Boerne meteorite, Kendall Co., Texas, USAi
| Regional Level Types | |
|---|---|
| Boerne meteorite | Meteorite Fall Location |
| Kendall Co. | County |
| Texas | State |
| USA | Country |
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Latitude & Longitude (WGS84):
29° 48' North , 98° 48' West
Latitude & Longitude (decimal):
Locality type:
Meteorite Class:
Meteoritical Society Class:
Köppen climate type:
Nearest Settlements:
| Place | Population | Distance |
|---|---|---|
| Boerne | 13,674 (2017) | 6.6km |
| Scenic Oaks | 4,957 (2011) | 15.5km |
| Fair Oaks Ranch | 7,407 (2017) | 16.3km |
| Comfort | 2,363 (2011) | 21.2km |
| Cross Mountain | 3,124 (2011) | 21.9km |
Ordinary chondrite (H6)
Find,1932; 1.1 kg
A weathered meteoritic stone was recovered. A visual inspection reveals pervasive staining, clasts [sometimes large], and bright Fe-Ni metal aggregates. Olivine composition [Fa20], orthopyroxene ['bronzite' variety] and equilibrated textures are characteristic of the the H6 (relatively low iron) ordinary chondrite geochemical group. Plagioclase is largely interstitial. While Ramdohr (1973) found primary kamacite, taenite, chromite and schreibersite in his study of opaque minerals, he also found pervasive weathering as well. Thus, chondritic magnetite is primary (preterrestrial) in a number of ordinary chondrites, but the magnetite reported here is a terrestrial weatherate. The pervasive weathering may account for the fact that Boerne has not appeared in many meteoritic studies.
H chondrites represent ~ 45% of all well classified ordinary chondrites with the H6 petrologic type accounting for approximately one quarter of the group. The main mass [~400 g] has been at U.S. National Museum (Washington) with smaller masses at the TCU/Monnig Collection and at Arizona State University [45.9 g in 2016].
Select Mineral List Type
Standard Detailed Gallery Strunz Chemical ElementsMineral List
7 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 DiagramDetailed Mineral List:
| ⓘ Chromite Formula: Fe2+Cr3+2O4 Reference: Ramdohr, P. (1973). The Opaque Minerals in Stony Meteorites. Elsevier Publishing Company: Amsterdam; London: New York. 245 pages. |
| ⓘ 'Fayalite-Forsterite Series' Description: Olivine composition [Fa20] in Mason, 1963. Reference: Mason, B. (1963) Olivine Composition in Chondrites: Geochimica et Cosmochimica Acta 27(9): 1011-1023. (Sept 1963).; Ramdohr, P. (1973). The Opaque Minerals in Stony Meteorites. Elsevier Publishing Company: Amsterdam; London: New York. 245 pages.; Graham, A.L., Bevan, A.W.R. & Hutchison, B. (1985) Catalogue of Meteorites (4/e). University of Arizona Press: Tucson. |
| ⓘ Ilmenite Formula: Fe2+TiO3 Reference: Ramdohr, P. (1973). The Opaque Minerals in Stony Meteorites. Elsevier Publishing Company: Amsterdam; London: New York. 245 pages. |
| ⓘ Iron Formula: Fe Reference: Ramdohr, P. (1973). The Opaque Minerals in Stony Meteorites. Elsevier Publishing Company: Amsterdam; London: New York. 245 pages. |
| ⓘ Iron var. Kamacite Formula: (Fe,Ni) Reference: Ramdohr, P. (1973). The Opaque Minerals in Stony Meteorites. Elsevier Publishing Company: Amsterdam; London: New York. 245 pages. |
| ⓘ 'Limonite' Description: Limonite in fractures. Reference: Ramdohr, P. (1973). The Opaque Minerals in Stony Meteorites. Elsevier Publishing Company: Amsterdam; London: New York. 245 pages. |
