral commodities recorded at this locality.


Mineral List


10 valid minerals. 1 erroneous literature entry.

Detailed Mineral List:

'Amphibole Supergroup'
Formula: AX2Z5((Si,Al,Ti)8O22)(OH,F,Cl,O)2
'Amphibole Supergroup var: '
Formula: AX2Z5((Si,Al,Ti)8O22)(OH,F,Cl,O)2
Calcite
Formula: CaCO3
Reference: Karl Volkman personal collection
'Chlorite Group'
Reference: Minerals of Washington, B. Cannon, 1975
Diopside
Formula: CaMgSi2O6
Habit: blocky crystals to .75 inches
Colour: greenish
Reference: Cannon, B. (1975): Minerals of Washington, p.82
Epidote
Formula: {Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)
Habit: crystal sprays
Colour: dark Green
Reference: Cannon, B. (1975): Minerals of Washington, p.82,85
Goethite
Formula: α-Fe3+O(OH)
Reference: Minerals of Washington, B. Cannon, 1975
Grossular
Formula: Ca3Al2(SiO4)3
Reference: Cannon, B. (1975): Minerals of Washington, p.82
Hematite
Formula: Fe2O3
Habit: specular
Description: Forms platy aggregates, sometimes as terminated rosettes. Often, entire pockets are filled with hematite.
Reference: Cannon, B. (1975): Minerals of Washington, p.82,85
'K Feldspar'
Reference: Cannon, B. (1975): Minerals of Washington, p.85
'K Feldspar var: '
Formula: KAlSi3O8
Reference: Cannon, B. (1975): Minerals of Washington, p.85
Lepidocrocite
Formula: γ-Fe3+O(OH)
Description: The strawberry and black inclusions in the amethyst scepters are hematite. No lepidocrocite has ever been found here.
Reference: John Lindell, Bart Cannon personal communication (RWMW)
Malachite
Formula: Cu2(CO3)(OH)2
Reference: Minerals of Washington, B. Cannon, 1975
Pyrite
Formula: FeS2
Description: Occurs (rarely) as unoxidized cubes, but more commonly as goethite pseudomorphs.
Reference: Eric He's Collection
Quartz
Formula: SiO2
Habit: Frequent Normal Prisms some with heamtite inclusions to a few cm. Spectacular large rare Japanese Twins to over 30 cm ear to ear
Colour: colourles to red from inclusions
Fluorescence: none
Description: The normal prisms are common but not the killer twins
Reference: Cannon, B. (1975): Minerals of Washington, p.85
Quartz var:
Formula: SiO2
Habit: doubly terminated scepters on clear quartz prisms to a few cm
Colour: strawberry purple
Description: Hematite inclusions in the Amethyst give the strawberry colour.
Reference: UBC specimen
Scheelite
Formula: Ca(WO4)
Reference: Minerals of Washington, B. Cannon, 1975

Gallery:

List of minerals arranged by Strunz 10th Edition classification

Group 2 - Sulphides and Sulfosalts
Pyrite2.EB.05aFeS2
Group 4 - Oxides and Hydroxides
Goethite4.00.α-Fe3+O(OH)
Hematite4.CB.05Fe2O3
Lepidocrocite ?4.FE.15γ-Fe3+O(OH)
Quartz4.DA.05SiO2
var: Amethyst4.DA.05SiO2
Group 5 - Nitrates and Carbonates
Calcite5.AB.05CaCO3
Malachite5.BA.10Cu2(CO3)(OH)2
Group 7 - Sulphates, Chromates, Molybdates and Tungstates
Scheelite7.GA.05Ca(WO4)
Group 9 - Silicates
Diopside9.DA.15CaMgSi2O6
Epidote9.BG.05a{Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)
Grossular9.AD.25Ca3Al2(SiO4)3
Unclassified Minerals, Rocks, etc.
'Amphibole Supergroup'-AX2Z5((Si,Al,Ti)8O22)(OH,F,Cl,O)2
'var: Byssolite'-AX2Z5((Si,Al,Ti)8O22)(OH,F,Cl,O)2
'Chlorite Group'-
'K Feldspar'-
'var: Adularia'-KAlSi3O8

List of minerals arranged by Dana 8th Edition classification

Group 2 - SULFIDES
AmBnXp, with (m+n):p = 1:2
Pyrite2.12.1.1FeS2
Group 4 - SIMPLE OXIDES
A2X3
Hematite4.3.1.2Fe2O3
Group 6 - HYDROXIDES AND OXIDES CONTAINING HYDROXYL
XO(OH)
Goethite6.1.1.2α-Fe3+O(OH)
Lepidocrocite ?6.1.2.2γ-Fe3+O(OH)
Group 14 - ANHYDROUS NORMAL CARBONATES
A(XO3)
Calcite14.1.1.1CaCO3
Group 16a - ANHYDROUS CARBONATES CONTAINING HYDROXYL OR HALOGEN
Malachite16a.3.1.1Cu2(CO3)(OH)2
Group 48 - ANHYDROUS MOLYBDATES AND TUNGSTATES
AXO4
Scheelite48.1.2.1Ca(WO4)
Group 51 - NESOSILICATES Insular SiO4 Groups Only
Insular SiO4 Groups Only with cations in [6] and >[6] coordination
Grossular51.4.3b.2Ca3Al2(SiO4)3
Group 58 - SOROSILICATES Insular, Mixed, Single, and Larger Tetrahedral Groups
Insular, Mixed, Single, and Larger Tetrahedral Groups with cations in [6] and higher coordination; single and double groups (n = 1, 2)
Epidote58.2.1a.7{Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)
Group 65 - INOSILICATES Single-Width,Unbranched Chains,(W=1)
Single-Width Unbranched Chains, W=1 with chains P=2
Diopside65.1.3a.1CaMgSi2O6
Group 75 - TECTOSILICATES Si Tetrahedral Frameworks
Si Tetrahedral Frameworks - SiO2 with [4] coordinated Si
Quartz75.1.3.1SiO2
Unclassified Minerals, Mixtures, etc.
'Amphibole Supergroup'-AX2Z5((Si,Al,Ti)8O22)(OH,F,Cl,O)2
'var: Byssolite'-AX2Z5((Si,Al,Ti)8O22)(OH,F,Cl,O)2
'Chlorite Group'-
'K Feldspar'-
'var: Adularia'-KAlSi3O8
Quartz
var: Amethyst
-SiO2

