Ordinary chondrite, blackened (H5)
Find, pre-1915; 54.9 kg

The Rosebud meteorite was recovered as a conical-shaped mass. ~10 km south of Rosebud in neighboring Milam County. It had been known for at least several years before 1915 when it was presented to the University of Texas. Its original mass was 54.9 kg. Olivine (> 50 vol%) is dominant — in chondrules as both euhedral and fragmented crystals and also in matrix. Orthopyroxene and lesser amounts of maskelynite are also present. Chondrules are texturally diverse. Fe-Ni metal is concentrated within the matrix, but much of the metal (esp. kamacite) has weathered away. Troilite, also partially weathered away, is irregularly scattered thruout the meteorite. Small amounts of accessory chromite in small grains are present. Hydrous iron oxides are present as reddish stains and are concentrated along veins & cracks.

The main mass is with the University of Texas at Austin.

Synonym: 'Glen Rose (stone).'

Select Mineral List Type

Standard Detailed Gallery Strunz Chemical Elements

Mineral List

ⓘ Chromite

ⓘ 'Fayalite-Forsterite Series'

ⓘ 'Orthopyroxene Subgroup'

ⓘ 'Plagioclase'

ⓘ Taenite

ⓘ Troilite

5 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

ⓘ H5 chondrite meteorite

Detailed Mineral List:

ⓘ Chromite

Formula: Fe²⁺Cr³⁺₂O₄

References:

Bullard, F.M. (1939) The Rosebud meteorite, Milam county, Texas: American Mineralogist 24(4): 242-254. (April 1939).

Ramdohr, Paul (1972) The Opaque Minerals in Stony Meteorites. De Gruyter. doi:10.1515/9783112651025

ⓘ 'Fayalite-Forsterite Series'

Description: Olivine composition (Fa19), Mason,1963.

References:

Bullard, F.M. (1939) The Rosebud meteorite, Milam county, Texas: American Mineralogist 24(4): 242-254. (April 1939).

Mason, Brian (1963) Olivine composition in chondrites. Geochimica et Cosmochimica Acta, 27 (10) 1011-1023 doi:10.1016/0016-7037(63)90062-0

Ehlmann, A.J. & Keil, K. (1987) Classification of a second group of ordinary chondrites from Texas: Meteoritics 22 (1): 17-23. (March 1987).

ⓘ Ilmenite

Formula: Fe²⁺TiO₃

References:

Ramdohr, Paul (1972) The Opaque Minerals in Stony Meteorites. De Gruyter. doi:10.1515/9783112651025

ⓘ 'Limonite'

Description: Hydrous iron oxides are present as reddish stains and are concentrated along veins & cracks.

References:

Bullard, F.M. (1939) The Rosebud meteorite, Milam county, Texas: American Mineralogist 24(4): 242-254. (April 1939).

Ramdohr, Paul (1972) The Opaque Minerals in Stony Meteorites. De Gruyter. doi:10.1515/9783112651025

Ehlmann, A.J. & Keil, K. (1987) Classification of a second group of ordinary chondrites from Texas: Meteoritics 22 (1): 17-23. (March 1987).

ⓘ 'Maskelynite'

Description: Most or all of the glass is of feldspathic composition.

References:

Bullard, F.M. (1939) The Rosebud meteorite, Milam county, Texas: American Mineralogist 24(4): 242-254. (April 1939).

ⓘ Native Iron

Formula: Fe

References:

Ramdohr, Paul (1972) The Opaque Minerals in Stony Meteorites. De Gruyter. doi:10.1515/9783112651025

ⓘ Native Iron var. Kamacite

Formula: (Fe,Ni)

References:

Ramdohr, Paul (1972) The Opaque Minerals in Stony Meteorites. De Gruyter. doi:10.1515/9783112651025

ⓘ 'Orthopyroxene Subgroup'

Description: Original classification label, Olivine-bronzite chondrite.

References:

Bullard, F.M. (1939) The Rosebud meteorite, Milam county, Texas: American Mineralogist 24(4): 242-254. (April 1939).

Graham, A. L., Bevan, A. W. R., Hutchison, R. (1985) Catalogue of Meteorites - With Special Reference to those Represented in the Collection of the British Museum (Natural History) (4th ed.) British Museum (Natural History), London.

ⓘ 'Plagioclase'

Formula: (Na,Ca)[(Si,Al)AlSi₂]O₈

Description: Plagioclase (of oligoclase composition) present in small grains.

References:

Ehlmann, A.J. & Keil, K. (1987) Classification of a second group of ordinary chondrites from Texas: Meteoritics 22 (1): 17-23. (March 1987).

