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⇱ Washougal meteorite, Washougal, Clark County, Washington, USA

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Washougal meteorite, Washougal, Clark County, Washington, USAi
Regional Level Types
Washougal meteoriteMeteorite Fall Location
Washougal- not defined -
Clark CountyCounty
WashingtonState
USACountry

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Latitude & Longitude (WGS84):
45° 34' 59'' North , 122° 21' 0'' West
Latitude & Longitude (decimal):
Nearest Settlements:
PlacePopulationDistance
Washougal15,288 (2017)0.3km
Camas21,846 (2017)3.9km
Troutdale16,631 (2017)5.7km
Fern Prairie1,884 (2011)7.0km
Wood Village4,017 (2017)7.6km
Nearest Clubs:
Local clubs are the best way to get access to collecting localities
ClubLocationDistance
Mt Hood Rock ClubGresham, Oregon11km
Millennium Diggers ClubPortland, Oregon26km
Oregon Agate & Mineral Society, Inc.Portland, Oregon26km
Columbia-Willamette Faceters' GuildPortland/West Linn, Oregon32km
Clackamette Mineral and Gem ClubOregon City, Oregon32km
Mindat Locality ID:
107188
Long-form identifier:
mindat:1:2:107188:0
GUID (UUID V4):
0


Howardite (HED achondrite)
Fell 2 July 1939, 225 g

After loud detonations at 8:00am PST July 2, 1939, a small friable stone was recovered a day later near the town of Washougal. It turned out to be a new member of the rare Howardite class of achondritic meteorites. Howardites are brecciated mixtures of Eucritic pyroxene-plagioclase intergrowths with Diogenitic plutonic pyroxenites — and Washougal itself is an approximately half-half Eucrite-Diogenite mix. Predominant silicates include orthopyroxenes (both bronzite and hypersthene), clinopyroxenes, and variable plagioclase of predominantly bytownite composition. Tridymite, found in ubiquitous tiny eucritic clasts, and xenolithic olivine are also present. Opaques include Chromite, Ilmenite and Kamacite.

As Washougal is a very small stone, detailed references — other than the Jérome & Michel-Lévy (1972) account — are both few in number and sparse on detail. Fossil track dating, however, confirms that the mineral aggregates within the Washougal meteorite — as in most Howardites —were formed roughly 4.4-4.5 billion years ago.

Select Mineral List Type

Standard Detailed Gallery Strunz Chemical Elements

Mineral List


11 valid minerals.

Meteorite/Rock Types Recorded

Note: data is currently VERY limited. Please bear with us while we work towards adding this information!

Select Rock List Type

Alphabetical List Tree Diagram

Entries shown in red are rocks recorded for this region.

Detailed Mineral List:

ⓘ Albite
Formula: Na(AlSi3O8)
ⓘ Albite var. Andesine
Formula: (Na,Ca)[Al(Si,Al)Si2O8]
ⓘ Anorthite
Formula: Ca(Al2Si2O8)
ⓘ Anorthite var. Bytownite
Formula: (Ca,Na)[Al(Al,Si)Si2O8]
ⓘ Augite
Formula: (CaxMgyFez)(Mgy1Fez1)Si2O6
ⓘ Chromite
Formula: Fe2+Cr3+2O4
ⓘ Clinoenstatite
Formula: MgSiO3
ⓘ 'Clinopyroxene Subgroup'
ⓘ Enstatite
Formula: Mg2Si2O6
ⓘ Enstatite var. Bronzite
Formula: (Mg,Fe2+)2[SiO3]2
ⓘ 'Fayalite-Forsterite Series'
Description: Olivine in dunite clast & elsewhere; OLivine (Fa 12.6) is homogeneous in the large dunite xenolith
ⓘ 'Hypersthene'
Formula: (Mg,Fe)SiO3
Description: Hypersthene - As exsolved lamellae from Pigeonite
ⓘ Ilmenite
Formula: Fe2+TiO3
ⓘ Native Iron
Formula: Fe
ⓘ Native Iron var. Kamacite
Formula: (Fe,Ni)
ⓘ Pigeonite
Formula: (CaxMgyFez)(Mgy1Fez1)Si2O6
ⓘ 'Plagioclase'
Formula: (Na,Ca)[(Si,Al)AlSi2]O8
Description: Plagioclase with compositions from An68-An100, but is mostly of Bytownite compositions clustered around An90.
ⓘ Tridymite
Formula: SiO2
Description: Minor in overall abundance, Tridymite is ubiquitous in small euhedral & anhedral eucritic clasts and debris-rich clasts
ⓘ Troilite
Formula: FeS
Description: Troilite is apparently quite scarce, but is found as very small inclusions in pyroxene

Gallery:

List of minerals arranged by Strunz 10th Edition classification

Group 1 - Elements
ⓘNative Iron1.AE.05Fe
ⓘvar. Kamacite1.AE.05(Fe,Ni)
Group 2 - Sulphides and Sulfosalts
ⓘTroilite2.CC.10FeS
Group 4 - Oxides and Hydroxides
ⓘChromite4.BB.05Fe2+Cr3+2O4
ⓘIlmenite4.CB.05Fe2+TiO3
ⓘTridymite4.DA.10SiO2
Group 9 - Silicates
ⓘEnstatite9.DA.05Mg2Si2O6
ⓘvar. Bronzite9.DA.05(Mg,Fe2+)2[SiO3]2
ⓘClinoenstatite9.DA.10MgSiO3
ⓘPigeonite9.DA.10(CaxMgyFez)(Mgy1Fez1)Si2O6
ⓘAugite9.DA.15(CaxMgyFez)(Mgy1Fez1)Si2O6
ⓘAlbite9.FA.35Na(AlSi3O8)
ⓘvar. Andesine9.FA.35(Na,Ca)[Al(Si,Al)Si2O8]
ⓘAnorthite9.FA.35Ca(Al2Si2O8)
ⓘvar. Bytownite9.FA.35(Ca,Na)[Al(Al,Si)Si2O8]
Unclassified
ⓘ'Hypersthene'-(Mg,Fe)SiO3
ⓘ'Clinopyroxene Subgroup'-
ⓘ'Fayalite-Forsterite Series'-
ⓘ'Plagioclase'-(Na,Ca)[(Si,Al)AlSi2]O8

