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Colby (Wisconsin) meteorite, Clark County, Wisconsin, USAi
Regional Level Types
Colby (Wisconsin) meteoriteMeteorite Fall Location
Clark CountyCounty
WisconsinState
USACountry

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Latitude & Longitude (WGS84):
44° 53' 60'' North , 90° 16' 60'' West
Latitude & Longitude (decimal):
44.90000,-90.28333
GeoHash:
G#: 9zzz3tc9m
GRN:
N30W47
Type:
Meteorite Fall Location
Meteorite Class:
L6 chondrite meteorite
Meteoritical Society Class:
L6
Metbull:
View entry in Meteoritical Bulletin Database
Köppen climate type:
Dfb : Warm-summer humid continental climate
Nearest Settlements:
PlacePopulationDistance
Colby1,828 (2017)2.8km
Abbotsford2,264 (2017)5.8km
Unity342 (2017)6.0km
Dorchester862 (2017)12.2km
Curtiss215 (2017)13.4km
Nearest Clubs:
Local clubs are the best way to get access to collecting localities
ClubLocationDistance
Heart of Wisconsin Gem & Mineral SocietyMarshfield & Stevens Point, Wisconsin27km
Mindat Locality ID:
269033
Long-form identifier:
mindat:1:2:269033:2
GUID (UUID V4):
0


Ordinary chondrite, veined (L6; S3)
Fell, 4 July 1917; 104.5 kg

After a bright bolide was seen, loud detonations were heard, and two stones fell about a km apart. The meteorite is rich in silicates (~90 vol%) with olivine and orthopyroxene most prominent. Significant pre-terrestrial shock has converted much of the plagioclase into maskelynite and created Neumann bands within the kamacite. Iron abundance (24.38% total iron) and olivine composition (Fa25) are characteristic of the L chondrite geochemical group. Opaques have been studied in detail, but except for troilite and Fe-Ni metal are quite minor in their overall volume.

Colby (Wisconsin) is one of 269 meteorite falls classified exactly as an L6 chondrite at The Meteoritical Bulletin Database (as of early January 2016). The L chondrites (relatively low iron) are the most numerous group of ordinary chondrites and the L6 petrologic type is the most abundant petrologic type. The main mass has been kept at the Milwaukee Museum.

What's in a name? The proper and unique name for the meteorite is the Colby (Wisconsin) meteorite. The Colby (Kansas) meteorite is an H5 chondrite found in Kansas in 1940.

Select Mineral List Type

Standard Detailed Gallery Strunz Chemical Elements

Mineral List


9 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

Detailed Mineral List:

ⓘ 'Apatite'
Formula: Ca5(PO4)3(Cl/F/OH)
ⓘ Chromite
Formula: Fe2+Cr3+2O4
ⓘ 'Fayalite-Forsterite Series'
Description: Composition of Olivine (Fa25).
ⓘ Isocubanite
Formula: CuFe2S3
ⓘ Mackinawite
Formula: FeS
ⓘ 'Maskelynite'
ⓘ Merrillite
Formula: Ca9NaMg(PO4)7
ⓘ Native Copper
Formula: Cu
ⓘ Native Iron
Formula: Fe
ⓘ Native Iron var. Kamacite
Formula: (Fe,Ni)
ⓘ 'Orthopyroxene Subgroup'
ⓘ 'Plessite'
ⓘ Taenite
Formula: (Fe,Ni)
ⓘ Tetrataenite
Formula: FeNi
ⓘ Troilite
Formula: FeS

Gallery:

List of minerals arranged by Strunz 10th Edition classification

Group 1 - Elements
ⓘNative Copper1.AA.05Cu
ⓘNative Iron1.AE.05Fe
ⓘvar. Kamacite1.AE.05(Fe,Ni)
ⓘTaenite1.AE.10(Fe,Ni)
ⓘTetrataenite1.AE.10FeNi
Group 2 - Sulphides and Sulfosalts
ⓘIsocubanite2.CB.55bCuFe2S3
ⓘTroilite2.CC.10FeS
ⓘMackinawite2.CC.25FeS
Group 4 - Oxides and Hydroxides
ⓘChromite4.BB.05Fe2+Cr3+2O4
Group 8 - Phosphates, Arsenates and Vanadates
ⓘMerrillite8.AC.45Ca9NaMg(PO4)7
Unclassified
ⓘ'Maskelynite'-
ⓘ'Fayalite-Forsterite Series'-
ⓘ'Plessite'-
ⓘ'Orthopyroxene Subgroup'-
ⓘ'Apatite'-Ca5(PO4)3(Cl/F/OH)

