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4_Mid-Cret.pdf
4_Mid-Cret.pdf
http://stratigraphy.science.purdue.edu/charts/Timeslices/4_Mid-Cret.pdf
Barremian
Albian
Aptian
Hauterivian
Valanginian
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4_Mid-Cret.pdf
http://stratigraphy.science.purdue.edu/charts/Timeslices/4_Mid-Cret.pdf