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Kenton County meteorite, Kenton Co., Kentucky, USA

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Latitude & Longitude (WGS84): 38° 49' North , 84° 36' West
Latitude & Longitude (decimal): 38.81667,-84.60000
GeoHash:G#: dnguffk5m
Locality type:Meteorite Fall Location
Meteorite Class:IIIAB iron meteorite
Meteoritical Society Class:Iron, IIIAB
Metbull:View entry in Meteoritical Bulletin Database
Köppen climate type:Cfa : Humid subtropical climate


Iron meteorite, octahedrite (IIIAB, Om)
Found 1889, 163 kg.

A mass of 163 kg was found in 1889 by G .W. Cornelius on his farm, located about 13 km south of Independence. The mass was about 1 m below the surface and interlocked in the roots of an ash tree. An additional piece discovered in 1892 in nearby Grant County was identified as a companion piece several decades later. Buchwald (1975) provided a detailed look at the Fe-Ni metal assemblage of kamacite, taenite, and plessite [7.45% Ni; .48% Co] as well as the associated sulfides, phosphides, and nitrides. Indeed, the carlsbergite (CrN) was one of the first instances of a nitride recovered in any iron meteorite. The pentlandite and limonite are products of terrestrial weathering and alterations.

Kenton County is the most massive of the 25 recovered Kentucky meteorites and is one of the 6 IIIAB irons recovered there.

Select Mineral List Type

Standard Detailed Strunz Dana Chemical Elements

Mineral List


9 valid minerals.

Meteorite/Rock Types Recorded

Note: this is a very new system on mindat.org and 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:

Carlsbergite
Formula: CrN
Reference: Zapiski Vseross. Mineral. Obshch. (1999) 128/3, 64-72 (in russian)
Daubréelite
Formula: Fe2+Cr3+2S4
Description: Parallel daubréelite lamellae occupy 10-20% of troilite volume.
Reference: Buchwald, V. F. (1975) Handbook of Iron Meteorites. University of California Press. 3 volumes, 1418 pages.
Graphite
Formula: C
Reference: Buchwald, V. F. (1975) Handbook of Iron Meteorites. University of California Press. 1418 pages.; http://evols.library.manoa.hawaii.edu/bitstream/handle/10524/35874/vol3-Ri-Ro(LO).pdf#page=14
'IIIAB iron meteorite'
Reference: Meteoritical Society Database
Iron
Formula: Fe
Reference: Zapiski Vseross. Mineral. Obshch. (1999) 128/3, 64-72 (in russian); Buchwald, V. F. (1975) Handbook of Iron Meteorites. University of California Press. 3 volumes, 1418 pages.
Iron var: Kamacite
Formula: (Fe,Ni)
Reference: Zapiski Vseross. Mineral. Obshch. (1999) 128/3, 64-72 (in russian); Buchwald, V. F. (1975) Handbook of Iron Meteorites. University of California Press. 3 volumes, 1418 pages.
'Limonite'
Formula: (Fe,O,OH,H2O)
Reference: Buchwald, V. F. (1975) Handbook of Iron Meteorites. University of California Press. 1418 pages.; http://evols.library.manoa.hawaii.edu/bitstream/handle/10524/35874/vol3-Ri-Ro(LO).pdf#page=14
Nickelphosphide
Formula: (Ni,Fe)3P
Reference: Zapiski Vseross. Mineral. Obshch. (1999) 128/3, 64-72 (in russian)
Pentlandite
Formula: (FexNiy)Σ9S8
Description: Some troilite has been converted to Pentlandite.
Reference: Buchwald, V. F. (1975) Handbook of Iron Meteorites. University of California Press. 3 volumes, 1418 pages.
'Plessite'
Reference: Buchwald, V. F. (1975) Handbook of Iron Meteorites. University of California Press. 3 volumes, 1418 pages.
Schreibersite
Formula: (Fe,Ni)3P
Description: As scattered boundary precipitates & vermicular pseudomorphs after taenite.
Reference: Buchwald, V. F. (1975) Handbook of Iron Meteorites. University of California Press. 3 volumes, 1418 pages.
Taenite
Formula: (Fe,Ni)
Reference: Buchwald, V. F. (1975) Handbook of Iron Meteorites. University of California Press. 3 volumes, 1418 pages.
Troilite
Formula: FeS
Description: Troilite nodules - often with swathing kamacite - are conspicuous.
Reference: Buchwald, V. F. (1975) Handbook of Iron Meteorites. University of California Press. 3 volumes, 1418 pages.