List of minerals for each chemical element

HHydrogen
Hⓘ ApatiteCa5(PO4)3(Cl/F/OH)
OOxygen
Oⓘ ChromiteFe2+Cr23+O4
Oⓘ MerrilliteCa9NaMg(PO4)7
Oⓘ Fayalite-Forsterite Series
Oⓘ ApatiteCa5(PO4)3(Cl/F/OH)
FFluorine
Fⓘ ApatiteCa5(PO4)3(Cl/F/OH)
NaSodium
Naⓘ MerrilliteCa9NaMg(PO4)7
MgMagnesium
Mgⓘ MerrilliteCa9NaMg(PO4)7
Mgⓘ Fayalite-Forsterite Series
SiSilicon
Siⓘ Fayalite-Forsterite Series
PPhosphorus
Pⓘ MerrilliteCa9NaMg(PO4)7
Pⓘ ApatiteCa5(PO4)3(Cl/F/OH)
SSulfur
Sⓘ IsocubaniteCuFe2S3
Sⓘ MackinawiteFeS
Sⓘ TroiliteFeS
ClChlorine
Clⓘ ApatiteCa5(PO4)3(Cl/F/OH)
CaCalcium
Caⓘ MerrilliteCa9NaMg(PO4)7
Caⓘ ApatiteCa5(PO4)3(Cl/F/OH)
CrChromium
Crⓘ ChromiteFe2+Cr23+O4
FeIron
Feⓘ ChromiteFe2+Cr23+O4
Feⓘ Native IronFe
Feⓘ IsocubaniteCuFe2S3
Feⓘ Native Iron var. Kamacite(Fe,Ni)
Feⓘ MackinawiteFeS
Feⓘ Taenite(Fe,Ni)
Feⓘ TetrataeniteFeNi
Feⓘ TroiliteFeS
Feⓘ Fayalite-Forsterite Series
NiNickel
Niⓘ Native Iron var. Kamacite(Fe,Ni)
Niⓘ Taenite(Fe,Ni)
Niⓘ TetrataeniteFeNi
CuCopper
Cuⓘ Native CopperCu
Cuⓘ IsocubaniteCuFe2S3

Other Regions, Features and Areas containing this locality

North AmericaContinent
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.

References

www.lpi.usra.edu (n.d.) http://www.lpi.usra.edu/meteor/metbull.php?code=5395
Koep, J. (1917) Meteor falls at Colby and Cornell Wisconsin. Popular Astronomy 25: 479-480.
(1917)
Merrill, G.P. (1925) Notes on the Meteoric Stone of Colby, Wisconsin. Proceedings of the United States National Museum Vol. 67, Article 2, pp. 1-3. US Government Printing Office: Washington, DC
(1925)
Mason, Brian (1963) Olivine composition in chondrites. Geochimica et Cosmochimica Acta, 27 (10) 1011-1023 doi:10.1016/0016-7037(63)90062-0
Keil, K. & Fredriksson, K. (1964) The Fe.Mg and Ca Distribution in Coexisting Olivines and Rhombic Pyroxenes of Chondrites. Journal of Geophysical Research Atmospheres 69 (16): 3487-3515. (August 1964)
Ramdohr, Paul (1972) The Opaque Minerals in Stony Meteorites. De Gruyter. doi:10.1515/9783112651025
Willis, J. & Goldstein, J. I. (1983) A three-dimensional study of metal grains in equilibrated, ordinary chondrites. Journal of Geophysical Research, Supplement, vol. 88: B287-B292. (Nov. 1983).
(1983)
Crozaz G. & Zinner, E. (1985) Ion probe determinations of rare earths in individual meteoritic phosphate grains: Earth and Planetary Science Letters 73: 41-52.
Grady, Monica (2000) Catalogue of Meteorites (5th ed.). Cambridge University Press.
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