Modoc (1948) meteorite, Scott County, Kansas, USAi
| Regional Level Types | |
|---|---|
| Modoc (1948) meteorite | Meteorite Fall Location |
| Scott County | County |
| Kansas | State |
| USA | Country |
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Latitude & Longitude (WGS84):
38° 30' North , 101° 6' West
Latitude & Longitude (decimal):
Meteorite Class:
Meteoritical Society Class:
Köppen climate type:
Nearest Settlements:
| Place | Population | Distance |
|---|---|---|
| Scott City | 3,838 (2017) | 16.9km |
| Leoti | 1,484 (2017) | 22.6km |
| Healy | 234 (2017) | 43.4km |
Ordinary Chondrite (H6)
Find,1948; 1.8 kg
A stone recovered several years before was identified as a meteorite in 1948 by Harvey Nininger. Classification as a member of the H-group ordinary chondrites follows from its olivine (Fa19) and orthopyroxene ('bronzite') composition. The major silicates are accompanied by Fe-Ni metal (kamacite, taenite), troilite, and accessory chromite. Ramdohr (1973) also observed minor quantities of copper, ilmenite, isocubanite, and pentlandite. Ramdohr, one of the most accomplished mineralogists of his era, apparently considered the two sulfides isocubanite and pentlandite as preterrestrial phases. This intriguing judgement might be confirmed or refuted by isotopic analyses as the oxygen fugacities within ordinary chondrites.
Not unsurprisingly, like many meteorites recovered by Nininger, the largest specimen of the Modoc (1948) meteorite is held at the Arizona State University [831 g in 2017].
What's in a name? A widely observed and more massive L6 chondrite had fallen in the same general area in 1905. The newly recognized meteorite was named Modoc (1948) while the earlier fall was renamed as the 'Modoc (1905)' meteorite. A slightly smaller specimen of Modoc (1905) is also held at ASU.
Select Mineral List Type
Standard Detailed Gallery Strunz Chemical ElementsMineral List
8 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 |
| ⓘ 'Fayalite-Forsterite Series' Description: Olivine composition [Fa19] characteristic of H-group ordinary chondrites (Mason,1963). |
| ⓘ Ilmenite Formula: Fe2+TiO3 |
| ⓘ Isocubanite Formula: CuFe2S3 Description: Ramdohr (1973) explicitly states that he lists only those minerals that he considers 'primary' (preterrestrial). It is also worth noting that Ramdohr did not consider Modoc (1948) unusually weathered ('strongly weathered') as he would do from time to time in his observations with other meteorites. |
| ⓘ Native Copper Formula: Cu |
| ⓘ Native Iron Formula: Fe |
| ⓘ Native Iron var. Kamacite Formula: (Fe,Ni) |
| ⓘ 'Orthopyroxene Subgroup' |
| ⓘ Pentlandite Formula: (NixFey)Σ9S8 |
| ⓘ Taenite Formula: (Fe,Ni) |
| ⓘ Troilite Formula: FeS |
Gallery:
List of minerals arranged by Strunz 10th Edition classification
| Group 1 - Elements | |||
|---|---|---|---|
| ⓘ | Native Copper | 1.AA.05 | Cu |
| ⓘ | Native Iron | 1.AE.05 | Fe |
| ⓘ | var. Kamacite | 1.AE.05 | (Fe,Ni) |
| ⓘ | Taenite | 1.AE.10 | (Fe,Ni) |
| Group 2 - Sulphides and Sulfosalts | |||
| ⓘ | Pentlandite | 2.BB.15 | (NixFey)Σ9S8 |
| ⓘ | Isocubanite | 2.CB.55b | CuFe2S3 |
| ⓘ | Troilite | 2.CC.10 | FeS |
| Group 4 - Oxides and Hydroxides | |||
| ⓘ | Chromite | 4.BB.05 | Fe2+Cr3+2O4 |
| ⓘ | Ilmenite | 4.CB.05 | Fe2+TiO3 |
| Unclassified | |||
| ⓘ | 'Fayalite-Forsterite Series' | - | |
| ⓘ | 'Orthopyroxene Subgroup' | - | |
List of minerals for each chemical element
| O | Oxygen | |
|---|---|---|
| O | ⓘ Chromite | Fe2+Cr23+O4 |
| O | ⓘ Ilmenite | Fe2+TiO3 |
| O | ⓘ Fayalite-Forsterite Series | |
| Mg | Magnesium | |
| Mg | ⓘ Fayalite-Forsterite Series | |
| Si | Silicon | |
| Si | ⓘ Fayalite-Forsterite Series | |
| S | Sulfur | |
| S | ⓘ Isocubanite | CuFe2S3 |
| S | ⓘ Pentlandite | (NixFey)Σ9S8 |
| S | ⓘ Troilite | FeS |
| 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 | ⓘ Isocubanite | CuFe2S3 |
| Fe | ⓘ Native Iron var. Kamacite | (Fe,Ni) |
| Fe | ⓘ Pentlandite | (NixFey)Σ9S8 |
| Fe | ⓘ Taenite | (Fe,Ni) |
| Fe | ⓘ Troilite | FeS |
| Fe | ⓘ Fayalite-Forsterite Series | |
| Ni | Nickel | |
| Ni | ⓘ Native Iron var. Kamacite | (Fe,Ni) |
| Ni | ⓘ Pentlandite | (NixFey)Σ9S8 |
| Ni | ⓘ Taenite | (Fe,Ni) |
| Cu | Copper | |
| Cu | ⓘ Native Copper | Cu |
| Cu | ⓘ Isocubanite | CuFe2S3 |
Other Regions, Features and Areas containing this locality
North AmericaContinent
North America PlateTectonic Plate
- Anadarko BasinBasin
- Great Plains DomainDomain
- Yavapai TerraneVolcanic Arc
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