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Pinnacle Island, Murray Ridge, Endeavour Crater, Meridiani Planum, Terra Meridiani, Marsi
Regional Level Types
Pinnacle IslandIsland
Murray RidgeRidge
Endeavour CraterCrater
Meridiani Planum- not defined -
Terra Meridiani- not defined -

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Locality type:Island

A rock overturned by the Opportunity rover. Dark coating (spectrally resembling the so-called desert varnish, thus may be composed of, i.a., birnessite) + light-toned coating (Mg sulfates).

Select Mineral List Type

Standard Detailed Strunz Dana Chemical Elements

Mineral List

2 valid minerals.

Detailed Mineral List:

Epsomite ?
Formula: MgSO4 · 7H2O
Kieserite ?
Formula: MgSO4 · H2O

List of minerals arranged by Strunz 10th Edition classification

Group 7 - Sulphates, Chromates, Molybdates and Tungstates
Epsomite ?7.CB.40MgSO4 · 7H2O
Kieserite ?7.CB.05MgSO4 · H2O

List of minerals arranged by Dana 8th Edition classification

Epsomite ? · 7H2O
Kieserite ? · H2O

List of minerals for each chemical element

H KieseriteMgSO4 · H2O
H EpsomiteMgSO4 · 7H2O
O KieseriteMgSO4 · H2O
O EpsomiteMgSO4 · 7H2O
Mg KieseriteMgSO4 · H2O
Mg EpsomiteMgSO4 · 7H2O
S KieseriteMgSO4 · H2O
S EpsomiteMgSO4 · 7H2O


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Farrand, W.H., Johnson, J.R., Rice, M.S., Wang, A., Bell, III, J.F. (2016) VNIR Multispectral Observations of Aqueous Alteration Materials by the Pancams on the Spirit and Opportunity Mars Exploration Rovers. American Mineralogist, 101:9, 2005-2019.

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