Washougal meteorite, Washougal, Clark County, Washington, USA i
Regional Level Types
Washougal meteorite Meteorite Fall Location
Washougal - not defined -
Clark County County
Washington State
USA Country

Club	Location	Distance
Mt Hood Rock Club	Gresham, Oregon	11km
Millennium Diggers Club	Portland, Oregon	26km
Oregon Agate & Mineral Society, Inc.	Portland, Oregon	26km
Columbia-Willamette Faceters' Guild	Portland/West Linn, Oregon	32km
Clackamette Mineral and Gem Club	Oregon City, Oregon	32km

Mindat Locality ID:

107188

Long-form identifier:

mindat:1:2:107188:0

GUID (UUID V4):

fea51a61-b97f-4456-932e-629070bd6284

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.

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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!

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Alphabetical List Tree Diagram

ⓘ Howardite meteorite

Detailed Mineral List:

ⓘ Albite

Formula: Na(AlSi₃O₈)

References:

Jérome, D. Y. & Michel-Lévy, M. C. (1972) The Washougal Meteorite: Meteoritics 7 (4): 449-461. (Dec 1972)

ⓘ Albite var. Andesine

Formula: (Na,Ca)[Al(Si,Al)Si₂O₈]

References:

Jérome, D. Y. & Michel-Lévy, M. C. (1972) The Washougal Meteorite: Meteoritics 7 (4): 449-461. (Dec 1972)

ⓘ Anorthite

Formula: Ca(Al₂Si₂O₈)

References:

Jérome, D. Y. & Michel-Lévy, M. C. (1972) The Washougal Meteorite: Meteoritics 7 (4): 449-461. (Dec 1972)

ⓘ Anorthite var. Bytownite

Formula: (Ca,Na)[Al(Al,Si)Si₂O₈]

References:

Jérome, D. Y. & Michel-Lévy, M. C. (1972) The Washougal Meteorite: Meteoritics 7 (4): 449-461. (Dec 1972)

ⓘ Augite

Formula: (Ca_xMg_yFe_z)(Mg_y1Fe_z1)Si₂O₆

References:

Jérome, D. Y. & Michel-Lévy, M. C. (1972) The Washougal Meteorite: Meteoritics 7 (4): 449-461. (Dec 1972)

ⓘ Chromite

Formula: Fe²⁺Cr³⁺₂O₄

References:

Jérome, D. Y. & Michel-Lévy, M. C. (1972) The Washougal Meteorite: Meteoritics 7 (4): 449-461. (Dec 1972)

ⓘ Clinoenstatite

Formula: MgSiO₃

References:

Cannon, Bart (1975) Minerals of Washington. Cordilleran, Mercer Island, WA.p.85

ⓘ 'Clinopyroxene Subgroup'

References:

Jérome, D. Y. & Michel-Lévy, M. C. (1972) The Washougal Meteorite: Meteoritics 7 (4): 449-461. (Dec 1972)

ⓘ Enstatite

Formula: Mg₂Si₂O₆

References:

Jérome, D. Y. & Michel-Lévy, M. C. (1972) The Washougal Meteorite: Meteoritics 7 (4): 449-461. (Dec 1972)

Cannon, Bart (1975) Minerals of Washington. Cordilleran, Mercer Island, WA.p.85

ⓘ Enstatite var. Bronzite

Formula: (Mg,Fe²⁺)₂[SiO₃]₂

References:

Jérome, D. Y. & Michel-Lévy, M. C. (1972) The Washougal Meteorite: Meteoritics 7 (4): 449-461. (Dec 1972)

Cannon, Bart (1975) Minerals of Washington. Cordilleran, Mercer Island, WA.p.85

ⓘ 'Fayalite-Forsterite Series'

Description: Olivine in dunite clast & elsewhere; OLivine (Fa 12.6) is homogeneous in the large dunite xenolith

References:

articles.adsabs.harvard.edu (n.d.) http://articles.adsabs.harvard.edu/cgi-bin/nph-iarticle_query?1972Metic..7.449J&data_type=PDF_HIGH&type=PRINTER&filetype=.pdf

Jérome, D. Y. & Michel-Lévy, M. C. (1972) The Washougal Meteorite: Meteoritics 7 (4): 449-461. (Dec 1972)

Jérome, D. Y. & Michel-Lévy, M. C. (1973) The Washougal meteorite: Meteoritics 8 (1): p. 47. (March 1973).

