Gjerdingselva, Lunner, Akershus, Norwayi
| Regional Level Types | |
|---|---|
| Gjerdingselva | Group of Outcrops |
| Lunner | Municipality |
| Akershus | County |
| Norway | Country |
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Latitude & Longitude (WGS84):
60° 11' 2'' North , 10° 38' 53'' East
Latitude & Longitude (decimal):
Type:
Group of Outcrops
Age:
298.9 ± 0.15 to 252.17 ± 0.06 Ma
Köppen climate type:
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 |
|---|---|---|
| Steinklubben | Skjetten | 31km |
Other/historical names associated with this locality:
Gjerdingen; Stryken; Skillingsveien; Nordmarka
Other Languages:
Norwegian:
Gjerdingselva, Lunner, Akershus, Norge
The locality is located about 1 km east of Lake Gjerdingen and consists of small outcrops/road cuts beside the dirt road from Lake Gjerdingen, close to Gjerdingselva (river), going to Stryken Station. It is a part of the "ekerite" (a soda granite) rich in zirconium, titanium, and fluorine, locally occurring as an "elpidite-ekerite" and very locally as a "janhaugite-elpidite-ekerite". GPS coordinates are approximate for the dirt road.
Select Mineral List Type
Standard Detailed Gallery Strunz Chemical ElementsMineral List
62 valid minerals. 3 (TL) - type locality of valid minerals. 1 erroneous literature entry.
Rock Types Recorded
Select Rock List Type
Alphabetical List Tree DiagramDetailed Mineral List:
| ⓘ Aegirine Formula: NaFe3+Si2O6 References: |
| ⓘ Albite Formula: Na(AlSi3O8) |
| ⓘ Allophane Formula: (Al2O3)(SiO2)1.3-2 · 2.5-3H2O Colour: Brownish red Description: wax-like (X-ray amorphous materiale) References: |
| ⓘ Anatase Formula: TiO2 Description: Small crystals (< 1mm) in pseudomorphoses after a Ti-mineral (narsarsukite?) References: |
| ⓘ Andradite Formula: Ca3Fe3+2(SiO4)3 Habit: massive Colour: yellow to brown Description: Mn-rich. Intergrown with rhodonite |
| ⓘ Formula: K2NaFe2+7Ti2[Si4O12]2O2(OH)4F Description: Reported in Raade & Haug (1980), but later shown to be kupletskite References: |
| ⓘ Baotite Formula: Ba4(Ti,Nb,W)8O16(SiO3)4Cl References: Canadian Museum of Nature collectionIdentified by Paula Piilonen: EPMA |
| ⓘ Bastnäsite-(Ce) Formula: Ce(CO3)F Habit: Yellow spherulites Description: Also as pseudomorphs after an octahedral pyrochlore group mineral and as pseudomorphs after flattened dipyramidal zircon crystals References: |
| ⓘ Birnessite ? Formula: (Na,Ca)0.5(Mn4+,Mn3+)2O4 · 1.5H2O |
| ⓘ Brookite Formula: TiO2 Description: Occure usually in pseudomorphoses after a Ti mineral (narsarsukite?), as small black crystals together with anatase and elpidite. |
| ⓘ Catapleiite Formula: Na2Zr(Si3O9) · 2H2O Description: Raade & Haug (1980): "The presence of titanite, catapleiite and zeophyllite as reported by Dietrich et al. (1965) has not been confirmed by us."
