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Precambrian
Arctic
1
Eoarchean
1
Geology
1
Isua supracrustal belt
1
Keywords: banded iron formation
1
Mars
1
Phanerozoic
1
Spitsbergen
1
Svalbard
1
Svalbard and Jan Mayen
1
basalt
1
breccia
1
chemical reaction
1
chemical weathering
1
continental crust
1
depositional environment
1
early atmosphere
1
faint early Sun
1
fine grained sediment
1
glacial erosion
1
gypsum
1
ice cap
1
igneous rock
1
melting
1
oxidation
1
polar region
1
proglacial environment
1
sedimentary rock
1
storm deposits
1
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