List of minerals for each chemical element

HHydrogen
H Epidote{Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)
H Amphibole Supergroup (var: Byssolite)AX2Z5((Si,Al,Ti)8O22)(OH,F,Cl,O)2
H MalachiteCu2(CO3)(OH)2
H Goethiteα-Fe3+O(OH)
H Amphibole SupergroupAX2Z5((Si,Al,Ti)8O22)(OH,F,Cl,O)2
H Lepidocrociteγ-Fe3+O(OH)
CCarbon
C CalciteCaCO3
C MalachiteCu2(CO3)(OH)2
OOxygen
O Quartz (var: Amethyst)SiO2
O QuartzSiO2
O Epidote{Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)
O CalciteCaCO3
O Amphibole Supergroup (var: Byssolite)AX2Z5((Si,Al,Ti)8O22)(OH,F,Cl,O)2
O GrossularCa3Al2(SiO4)3
O HematiteFe2O3
O K Feldspar (var: Adularia)KAlSi3O8
O ScheeliteCa(WO4)
O DiopsideCaMgSi2O6
O MalachiteCu2(CO3)(OH)2
O Goethiteα-Fe3+O(OH)
O Amphibole SupergroupAX2Z5((Si,Al,Ti)8O22)(OH,F,Cl,O)2
O Lepidocrociteγ-Fe3+O(OH)
FFluorine
F Amphibole Supergroup (var: Byssolite)AX2Z5((Si,Al,Ti)8O22)(OH,F,Cl,O)2
F Amphibole SupergroupAX2Z5((Si,Al,Ti)8O22)(OH,F,Cl,O)2
MgMagnesium
Mg DiopsideCaMgSi2O6
AlAluminium
Al Epidote{Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)
Al Amphibole Supergroup (var: Byssolite)AX2Z5((Si,Al,Ti)8O22)(OH,F,Cl,O)2
Al GrossularCa3Al2(SiO4)3
Al K Feldspar (var: Adularia)KAlSi3O8
Al Amphibole SupergroupAX2Z5((Si,Al,Ti)8O22)(OH,F,Cl,O)2
SiSilicon
Si Quartz (var: Amethyst)SiO2
Si QuartzSiO2
Si Epidote{Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)
Si Amphibole Supergroup (var: Byssolite)AX2Z5((Si,Al,Ti)8O22)(OH,F,Cl,O)2
Si GrossularCa3Al2(SiO4)3
Si K Feldspar (var: Adularia)KAlSi3O8
Si DiopsideCaMgSi2O6
Si Amphibole SupergroupAX2Z5((Si,Al,Ti)8O22)(OH,F,Cl,O)2
SSulfur
S PyriteFeS2
ClChlorine
Cl Amphibole Supergroup (var: Byssolite)AX2Z5((Si,Al,Ti)8O22)(OH,F,Cl,O)2
Cl Amphibole SupergroupAX2Z5((Si,Al,Ti)8O22)(OH,F,Cl,O)2
KPotassium
K K Feldspar (var: Adularia)KAlSi3O8
CaCalcium
Ca Epidote{Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)
Ca CalciteCaCO3
Ca GrossularCa3Al2(SiO4)3
Ca ScheeliteCa(WO4)
Ca DiopsideCaMgSi2O6
TiTitanium
Ti Amphibole Supergroup (var: Byssolite)AX2Z5((Si,Al,Ti)8O22)(OH,F,Cl,O)2
Ti Amphibole SupergroupAX2Z5((Si,Al,Ti)8O22)(OH,F,Cl,O)2
FeIron
Fe Epidote{Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)
Fe HematiteFe2O3
Fe Goethiteα-Fe3+O(OH)
Fe PyriteFeS2
Fe Lepidocrociteγ-Fe3+O(OH)
CuCopper
Cu MalachiteCu2(CO3)(OH)2
WTungsten
W ScheeliteCa(WO4)

References

Sort by

Year (asc) Year (desc) Author (A-Z) Author (Z-A) In-text Citation No.
Bob Jackson (1974) Rockhound's Guide to Washington.
Cannon, B. (1975): Minerals of Washington: 82, 85.

Other Regions, Features and Areas containing this locality

North America
North America PlateTectonic Plate

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.
 
Mineral and/or Locality  
Mindat.org is an outreach project of the Hudson Institute of Mineralogy, a 501(c)(3) not-for-profit organization. Public Relations by Blytheweigh.
Copyright © mindat.org and the Hudson Institute of Mineralogy 1993-2020, except where stated. Most political location boundaries are © OpenStreetMap contributors. Mindat.org relies on the contributions of thousands of members and supporters.
Privacy Policy - Terms & Conditions - Contact Us Current server date and time: May 25, 2020 00:35:28 Page generated: May 22, 2020 16:03:23
Go to top of page