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Ammonoidea
Argentina
10
Cretaceous
Neuquen Basin
10
Neuquén Basin
biostratigraphy
Lower Cretaceous
8
ammonite
8
Biostratigraphy
6
South America
6
Ammonites
4
Andes
4
Hauterivian
4
uranium-lead dating
4
Acanthodiscus radiatus
2
Atacama
2
Chanarcillo
2
Chañarcillo Basin
2
Chile
2
Correlations
2
Crucibiscutum
2
Holcodiscidae
2
Holcoptychites
2
Jeanthieuloyites
2
Lithraphidites
2
Lower Hauterivian
2
Neuquen Province
2
SHRIMP dating
2
Spitidiscinae
2
Spitidiscus
2
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1
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2
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10