ⓘ 'Hypersthene'

Formula: (Mg,Fe)SiO₃

Description: Hypersthene - As exsolved lamellae from Pigeonite

References:

articles.adsabs.harvard.edu (n.d.) http://articles.adsabs.harvard.edu/cgi-bin/nph-iarticle_query?1972Metic..7.449J&data_type=PDF_HIGH&type=PRINTER&filetype=.pdf

Jérome, D. Y. & Michel-Lévy, M. C. (1972) The Washougal Meteorite: Meteoritics 7 (4): 449-461. (Dec 1972)

ⓘ Ilmenite

Formula: Fe²⁺TiO₃

References:

Jérome, D. Y. & Michel-Lévy, M. C. (1972) The Washougal Meteorite: Meteoritics 7 (4): 449-461. (Dec 1972)

ⓘ Iron

Formula: Fe

References:

Jérome, D. Y. & Michel-Lévy, M. C. (1972) The Washougal Meteorite: Meteoritics 7 (4): 449-461. (Dec 1972)

ⓘ Iron var. Kamacite

Formula: (Fe,Ni)

References:

Jérome, D. Y. & Michel-Lévy, M. C. (1972) The Washougal Meteorite: Meteoritics 7 (4): 449-461. (Dec 1972)

ⓘ Pigeonite

Formula: (Ca_xMg_yFe_z)(Mg_y1Fe_z1)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.

References:

articles.adsabs.harvard.edu (n.d.) http://articles.adsabs.harvard.edu/cgi-bin/nph-iarticle_query?1972Metic..7.449J&data_type=PDF_HIGH&type=PRINTER&filetype=.pdf

Jérome, D. Y. & Michel-Lévy, M. C. (1972) The Washougal Meteorite: Meteoritics 7 (4): 449-461. (Dec 1972)

ⓘ Tridymite

Formula: SiO₂

Description: Minor in overall abundance, Tridymite is ubiquitous in small euhedral & anhedral eucritic clasts and debris-rich clasts

References:

articles.adsabs.harvard.edu (n.d.) http://articles.adsabs.harvard.edu/cgi-bin/nph-iarticle_query?1972Metic..7.449J&data_type=PDF_HIGH&type=PRINTER&filetype=.pdf

Jérome, D. Y. & Michel-Lévy, M. C. (1972) The Washougal Meteorite: Meteoritics 7 (4): 449-461. (Dec 1972)

ⓘ Troilite

Formula: FeS

Description: Troilite is apparently quite scarce, but is found as very small inclusions in pyroxene

References:

articles.adsabs.harvard.edu (n.d.) http://articles.adsabs.harvard.edu/cgi-bin/nph-iarticle_query?1972Metic..7.449J&data_type=PDF_HIGH&type=PRINTER&filetype=.pdf

Jérome, D. Y. & Michel-Lévy, M. C. (1972) The Washougal Meteorite: Meteoritics 7 (4): 449-461. (Dec 1972)

Gallery:

List of minerals arranged by Strunz 10th Edition classification

Group 1 - Elements
ⓘ	Iron	1.AE.05	Fe
ⓘ	var. Kamacite	1.AE.05	(Fe,Ni)
Group 2 - Sulphides and Sulfosalts
ⓘ	Troilite	2.CC.10	FeS
Group 4 - Oxides and Hydroxides
ⓘ	Chromite	4.BB.05	Fe²⁺Cr³⁺₂O₄
ⓘ	Ilmenite	4.CB.05	Fe²⁺TiO₃
ⓘ	Tridymite	4.DA.10	SiO₂
Group 9 - Silicates
ⓘ	Enstatite var. Bronzite	9.DA.05	(Mg,Fe²⁺)₂[SiO₃]₂
ⓘ		9.DA.05	Mg₂Si₂O₆
ⓘ	Clinoenstatite	9.DA.10	MgSiO₃
ⓘ	Pigeonite	9.DA.10	(Ca_xMg_yFe_z)(Mg_y1Fe_z1)Si₂O₆
ⓘ	Augite	9.DA.15	(Ca_xMg_yFe_z)(Mg_y1Fe_z1)Si₂O₆
ⓘ	Albite	9.FA.35	Na(AlSi₃O₈)
ⓘ	var. Andesine	9.FA.35	(Na,Ca)[Al(Si,Al)Si₂O₈]
ⓘ	Anorthite var. Bytownite	9.FA.35	(Ca,Na)[Al(Al,Si)Si₂O₈]
ⓘ		9.FA.35	Ca(Al₂Si₂O₈)
Unclassified
ⓘ	'Hypersthene'	-	(Mg,Fe)SiO₃
ⓘ	'Clinopyroxene Subgroup'	-
ⓘ	'Fayalite-Forsterite Series'	-
ⓘ	'Plagioclase'	-	(Na,Ca)[(Si,Al)AlSi₂]O₈