List of minerals arranged by Strunz 10th Edition classification

Group 1 - Elements
'Carlsbergite'1.BC.15CrN
'Graphite'1.CB.05aC
'Iron'1.AE.05Fe
var: Kamacite1.AE.05(Fe,Ni)
Nickelphosphide1.BD.05(Ni,Fe)3P
Schreibersite1.BD.05(Fe,Ni)3P
Taenite1.AE.10(Fe,Ni)
Group 2 - Sulphides and Sulfosalts
'Daubréelite'2.DA.05Fe2+Cr3+2S4
Pentlandite2.BB.15(FexNiy)Σ9S8
Troilite2.CC.10FeS
Unclassified Minerals, Rocks, etc.
'IIIAB iron meteorite'-
Limonite-(Fe,O,OH,H2O)
Plessite-

List of minerals arranged by Dana 8th Edition classification

Group 1 - NATIVE ELEMENTS AND ALLOYS
Metals, other than the Platinum Group
Carlsbergite1.1.20.1CrN
Iron
var: Kamacite
1.1.11.1(Fe,Ni)
Schreibersite1.1.21.2(Fe,Ni)3P
Taenite1.1.11.2(Fe,Ni)
Semi-metals and non-metals
Graphite1.3.6.2C
Group 2 - SULFIDES
AmBnXp, with (m+n):p = 9:8
Pentlandite2.7.1.1(FexNiy)Σ9S8
AmXp, with m:p = 1:1
Troilite2.8.9.1FeS
AmBnXp, with (m+n):p = 3:4
Daubréelite2.10.1.11Fe2+Cr3+2S4
Unclassified Minerals, Rocks, etc.
'IIIAB iron meteorite'-
Iron-Fe
'Limonite'-(Fe,O,OH,H2O)
Nickelphosphide-(Ni,Fe)3P
'Plessite'-

List of minerals for each chemical element

HHydrogen
H Limonite(Fe,O,OH,H2O)
CCarbon
C GraphiteC
NNitrogen
N CarlsbergiteCrN
OOxygen
O Limonite(Fe,O,OH,H2O)
PPhosphorus
P Nickelphosphide(Ni,Fe)3P
P Schreibersite(Fe,Ni)3P
SSulfur
S DaubréeliteFe2+Cr23+S4
S Pentlandite(FexNiy)Σ9S8
S TroiliteFeS
CrChromium
Cr CarlsbergiteCrN
Cr DaubréeliteFe2+Cr23+S4
FeIron
Fe DaubréeliteFe2+Cr23+S4
Fe IronFe
Fe Iron (var: Kamacite)(Fe,Ni)
Fe Limonite(Fe,O,OH,H2O)
Fe Pentlandite(FexNiy)Σ9S8
Fe Schreibersite(Fe,Ni)3P
Fe Taenite(Fe,Ni)
Fe TroiliteFeS
NiNickel
Ni Iron (var: Kamacite)(Fe,Ni)
Ni Nickelphosphide(Ni,Fe)3P
Ni Pentlandite(FexNiy)Σ9S8
Ni Schreibersite(Fe,Ni)3P
Ni Taenite(Fe,Ni)

Regional Geology

This geological map and associated information on rock units at or nearby to the coordinates given for this locality is based on relatively small scale geological maps provided by various national Geological Surveys. This does not necessarily represent the complete geology at this locality but it gives a background for the region in which it is found.

