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Grillid (Cave S-4), Surtsey Island, Vestmannaeyjar archipelago (Westman islands), Iceland

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Lava tube on western portion of island.



References:
- Jacobsson et al. (1992): Encrustations from Lava Caves in Surtsey, Iceland. A Preliminary Report: Surtsey Research Progress Report X: 73-78 Reykjevik, Iceland.





 Map Reference: 63°18'N , 20°35'W

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Group 1 - Elements
  		• Sulphur1.CC.05
    S
     
    8
    Group 3 - Halides
  		• Carnallite3.BA.10
    KMgCl
     
    3
    		·6H
     
    2
    		O
  		• Fluorite3.AB.25
    CaF
     
    2
  		• Halite3.AA.20
    NaCl
  		• Ralstonite3.CF.05
    NaMgAl(F,OH)
     
    6
    		·H
     
    2
    		O
    Group 4 - Oxides and Hydroxides
  		• Opal4.DA.10
    SiO
     
    2
    		·nH
     
    2
    		O
    Group 5 - Nitrates and Carbonates
  		• Calcite5.AB.05
    CaCO
     
    3
    Group 7 - Sulphates, Chromates, Molybdates and Tungstates
  		• Anhydrite7.AD.30
    CaSO
     
    4
  		• Aphthitalite7.AC.35
    (K,Na)
     
    3
    		Na(SO
     
    4
    		)
     
    2
  		• Blödite7.CC.50
    Na
     
    2
    		Mg(SO
     
    4
    		)
     
    2
    		·4H
     
    2
    		O
  		• Galeite7.BD.10
    Na
     
    15
    		[F
     
    4
    		|Cl|(SO
     
    4
    		)
     
    5
    		]
  		• Glauberite7.AD.25
    Na
     
    2
    		Ca(SO
     
    4
    		)
     
    2
  		• Gypsum7.CD.40
    Ca[SO
     
    4
    		] · 2H
     
    2
    		O
  		• Kainite7.DF.10
    KMg[Cl|SO
     
    4
    		] · 3H
     
    2
    		O
  		• Kieserite7.CB.05
    MgSO
     
    4
    		·H
     
    2
    		O
  		• Löweite7.CC.45
    Na
     
    12
    		Mg
     
    7
    		(SO
     
    4
    		)
     
    13
  		• Thenardite7.AC.25
    Na
     
    2
    		SO
     
    4
    Group 9 - Silicates
  		• Analcime9.GB.05
    Na
     
    2
    		[Al
     
    2
    		Si
     
    4
    		O
     
    12
    		] · 2H
     
    2
    		O
  		• Tobermorite9.DG.10
    Ca
     
    5
    		Si
     
    6
    		(O,OH)
     
    18
    		·5H
     
    2
    		O
  		• Xonotlite9.DG.35
    Ca
     
    6
    		Si
     
    6
    		O
     
    17
    		(OH)
     
    2
    Unclassified Minerals
  		• 'Chabazite'-
  		• 'Phillipsite'-
  		• 'Smectite Group'-
    A
     
    0.3
    		D
     
    2-3
    		[T
     
    4
    		O
     
    10
    		]Z
     
    2
    		·nH
     
    2
    		O


    23 entries listed. 20 valid minerals.

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