Confirmed by pXRD, Canadian Museum of Nature; November 26, 2025 References: CMN CollectionIdentified by Paula Piilonen: XRD |
| ⓘ Cerianite-(Ce) ? Formula: (Ce4+,Th)O2 Description: According to (Neumann 1985) Kristiansen reports having found cerianite-(Ce) in a cavity in elpidite-ekerite at Gjerdingen. The mineral sample was completely used for identification (XRD only). Identification doubtful. |
| ⓘ Clinochlore Formula: Mg5Al(AlSi3O10)(OH)8 |
| ⓘ Columbite-(Fe) Formula: Fe2+Nb2O6 |
| ⓘ 'Columbite-(Fe)-Columbite-(Mn) Series' Habit: As starlike twins (trilling) up to 1mm Description: Found in one sample as a starlike aggregate(trilling) up to 1mm, probably an epitaxial growth on a unidentified mineral (Raade 1982) References: |
| ⓘ Cryolite Formula: Na2NaAlF6 Description: Found in one piece only (K.Eldjarn collection) |
| ⓘ Dalyite Formula: K2ZrSi6O15 Description: Typically found in close contact with janhaugite. |
| ⓘ Doyleite Formula: Al(OH)3 References: |
| ⓘ Elpidite Formula: Na2ZrSi6O15 · 3H2O |
| ⓘ Elpidite var. Calcium-bearing Elpidite Formula: (Na,Ca)2ZrSi6O15 · 3H2O References: |
| ⓘ Epididymite Formula: Na2Be2Si6O15 · H2O |
| ⓘ Fluorite Formula: CaF2 Habit: octahedron faces dominant or more complex forms Colour: violet; colorless |
| ⓘ Fluornatropyrochlore Formula: (Na,Pb,Ca,REE,U)2Nb2O6F References: Canadian Museum of Nature collectionIdentified by Paula Piilonen: EPMA |
| ✪ Gagarinite-(Y) Formula: NaCaYF6 Habit: tabular, long to short prismatic; hexagonal prisms; often not terminated xls Colour: Pale rose; colorless Description: Commonly in association with monazite-(Ce) |
| ⓘ Galena Formula: PbS References: |
| ⓘ Gearksutite Formula: Ca[Al(F,OH)5(H2O)] Habit: chalk-like masses Colour: white to light rose Description: Occurs as white, chalky masses filling cavities, consisting of submicroscopic platy crystals. References: |
| ⓘ Genthelvite Formula: Be3Zn4(SiO4)3S |
| ⓘ Gjerdingenite-Fe (TL) Formula: K2Fe2+(Nb,Ti)4(Si4O12)2(O,OH)4 · 6H2O Type Locality: |
| ⓘ Gjerdingenite-Mn (TL) Formula: K2Mn2+(Nb,Ti)4(Si4O12)2(O,OH)4 · 6H2O Type Locality: References: Raade, Gunnar, Chukanov, Nikita V., Kolitsch, Uwe, Möckel, Steffen, Zadov, Aleksandr E., Pekov, Igor V. (2004) Gjerdingenite-Mn from Norway a new mineral species in the labuntsovite group: descriptive data and crystal structure. European Journal of Mineralogy, 16 (6) 979-987 doi:10.1127/0935-1221/2004/0016-0979 |
| ⓘ 'Glauconite' Formula: K0.60-0.85(Fe3+,Mg,Al)2(Si,Al)4O10](OH)2 References: CMN CollectionIdentified by Paula Piilonen: Visual Identification, XRD |
| ⓘ Goethite Formula: Fe3+O(OH) References: |
| ⓘ Helvine Formula: Be3Mn2+4(SiO4)3S References: |
| ⓘ Hematite Formula: Fe2O3 References: |
| ⓘ Hydrokenoralstonite Formula: Na0.5(Al,Mg)2(F,OH)6 · H2O Habit: Masses filling interstices between feldspar xls; botryoidal growths (white); microcrystalline coatings on other minerals (cubes and octahedra). Colour: Green, white and colourless. Description: Usually as green masses, consisting of submicroscopic crystals. Also as clear/white sugar-like coating in cavities. Rarely as up to 1 mm sized cubic or octahedral crystals. References: |
| ⓘ Janhaugite (TL) Formula: (Na,Ca)3(Mn2+,Fe2+)3(Ti,Zr,Nb)2(Si2O7)2O2(OH,F)2 Type Locality: |
| ⓘ Kaolinite Formula: Al2(Si2O5)(OH)4 |
| ⓘ Kupletskite Formula: K2NaMn2+7Ti2[Si4O12]2O2(OH)4F References: |
| ⓘ Lorenzenite Formula: Na2Ti2(Si2O6)O3 References: |
| ⓘ Marcasite Formula: FeS2 References: |
| ⓘ Microcline Formula: K(AlSi3O8) |
| ⓘ Molybdenite Formula: MoS2 |
| ⓘ Monazite-(Ce) Formula: Ce(PO4) References: |
| ⓘ Montmorillonite Formula: (Na,Ca)0.33(Al,Mg)2(Si4O10)(OH)2 · nH2O References: |
| ⓘ 'Muscovite-1M' Formula: KAl2(AlSi3O10)(OH)2 |
| ⓘ Narsarsukite Formula: Na2(Ti,Fe3+)Si4(O,F)11 |
| ⓘ Native Sulphur Formula: S8 References: |
| ⓘ Neighborite Formula: NaMgF3 Habit: simple cubelike, more or less elongated crystals Colour: colorless to pale brownish Description: Neighborite is only found in a fine grained variety of the ekerite rock.