Click on geological units on the map for more information. Click here to view full-screen map on Macrostrat.org

Paleozoic
251.902 - 541 Ma



ID: 3187973
Paleozoic sedimentary rocks

Age: Phanerozoic (251.902 - 541 Ma)

Lithology: Sedimentary rocks

Reference: Chorlton, L.B. Generalized geology of the world: bedrock domains and major faults in GIS format: a small-scale world geology map with an extended geological attribute database. doi: 10.4095/223767. Geological Survey of Canada, Open File 5529. [154]

Late Ordovician
443.8 - 458.4 Ma



ID: 1874586
Bull Fork Formation

Age: Late Ordovician (443.8 - 458.4 Ma)

Stratigraphic Name: Bull Fork Formation

Description: Interbedded limestone and shale: Limestone, more than 50 percent of formation, medium- to medium-light-gray, weathers light gray to yellowish gray; irregularly to evenly layered, generally thinly bedded but locally more than 6 inches thick; most beds contain abundant whole and broken fossils, and commonly contain pods or irregular blebs of less resistant shale. Limestone types include coarse- to fine-grained fossil-fragmental limestone, evenly bedded argillaceous and silty limestone, and rubbly-weathering limestone similar to but slightly more shaly than that of underlying unit. Common fossils include brachiopods (especially Rafinesquina, Hebertella, and dalmanellid brachiopods), bryozoans (including Hallopora, Bythopora, and Monticulipora), trilobites (Flexicalymene and Isotelus), gastropods (including Cyclonema), cephalopods, pelecypods, and crinoids. Shale and minor argillaceous siltstone interbeds, medium- to greenish-gray, calcareous, commonly laminated and moderately fissile, generally fossil poor; beds generally less than 6 inches thick. Unit very poorly exposed except in fresh cuts. Basal contact conformable, placed at base of evenly layered shale and limestone beds overlying rubbly-weathering limestone of Bellevue Tongue. \nHydrology: Ground water in the area is hard to very hard. Wells drilled in valley bottoms can be expected to yield 100 to 500 gallons per day at depths of less than 100 feet. Wells drilled on hillsides and ridgetops yield little or no water (Palmquist and Hall, 1960). Most favorable locations for large farm ponds are in the Bull Fork Formation and the upper parts of the Fairview and Kope Formations. Few ponds retain water in the limestone-rich and relatively more permeable and soluble Bellevue Tongue of the Grant Lake Limestone; chief exceptions are those fed from higher ponds located within the basal part of the Bull Fork Formation.

Comments: Ob; Walton Quadrangle (GQ-1080) | http://kgs.uky.edu/kgsweb/PubsSearching/MoreInfo.asp?titleInput=274 | Map description and column: http://kgs.uky.edu/kgsmap/kgsgeoserver/geolDescID.asp?idType=pointID&fmcode=361BLFK&gq_num=1080&map_level=24K

Lithology: Limestone | shale

Reference: KGS Databases, Maps, and Publications. Kentucky 1:24,000 Geologic Map. Kentucky Geological Survey. [22]

Ordovician
443.8 - 485.4 Ma



ID: 2900236
Bull Fork Formation

Age: Ordovician (443.8 - 485.4 Ma)

Stratigraphic Name: Bull Fork Formation

Comments: in west-central Kentucky, thickness ranges from 0-60 m; in north-central Kentucky, thickness is at least 60+ m; in northeastern Kentucky, thickness ranges from 3-65 m

Lithology: Major:{limestone}, Incidental:{shale}

Reference: Horton, J.D., C.A. San Juan, and D.B. Stoeser. The State Geologic Map Compilation (SGMC) geodatabase of the conterminous United States. doi: 10.3133/ds1052. U.S. Geological Survey Data Series 1052. [133]

Data and map coding provided by Macrostrat.org, used under Creative Commons Attribution 4.0 License

References

Sort by

Year (asc) Year (desc) Author (A-Z) Author (Z-A)
Buchwald, V. F. (1975) Handbook of Iron Meteorites. University of California Press. 3 volumes, 1418 pages.
Grady, M. M. (2000) Catalogue of Meteorites (5/e). Cambridge University Press: Cambridge, London, New York, Oakleigh, Madrid. 689 pages.

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