Grefsheim meteorite, Lake Mjøsa, Ringsaker, Innlandet, Norwayi
| Regional Level Types | |
|---|---|
| Grefsheim meteorite | Meteorite Fall Location |
| Lake Mjøsa | Lake |
| Ringsaker | Municipality |
| Innlandet | County |
| Norway | Country |
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Latitude & Longitude (WGS84):
60° 47' 59'' North , 11° 0' 0'' East
Latitude & Longitude (decimal):
Meteorite Class:
Meteoritical Society Class:
Köppen climate type:
Nearest Settlements:
| Place | Population | Distance |
|---|---|---|
| Hamar | 29,479 (2016) | 3.7km |
| Kylstad | 312 (2012) | 7.9km |
| Brumunddal | 8,441 (2010) | 9.6km |
| Ilseng | 876 (2013) | 12.6km |
| Stange | 2,416 (2010) | 13.9km |
Nearest Clubs:
Local clubs are the best way to get access to collecting localities
Local clubs are the best way to get access to collecting localities
| Club | Location | Distance |
|---|---|---|
| Hedmark Geologiforening | Ingeberg | 13km |
Other Languages:
Norwegian:
Grefsheimmeteoritten, Mjøsa, Ringsaker, Oppland, Norge
Ordinary Chondrite, Low-Iron (L5)
Fell, January 1976; 45.5 g, in the Mjøsa Lake about 1200 m of the beach at Nes Peninsula.
Fragments of a small single stone were recovered from the ice. Griffin & Jorgensen (1979) have provided a relatively complete description of this unusually small meteorite. Olivine (Fa23.7) and pyroxene dominate the chondrules and matrix. Troilite is perhaps more conspicuous than Fe-Ni metal with minor amounts of chromite, plagioclase, and augite. While most of the olivines and pyroxenes are largely equilibrated, glass is found as well.
Grefsheim is one of 9 confirmed Norwegian meteorite falls listed with the Meteorite Bulletin Database as of late 2015. All of the witnessed Norwegian falls are chondrites (7 ordinary chondrites and 2 carbonaceous chondrites), but Grefsheim is the only Norwegian falls classified as exactly "L5" (relatively low bulk iron; moderately well-equilibrated olivine and pyroxenes at the local level).
Fell, January 1976; 45.5 g, in the Mjøsa Lake about 1200 m of the beach at Nes Peninsula.
Fragments of a small single stone were recovered from the ice. Griffin & Jorgensen (1979) have provided a relatively complete description of this unusually small meteorite. Olivine (Fa23.7) and pyroxene dominate the chondrules and matrix. Troilite is perhaps more conspicuous than Fe-Ni metal with minor amounts of chromite, plagioclase, and augite. While most of the olivines and pyroxenes are largely equilibrated, glass is found as well.
Grefsheim is one of 9 confirmed Norwegian meteorite falls listed with the Meteorite Bulletin Database as of late 2015. All of the witnessed Norwegian falls are chondrites (7 ordinary chondrites and 2 carbonaceous chondrites), but Grefsheim is the only Norwegian falls classified as exactly "L5" (relatively low bulk iron; moderately well-equilibrated olivine and pyroxenes at the local level).
Select Mineral List Type
Standard Detailed Gallery Strunz Chemical ElementsMineral List
5 valid minerals.
