Related terms:
eon
hadean
craton
archean
archaean
orogeny
rocks
devonian
paleozoic
cambrian
geologic
stromatolites
geology
metamorphic
darwin
paleontology
cyanobacteria
billion years
sedimentary
iron
billion years ago
plate tectonics
evolutionary
formation
oxygen
atmosphere
earth
Wikipedia sources:
Proterozoic
History of the Earth
Fossil
Orogeny
Archean
Phanerozoic
Modern evolutionary synthesis
Cyanobacteria
Context for words:
proterozoic
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