| ⓘ Magnetite Formula: Fe2+Fe3+2O4 Description: Magnetite (terrestrial weatherate) — Observed by Ramdohr (1973) Reference: Ramdohr, P. (1973). The Opaque Minerals in Stony Meteorites. Elsevier Publishing Company: Amsterdam; London: New York. 245 pages. |
| ⓘ 'Orthopyroxene Subgroup' Description: Classification as a 'Olivine-bronzite' chondrite. Reference: Graham, A.L., Bevan, A.W.R. & Hutchison, B. (1985) Catalogue of Meteorites (4/e). University of Arizona Press: Tucson. |
| ⓘ 'Plagioclase' Formula: (Na,Ca)[(Si,Al)AlSi2]O8 Reference: Ramdohr, P. (1973). The Opaque Minerals in Stony Meteorites. Elsevier Publishing Company: Amsterdam; London: New York. 245 pages. |
| ⓘ Schreibersite Formula: (Fe,Ni)3P Reference: Ramdohr, P. (1973). The Opaque Minerals in Stony Meteorites. Elsevier Publishing Company: Amsterdam; London: New York. 245 pages. |
| ⓘ Taenite Formula: (Fe,Ni) Reference: Ramdohr, P. (1973). The Opaque Minerals in Stony Meteorites. Elsevier Publishing Company: Amsterdam; London: New York. 245 pages. |
| ⓘ Troilite Formula: FeS Reference: Ramdohr, P. (1973). The Opaque Minerals in Stony Meteorites. Elsevier Publishing Company: Amsterdam; London: New York. 245 pages. |
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) |
| ⓘ | Schreibersite | 1.BD.05 | (Fe,Ni)3P |
| ⓘ | 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 |
| ⓘ | Magnetite | 4.BB.05 | Fe2+Fe3+2O4 |
| Unclassified Minerals, Rocks, etc. | |||
| ⓘ | 'Fayalite-Forsterite Series' | - | |
| ⓘ | 'Limonite' | - | |
| ⓘ | 'Orthopyroxene Subgroup' | - | |
| ⓘ | 'Plagioclase' | - | (Na,Ca)[(Si,Al)AlSi2]O8 |
List of minerals for each chemical element
| O | Oxygen | |
|---|---|---|
| O | ⓘ Chromite | Fe2+Cr23+O4 |
| O | ⓘ Ilmenite | Fe2+TiO3 |
| O | ⓘ Magnetite | Fe2+Fe23+O4 |
| O | ⓘ Plagioclase | (Na,Ca)[(Si,Al)AlSi2]O8 |
| Na | Sodium | |
| Na | ⓘ Plagioclase | (Na,Ca)[(Si,Al)AlSi2]O8 |
| Al | Aluminium | |
| Al | ⓘ Plagioclase | (Na,Ca)[(Si,Al)AlSi2]O8 |
| Si | Silicon | |
| Si | ⓘ Plagioclase | (Na,Ca)[(Si,Al)AlSi2]O8 |
| P | Phosphorus | |
| P | ⓘ Schreibersite | (Fe,Ni)3P |
| 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 | ⓘ Iron var. Kamacite | (Fe,Ni) |
| Fe | ⓘ Magnetite | Fe2+Fe23+O4 |
| Fe | ⓘ Schreibersite | (Fe,Ni)3P |
| Fe | ⓘ Taenite | (Fe,Ni) |
| Fe | ⓘ Troilite | FeS |
| Fe | ⓘ Iron | Fe |
| Ni | Nickel | |
| Ni | ⓘ Iron var. Kamacite | (Fe,Ni) |
| Ni | ⓘ Schreibersite | (Fe,Ni)3P |
| Ni | ⓘ Taenite | (Fe,Ni) |
References
Sort by
Year (asc) Year (desc) Author (A-Z) Author (Z-A)Leonard, F. C. & Nininger, A.D. (1937) Meteors and Meteorites: Meteorite discoveries reported to the Society for Research on Meteorites from August, 1933, to June, 1937 : Popular Astronomy 45: 449-451.
Mason, B. (1963) Olivine Composition in Chondrites: Geochimica et Cosmochimica Acta 27(9): 1011-1023. (Sept 1963).
Ramdohr, P. (1973). The Opaque Minerals in Stony Meteorites. Elsevier Publishing Company: Amsterdam; London: New York. 245 pages.
Graham, A.L., Bevan, A.W.R. & Hutchison, B. (1985) Catalogue of Meteorites (4/e). University of Arizona Press: Tucson.
External Links
http://www.lpi.usra.edu/meteor/metbull.php?code=5095 -Boerne@MetBullDatabase
https://www.lpi.usra.edu/meteor/get_original_photo.php?recno=5628256 -Boerne specimen [section]
https://www.lpi.usra.edu/meteor/get_original_photo.php?recno=5628256 -Boerne specimen [section]
Other Regions, Features and Areas containing this locality
North America PlateTectonic Plate
- Kerr BasinBasin
- Shawnee DomainDomain
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