Description: A bluegreenish crust on an ultramafic rock was identified by XRD by G. Raade, Oslo in 1983 to be a mixture of brucite and pyroaurite. Chemical analysis needed to confirm identification.

ⓘ 'Stilbite Subgroup'

Formula: M_6-7[Al_8-9Si_27-28O₇₂] · nH₂O

Localities:

Arna, Bergen, Vestland, Norway
Skuggestrand, Arna, Bergen, Vestland, Norway

Colour: reddish brown

References:

Knut Edvard Larsen (2023) Collection.

ⓘ Zircon

Formula: Zr(SiO₄)

Localities:

Skuggestrand, Arna, Bergen, Vestland, Norway
Takvam, Arna, Bergen, Vestland, Norway
Osterøy Bridge, Arna, Bergen, Vestland, Norway
Skuggestranda, Indre Arna, Arna, Bergen, Vestland, Norway

References:

Collection of Peter Andresen.

Gallery:

List of minerals arranged by Strunz 10th Edition classification

Group 4 - Oxides and Hydroxides
ⓘ	Brucite	4.FE.05	Mg(OH)₂
Group 5 - Nitrates and Carbonates
ⓘ	Calcite	5.AB.05	CaCO₃
ⓘ	'Hydrotalcite-2H'	5.DA.45	Mg₆Al₂(CO₃)(OH)₁₆ · 4H₂O
ⓘ	Pyroaurite ?	5.DA.50	Mg₆Fe³⁺₂(OH)₁₆[CO₃] · 4H₂O
Group 9 - Silicates
ⓘ	Zircon	9.AD.30	Zr(SiO₄)
ⓘ	Laumontite	9.GB.10	CaAl₂Si₄O₁₂ · 4H₂O
Unclassified
ⓘ	'Stilbite Subgroup'	-	M_6-7[Al_8-9Si_27-28O₇₂] · nH₂O
ⓘ	'Fayalite-Forsterite Series'	-

List of minerals for each chemical element

H	Hydrogen
H	ⓘ Brucite	Mg(OH)₂
H	ⓘ Laumontite	CaAl₂Si₄O₁₂ · 4H₂O
H	ⓘ Hydrotalcite-2H	Mg₆Al₂(CO₃)(OH)₁₆ · 4H₂O
H	ⓘ Pyroaurite	Mg₆Fe₂³⁺(OH)₁₆[CO₃] · 4H₂O
H	ⓘ Stilbite Subgroup	M_6-7[Al_8-9Si_27-28O₇₂] · nH₂O
C	Carbon
C	ⓘ Calcite	CaCO₃
C	ⓘ Hydrotalcite-2H	Mg₆Al₂(CO₃)(OH)₁₆ · 4H₂O
C	ⓘ Pyroaurite	Mg₆Fe₂³⁺(OH)₁₆[CO₃] · 4H₂O
O	Oxygen
O	ⓘ Brucite	Mg(OH)₂
O	ⓘ Calcite	CaCO₃
O	ⓘ Laumontite	CaAl₂Si₄O₁₂ · 4H₂O
O	ⓘ Hydrotalcite-2H	Mg₆Al₂(CO₃)(OH)₁₆ · 4H₂O
O	ⓘ Pyroaurite	Mg₆Fe₂³⁺(OH)₁₆[CO₃] · 4H₂O
O	ⓘ Stilbite Subgroup	M_6-7[Al_8-9Si_27-28O₇₂] · nH₂O
O	ⓘ Zircon	Zr(SiO₄)
Mg	Magnesium
Mg	ⓘ Brucite	Mg(OH)₂
Mg	ⓘ Hydrotalcite-2H	Mg₆Al₂(CO₃)(OH)₁₆ · 4H₂O
Mg	ⓘ Pyroaurite	Mg₆Fe₂³⁺(OH)₁₆[CO₃] · 4H₂O
Al	Aluminium
Al	ⓘ Laumontite	CaAl₂Si₄O₁₂ · 4H₂O
Al	ⓘ Hydrotalcite-2H	Mg₆Al₂(CO₃)(OH)₁₆ · 4H₂O
Al	ⓘ Stilbite Subgroup	M_6-7[Al_8-9Si_27-28O₇₂] · nH₂O
Si	Silicon
Si	ⓘ Laumontite	CaAl₂Si₄O₁₂ · 4H₂O
Si	ⓘ Stilbite Subgroup	M_6-7[Al_8-9Si_27-28O₇₂] · nH₂O
Si	ⓘ Zircon	Zr(SiO₄)
Ca	Calcium
Ca	ⓘ Calcite	CaCO₃
Ca	ⓘ Laumontite	CaAl₂Si₄O₁₂ · 4H₂O
Fe	Iron
Fe	ⓘ Pyroaurite	Mg₆Fe₂³⁺(OH)₁₆[CO₃] · 4H₂O
Zr	Zirconium
Zr	ⓘ Zircon	Zr(SiO₄)

Fossils

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Other Databases

Wikipedia:	https://en.wikipedia.org/wiki/Arna,_Norway
Wikidata ID:	Q2863029

Localities in this Region

Norway

Vestland
- Bergen
  - Arna

Other Regions, Features and Areas that Intersect

Eurasian PlateTectonic Plate

Norway

Western Gneiss RegionGeologic Region

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Arna, Bergen, Vestland, NorwayiRegional Level TypesArnaBorough BergenMunicipality VestlandCounty NorwayCountry function showexplain() { $("#locexplain").toggle(); if (typeof movemap === "function") movemap(); }

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