List of minerals for each chemical element

OOxygen
Oⓘ AlbiteNa(AlSi3O8)
Oⓘ Albite var. Andesine(Na,Ca)[Al(Si,Al)Si2O8]
Oⓘ AnorthiteCa(Al2Si2O8)
Oⓘ Augite(CaxMgyFez)(Mgy1Fez1)Si2O6
Oⓘ Anorthite var. Bytownite(Ca,Na)[Al(Al,Si)Si2O8]
Oⓘ ChromiteFe2+Cr23+O4
Oⓘ ClinoenstatiteMgSiO3
Oⓘ EnstatiteMg2Si2O6
Oⓘ Hypersthene(Mg,Fe)SiO3
Oⓘ IlmeniteFe2+TiO3
Oⓘ Pigeonite(CaxMgyFez)(Mgy1Fez1)Si2O6
Oⓘ TridymiteSiO2
Oⓘ Enstatite var. Bronzite(Mg,Fe2+)2[SiO3]2
Oⓘ Fayalite-Forsterite Series
Oⓘ Plagioclase(Na,Ca)[(Si,Al)AlSi2]O8
NaSodium
Naⓘ AlbiteNa(AlSi3O8)
Naⓘ Albite var. Andesine(Na,Ca)[Al(Si,Al)Si2O8]
Naⓘ Anorthite var. Bytownite(Ca,Na)[Al(Al,Si)Si2O8]
Naⓘ Plagioclase(Na,Ca)[(Si,Al)AlSi2]O8
MgMagnesium
Mgⓘ Augite(CaxMgyFez)(Mgy1Fez1)Si2O6
Mgⓘ ClinoenstatiteMgSiO3
Mgⓘ EnstatiteMg2Si2O6
Mgⓘ Hypersthene(Mg,Fe)SiO3
Mgⓘ Pigeonite(CaxMgyFez)(Mgy1Fez1)Si2O6
Mgⓘ Enstatite var. Bronzite(Mg,Fe2+)2[SiO3]2
Mgⓘ Fayalite-Forsterite Series
AlAluminium
Alⓘ AlbiteNa(AlSi3O8)
Alⓘ Albite var. Andesine(Na,Ca)[Al(Si,Al)Si2O8]
Alⓘ AnorthiteCa(Al2Si2O8)
Alⓘ Anorthite var. Bytownite(Ca,Na)[Al(Al,Si)Si2O8]
Alⓘ Plagioclase(Na,Ca)[(Si,Al)AlSi2]O8
SiSilicon
Siⓘ AlbiteNa(AlSi3O8)
Siⓘ Albite var. Andesine(Na,Ca)[Al(Si,Al)Si2O8]
Siⓘ AnorthiteCa(Al2Si2O8)
Siⓘ Augite(CaxMgyFez)(Mgy1Fez1)Si2O6
Siⓘ Anorthite var. Bytownite(Ca,Na)[Al(Al,Si)Si2O8]
Siⓘ ClinoenstatiteMgSiO3
Siⓘ EnstatiteMg2Si2O6
Siⓘ Hypersthene(Mg,Fe)SiO3
Siⓘ Pigeonite(CaxMgyFez)(Mgy1Fez1)Si2O6
Siⓘ TridymiteSiO2
Siⓘ Enstatite var. Bronzite(Mg,Fe2+)2[SiO3]2
Siⓘ Fayalite-Forsterite Series
Siⓘ Plagioclase(Na,Ca)[(Si,Al)AlSi2]O8
SSulfur
Sⓘ TroiliteFeS
CaCalcium
Caⓘ Albite var. Andesine(Na,Ca)[Al(Si,Al)Si2O8]
Caⓘ AnorthiteCa(Al2Si2O8)
Caⓘ Augite(CaxMgyFez)(Mgy1Fez1)Si2O6
Caⓘ Anorthite var. Bytownite(Ca,Na)[Al(Al,Si)Si2O8]
Caⓘ Pigeonite(CaxMgyFez)(Mgy1Fez1)Si2O6
Caⓘ Plagioclase(Na,Ca)[(Si,Al)AlSi2]O8
TiTitanium
Tiⓘ IlmeniteFe2+TiO3
CrChromium
Crⓘ ChromiteFe2+Cr23+O4
FeIron
Feⓘ Augite(CaxMgyFez)(Mgy1Fez1)Si2O6
Feⓘ ChromiteFe2+Cr23+O4
Feⓘ Hypersthene(Mg,Fe)SiO3
Feⓘ IlmeniteFe2+TiO3
Feⓘ Native IronFe
Feⓘ Native Iron var. Kamacite(Fe,Ni)
Feⓘ Pigeonite(CaxMgyFez)(Mgy1Fez1)Si2O6
Feⓘ TroiliteFeS
Feⓘ Enstatite var. Bronzite(Mg,Fe2+)2[SiO3]2
Feⓘ Fayalite-Forsterite Series
NiNickel
Niⓘ Native Iron var. Kamacite(Fe,Ni)

Other Regions, Features and Areas containing this locality


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