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From
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To
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Geolocation
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Author - title
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Year
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| details | Early Devonian | China(Szechwan) | Xiang,L. et al. Early Devonian graptolite-bearing formation and its paleontological features at Baoxing County, Sichuan, (Szechwan). | 1975 | |
| details | Downtonian | Africa(Sahara) | Richardson,J.B. The stratigraphic utilization of some Silurian and Devonian miospore species in the Northern Hemisphere. | 1974 |