List of minerals for each chemical element

O	Oxygen
O	ⓘ Albite	Na(AlSi₃O₈)
O	ⓘ Albite var. Andesine	(Na,Ca)[Al(Si,Al)Si₂O₈]
O	ⓘ Anorthite	Ca(Al₂Si₂O₈)
O	ⓘ Augite	(Ca_xMg_yFe_z)(Mg_y1Fe_z1)Si₂O₆
O	ⓘ Anorthite var. Bytownite	(Ca,Na)[Al(Al,Si)Si₂O₈]
O	ⓘ Chromite	Fe²⁺Cr₂³⁺O₄
O	ⓘ Clinoenstatite	MgSiO₃
O	ⓘ Enstatite	Mg₂Si₂O₆
O	ⓘ Hypersthene	(Mg,Fe)SiO₃
O	ⓘ Ilmenite	Fe²⁺TiO₃
O	ⓘ Pigeonite	(Ca_xMg_yFe_z)(Mg_y1Fe_z1)Si₂O₆
O	ⓘ Tridymite	SiO₂
O	ⓘ Enstatite var. Bronzite	(Mg,Fe²⁺)₂[SiO₃]₂
O	ⓘ Plagioclase	(Na,Ca)[(Si,Al)AlSi₂]O₈
Na	Sodium
Na	ⓘ Albite	Na(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
Mg	Magnesium
Mg	ⓘ Augite	(Ca_xMg_yFe_z)(Mg_y1Fe_z1)Si₂O₆
Mg	ⓘ Clinoenstatite	MgSiO₃
Mg	ⓘ Enstatite	Mg₂Si₂O₆
Mg	ⓘ Hypersthene	(Mg,Fe)SiO₃
Mg	ⓘ Pigeonite	(Ca_xMg_yFe_z)(Mg_y1Fe_z1)Si₂O₆
Mg	ⓘ Enstatite var. Bronzite	(Mg,Fe²⁺)₂[SiO₃]₂
Al	Aluminium
Al	ⓘ Albite	Na(AlSi₃O₈)
Al	ⓘ Albite var. Andesine	(Na,Ca)[Al(Si,Al)Si₂O₈]
Al	ⓘ Anorthite	Ca(Al₂Si₂O₈)
Al	ⓘ Anorthite var. Bytownite	(Ca,Na)[Al(Al,Si)Si₂O₈]
Al	ⓘ Plagioclase	(Na,Ca)[(Si,Al)AlSi₂]O₈
Si	Silicon
Si	ⓘ Albite	Na(AlSi₃O₈)
Si	ⓘ Albite var. Andesine	(Na,Ca)[Al(Si,Al)Si₂O₈]
Si	ⓘ Anorthite	Ca(Al₂Si₂O₈)
Si	ⓘ Augite	(Ca_xMg_yFe_z)(Mg_y1Fe_z1)Si₂O₆
Si	ⓘ Anorthite var. Bytownite	(Ca,Na)[Al(Al,Si)Si₂O₈]
Si	ⓘ Clinoenstatite	MgSiO₃
Si	ⓘ Enstatite	Mg₂Si₂O₆
Si	ⓘ Hypersthene	(Mg,Fe)SiO₃
Si	ⓘ Pigeonite	(Ca_xMg_yFe_z)(Mg_y1Fe_z1)Si₂O₆
Si	ⓘ Tridymite	SiO₂
Si	ⓘ Enstatite var. Bronzite	(Mg,Fe²⁺)₂[SiO₃]₂
Si	ⓘ Plagioclase	(Na,Ca)[(Si,Al)AlSi₂]O₈
S	Sulfur
S	ⓘ Troilite	FeS
Ca	Calcium
Ca	ⓘ Albite var. Andesine	(Na,Ca)[Al(Si,Al)Si₂O₈]
Ca	ⓘ Anorthite	Ca(Al₂Si₂O₈)
Ca	ⓘ Augite	(Ca_xMg_yFe_z)(Mg_y1Fe_z1)Si₂O₆
Ca	ⓘ Anorthite var. Bytownite	(Ca,Na)[Al(Al,Si)Si₂O₈]
Ca	ⓘ Pigeonite	(Ca_xMg_yFe_z)(Mg_y1Fe_z1)Si₂O₆
Ca	ⓘ Plagioclase	(Na,Ca)[(Si,Al)AlSi₂]O₈
Ti	Titanium
Ti	ⓘ Ilmenite	Fe²⁺TiO₃
Cr	Chromium
Cr	ⓘ Chromite	Fe²⁺Cr₂³⁺O₄
Fe	Iron
Fe	ⓘ Augite	(Ca_xMg_yFe_z)(Mg_y1Fe_z1)Si₂O₆
Fe	ⓘ Chromite	Fe²⁺Cr₂³⁺O₄
Fe	ⓘ Hypersthene	(Mg,Fe)SiO₃
Fe	ⓘ Ilmenite	Fe²⁺TiO₃
Fe	ⓘ Iron	Fe
Fe	ⓘ Iron var. Kamacite	(Fe,Ni)
Fe	ⓘ Pigeonite	(Ca_xMg_yFe_z)(Mg_y1Fe_z1)Si₂O₆
Fe	ⓘ Troilite	FeS
Fe	ⓘ Enstatite var. Bronzite	(Mg,Fe²⁺)₂[SiO₃]₂
Ni	Nickel
Ni	ⓘ Iron var. Kamacite	(Fe,Ni)