ⓘ Taenite

Formula: (Fe,Ni)

References:

Ramdohr, Paul (1972) The Opaque Minerals in Stony Meteorites. De Gruyter. doi:10.1515/9783112651025

ⓘ Troilite

Formula: FeS

References:

Bullard, F.M. (1939) The Rosebud meteorite, Milam county, Texas: American Mineralogist 24(4): 242-254. (April 1939).

Ramdohr, Paul (1972) The Opaque Minerals in Stony Meteorites. De Gruyter. doi:10.1515/9783112651025

Ehlmann, A.J. & Keil, K. (1987) Classification of a second group of ordinary chondrites from Texas: Meteoritics 22 (1): 17-23. (March 1987).

Gallery:

List of minerals arranged by Strunz 10th Edition classification

Group 1 - Elements
ⓘ	Native Iron	1.AE.05	Fe
ⓘ	var. Kamacite	1.AE.05	(Fe,Ni)
ⓘ	Taenite	1.AE.10	(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
Unclassified
ⓘ	'Limonite'	-
ⓘ	'Maskelynite'	-
ⓘ	'Fayalite-Forsterite Series'	-
ⓘ	'Plagioclase'	-	(Na,Ca)[(Si,Al)AlSi₂]O₈
ⓘ	'Orthopyroxene Subgroup'	-

List of minerals for each chemical element

O	Oxygen
O	ⓘ Chromite	Fe²⁺Cr₂³⁺O₄
O	ⓘ Ilmenite	Fe²⁺TiO₃
O	ⓘ Fayalite-Forsterite Series
O	ⓘ Plagioclase	(Na,Ca)[(Si,Al)AlSi₂]O₈
Na	Sodium
Na	ⓘ Plagioclase	(Na,Ca)[(Si,Al)AlSi₂]O₈
Mg	Magnesium
Mg	ⓘ Fayalite-Forsterite Series
Al	Aluminium
Al	ⓘ Plagioclase	(Na,Ca)[(Si,Al)AlSi₂]O₈
Si	Silicon
Si	ⓘ Fayalite-Forsterite Series
Si	ⓘ Plagioclase	(Na,Ca)[(Si,Al)AlSi₂]O₈
S	Sulfur
S	ⓘ Troilite	FeS
Ca	Calcium
Ca	ⓘ Plagioclase	(Na,Ca)[(Si,Al)AlSi₂]O₈
Ti	Titanium
Ti	ⓘ Ilmenite	Fe²⁺TiO₃
Cr	Chromium
Cr	ⓘ Chromite	Fe²⁺Cr₂³⁺O₄
Fe	Iron
Fe	ⓘ Chromite	Fe²⁺Cr₂³⁺O₄
Fe	ⓘ Ilmenite	Fe²⁺TiO₃
Fe	ⓘ Native Iron	Fe
Fe	ⓘ Native Iron var. Kamacite	(Fe,Ni)
Fe	ⓘ Taenite	(Fe,Ni)
Fe	ⓘ Troilite	FeS
Fe	ⓘ Fayalite-Forsterite Series
Ni	Nickel
Ni	ⓘ Native Iron var. Kamacite	(Fe,Ni)
Ni	ⓘ Taenite	(Fe,Ni)

Other Regions, Features and Areas containing this locality

North AmericaContinent

North America PlateTectonic Plate

Fort Worth BasinBasin
Granite-Rhyolite ProvinceMagmatic Province
Gulf of Mexico BasinBasin
Sabine DomainDomain

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References

www.lpi.usra.edu (n.d.) http://www.lpi.usra.edu/meteor/metbull.php?code=22767

www.lpi.usra.edu (n.d.) http://www.lpi.usra.edu/meteor/get_original_photo.php?recno=5631640-Rosebud

Bullard, F.M. (1939) The Rosebud meteorite, Milam county, Texas: American Mineralogist 24(4): 242-254. (April 1939).

Mason, Brian (1963) Olivine composition in chondrites. Geochimica et Cosmochimica Acta, 27 (10) 1011-1023 doi:10.1016/0016-7037(63)90062-0

Ramdohr, Paul (1972) The Opaque Minerals in Stony Meteorites. De Gruyter. doi:10.1515/9783112651025

Ehlmann, A.J. & Keil, K. (1987) Classification of a second group of ordinary chondrites from Texas: Meteoritics 22 (1): 17-23. (March 1987).

Grady, Monica (2000) Catalogue of Meteorites (5th ed.). Cambridge University Press.

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Rosebud meteorite, Milam County, Texas, USAiRegional Level TypesRosebud meteoriteMeteorite Fall Location Milam CountyCounty TexasState USACountry function showexplain() { $("#locexplain").toggle(); if (typeof movemap === "function") movemap(); }

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Mineral List

Meteorite/Rock Types Recorded

Select Rock List Type

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

Rosebud meteorite, Milam County, Texas, USA i
Regional Level Types
Rosebud meteorite Meteorite Fall Location
Milam County County
Texas State
USA Country