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Author - title
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| details | Early Valanginian | Middle Valanginian | Canada(NWT,Mackenzie) | McIntyre,D.J. et al. Valanginian miospore and microplankton assemblages from the northern Richardson Mountains, District of MacKenzie, Canada. | 1980 |
| details | Early Valanginian | Middle Valanginian | Canada(NWT,Mackenzie) | McIntyre,D.J. et al. Valanginian miospore and microplankton assemblages from the northern Richardson Mountains, District of MacKenzie, Canada. | 1980 |