link
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From
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Geolocation
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Author - title
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Year
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details | Early Oligocene | Colombia | de Porta,J. et al. Discussion of the age of the Hoyon, Gualanday and Cira Formations in the Region of Honda-San Juan de Rio Seco, (Magdelena Valley). | 1963 | |
original | Sparnacian | Hungary | Kedves,M. Palynologic investigations from the Dorog Basin. II. | 1961 |