Meteorite/Rock Types Recorded
Select Rock List Type
Alphabetical List Tree DiagramDetailed Mineral List:
| ⓘ Augite Formula: (CaxMgyFez)(Mgy1Fez1)Si2O6 |
| ⓘ Chromite Formula: Fe2+Cr3+2O4 |
| ⓘ 'Fayalite-Forsterite Series' Description: Olivine composition (Fa23.7) usually diagnositc for L (low bulk iron) ordinary chondrites. |
| ⓘ 'Glass' |
| ⓘ Native Iron Formula: Fe |
| ⓘ Native Iron var. Kamacite Formula: (Fe,Ni) |
| ⓘ 'Orthopyroxene Subgroup' |
| ⓘ 'Plagioclase' Formula: (Na,Ca)[(Si,Al)AlSi2]O8 Description: Plagioclase is present only as a minor phase. |
| ⓘ 'Pyroxene Group' Formula: ADSi2O6 |
| ⓘ Taenite Formula: (Ni,Fe) Description: Mostly as small 10-20 µm grains. |
| ⓘ Troilite Formula: FeS Description: Found in 20-300 µm grains, esp. within the ground mass. |
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 | (Ni,Fe) |
| Group 2 - Sulphides and Sulfosalts | |||
| ⓘ | Troilite | 2.CC.10 | FeS |
| Group 4 - Oxides and Hydroxides | |||
| ⓘ | Chromite | 4.BB.05 | Fe2+Cr3+2O4 |
| Group 9 - Silicates | |||
| ⓘ | Augite | 9.DA.15 | (CaxMgyFez)(Mgy1Fez1)Si2O6 |
| Unclassified | |||
| ⓘ | 'Fayalite-Forsterite Series' | - | |
| ⓘ | 'Plagioclase' | - | (Na,Ca)[(Si,Al)AlSi2]O8 |
| ⓘ | 'Pyroxene Group' | - | ADSi2O6 |
| ⓘ | 'Orthopyroxene Subgroup' | - | |
| ⓘ | 'Glass' | - | |
List of minerals for each chemical element
| O | Oxygen | |
|---|---|---|
| O | ⓘ Augite | (CaxMgyFez)(Mgy1Fez1)Si2O6 |
| O | ⓘ Chromite | Fe2+Cr23+O4 |
| O | ⓘ Fayalite-Forsterite Series | |
| O | ⓘ Plagioclase | (Na,Ca)[(Si,Al)AlSi2]O8 |
| O | ⓘ Pyroxene Group | ADSi2O6 |
| Na | Sodium | |
| Na | ⓘ Plagioclase | (Na,Ca)[(Si,Al)AlSi2]O8 |
| Mg | Magnesium | |
| Mg | ⓘ Augite | (CaxMgyFez)(Mgy1Fez1)Si2O6 |
| Mg | ⓘ Fayalite-Forsterite Series | |
| Al | Aluminium | |
| Al | ⓘ Plagioclase | (Na,Ca)[(Si,Al)AlSi2]O8 |
| Si | Silicon | |
| Si | ⓘ Augite | (CaxMgyFez)(Mgy1Fez1)Si2O6 |
| Si | ⓘ Fayalite-Forsterite Series | |
| Si | ⓘ Plagioclase | (Na,Ca)[(Si,Al)AlSi2]O8 |
| Si | ⓘ Pyroxene Group | ADSi2O6 |
| S | Sulfur | |
| S | ⓘ Troilite | FeS |
| Ca | Calcium | |
| Ca | ⓘ Augite | (CaxMgyFez)(Mgy1Fez1)Si2O6 |
| Ca | ⓘ Plagioclase | (Na,Ca)[(Si,Al)AlSi2]O8 |
| Cr | Chromium | |
| Cr | ⓘ Chromite | Fe2+Cr23+O4 |
| Fe | Iron | |
| Fe | ⓘ Augite | (CaxMgyFez)(Mgy1Fez1)Si2O6 |
| Fe | ⓘ Chromite | Fe2+Cr23+O4 |
| Fe | ⓘ Native Iron | Fe |
| Fe | ⓘ Native Iron var. Kamacite | (Fe,Ni) |
| Fe | ⓘ Taenite | (Ni,Fe) |
| Fe | ⓘ Troilite | FeS |
| Fe | ⓘ Fayalite-Forsterite Series | |
| Ni | Nickel | |
| Ni | ⓘ Native Iron var. Kamacite | (Fe,Ni) |
| Ni | ⓘ Taenite | (Ni,Fe) |
Other Regions, Features and Areas containing this locality
Eurasian PlateTectonic Plate
- Baltic Shield
- Sveconorwegian BeltShield
EuropeContinent
Norway
- ⭔HedmarkCounty
ScandinaviaRegion
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Grefsheim meteorite, Lake Mjøsa, Ringsaker, Innlandet, Norway