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Carboniferous
biostratigraphy
palynology
Argentina
14
Biostratigraphy
10
Palynology
8
Permian
6
Raistrickia
6
South America
6
biozonation
6
geochronology
6
Bacteria (microorganisms)
4
Early Carboniferous
4
Entovalva
4
Geochronology
4
Invertebrata
4
Kraeuselisporites
4
Systematics
4
Tarija basin
4
Vittatina
4
age determination
4
algae
4
fossil assemblage
4
palynomorph
4
Acritarcha
2
Algae
2
Ambo Formation
2
Angualasto Group
2
Archaeosigillaria
2
Argentina, San Rafael Basin
2
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8Publicado 2007
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