NB: Difficult in some cases to distinguish from pale brownish cleavages of rhodochrosite |
| ⓘ Opal Formula: SiO2 · nH2O |
| ⓘ Orthoclase Formula: K(AlSi3O8) |
| ⓘ Pachnolite Formula: NaCa[AlF6] · H2O Habit: Columnar crystals with basal termination. Forms clusters with a network structure with 2 different orientations of the crystals at right angles. Basal pinacoid {001} and prism {110} Colour: white |
| ⓘ Phlogopite Formula: KMg3(AlSi3O10)(OH)2 Habit: Platy aggregates, the plates sometimes having distinct six-sided outlines Colour: colourless to white Description: Polytype 2M1 |
| ⓘ 'Phlogopite-2M1' Formula: KMg3(AlSi3O10)(OH)2 |
| ⓘ Pyrite Formula: FeS2 |
| ⓘ 'Pyrochlore Group' Formula: A2Nb2(O,OH)6Z Description: A pyrochlore crystal is analyzed and show to consist of plumbopyrochlore annd ceriopyrochlore-(Ce) (Raade 2009) |
| ⓘ 'Pyrochlore Group var. Ceriopyrochlore (of Hogarth 1977)' Formula: (A,Ce)2Nb2(O,OH)6Z Description: BSE-images and EMP analysis of a crystal of a pyrochlore group minera showed that the crystal consisted of ceriopyrochlore-(Y) as the central part and plumbopyrochlore as the outer rim (Raade 2009). |
| ⓘ 'Pyrochlore Group var. Plumbopyrochlore (of Skorobogatova et al.)' Formula: (Pb,Y,U,Ca)2-xNb2O6(OH) Description: Found in one crystals BSE-images and EMP analysis showed that the crystal consisted of ceriopyrochlore-(Y) as the central part and plumbopyrochlore as the outer rim (Raade 2009) |
| ⓘ Pyrophanite Formula: Mn2+TiO3 References: |
| ⓘ Quartz Formula: SiO2 References: |
| ⓘ Rhodochrosite Formula: MnCO3 Colour: pale brownish Description: Occurs sometimes together with neighborite (Raade & Haug 1980) References: |
| ⓘ Rhodonite Formula: CaMn3Mn[Si5O15] References: |
| ⓘ Riebeckite Formula: ◻Na2(Fe2+3Fe3+2)Si8O22(OH)2 |
| ⓘ Rutile Formula: TiO2 References: |
| ⓘ Rutile var. Niobium-bearing Rutile Formula: (Ti,Nb)O2 |
| ⓘ Sellaite Formula: MgF2 Habit: masses; rough crystals in the form of flat tetragonal bipyramids Colour: colourless, white Description: found as nice colourless crystals in miarolitic cavities |
| ⓘ Sphalerite Formula: ZnS Habit: singel & twin crystals Colour: yellow, dark redbrown References: |
| ⓘ Stilpnomelane Formula: K4Fe2+48[Si64Al8]O164(OH)52 · nH2O |
| ⓘ Thomsenolite Formula: NaCa[AlF6] · H2O Habit: Groups of tabular xls with prism {110} and basal pinacoid {001} Colour: white Description: Occurs as tabular, white crystals, often associated with younger ralstonite. |
| ⓘ Thorite Formula: Th(SiO4) References: Canadian Museum of Nature collectionIdentified by Paula Piilonen: XRD |
| ⓘ Titanite ? Formula: CaTi(SiO4)O Description: Raade & Haug (1980): "The presence of titanite, catapleiite and zeophyllite as reported by Dietrich et al. (1965) has not been confirmed by us." References: |
| ⓘ Wulfenite Formula: Pb(MoO4) Habit: Dipyramidal Description: Astrid Haugen has found a dipyramidal crystal of wulfenite. The specimen was given to the Gjerdingen reference collection in the Mineralogical Museum in Oslo. |
| ⓘ Zeophyllite ? Formula: Ca13Si10O28(OH)2F8 · 6H2O Description: Raade & Haug (1980): "The presence of titanite, catapleiite and zeophyllite as reported by Dietrich et al. (1965) has not been confirmed by us." References: |
| ⓘ Zircon Formula: Zr(SiO4) References: |
Gjerdingselva, Lunner, Akershus, Norway