Other Regions, Features and Areas containing this locality

North America

Cascade RangeMountain Range

North America PlateTectonic Plate

Siletzia DomainDomain
Western Washington–Oregon BasinsBasin

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References

(n.d.)

www.lpi.usra.edu (n.d.) http://www.lpi.usra.edu/meteor/get_original_photo.php?recno=5632324

articles.adsabs.harvard.edu (n.d.) http://articles.adsabs.harvard.edu/cgi-bin/nph-iarticle_query?1972Metic..7.449J&data_type=PDF_HIGH&type=PRINTER&filetype=.pdf

Nininger, H. H. (1939) Note on the Washougal, Washington, Aërolite. Popular Astronomy, vol. 47: 503-504.

Jérome, D. Y. & Michel-Lévy, M. C. (1972) The Washougal Meteorite: Meteoritics 7 (4): 449-461. (Dec 1972).

Jérome, D. Y. & Michel-Lévy, M. C. (1973) The Washougal meteorite: Meteoritics 8 (1): p. 47. (March 1973).

Desnoyers, C. & Jerome, D.Y. (1973) Olivine Compositions in Howardites and other achondritic meteorite (abstract): Meteoritics 8 (4): 344-345. (Dec 1973)

Carver, E. A. & Anders, E. (1976) Fission-track ages of four meteorites: Geochimica et Cosmochimica Acta, vol. 40: 467-477. (Apr. 1976)

Mason B., Jarosewich E. & Nelen J. A. (1979) The pyroxene-plagioclase achondrites. Smithson. Contrib. Earth Sci. 22: 27-45.

Grady, M. M. (2000). Catalogue of Meteorites (5/e). Cambridge University Press: Cambridge, New York, Oakleigh, Madrid, Cape Town. 690 pages.

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Detailed Mineral List:

Gallery:

List of minerals arranged by Strunz 10th Edition classification

List of minerals for each chemical element

Other Regions, Features and Areas containing this locality

References

Washougal meteorite, Washougal, Clark County, Washington, USA i
Regional Level Types
Washougal meteorite Meteorite Fall Location
Washougal - not defined -
Clark County County
Washington State
USA Country