original |
Early Frasnian |
|
Brazil(Para) |
Grahn,Y. et al. Chitinozoan biostratigraphy of the Late Devonian formations in well Caima PH-2, TapajŠ³s River area, Amazonas Basin, northern Brazil |
2002 |
details |
Early Frasnian |
|
|
Grahn,Y. et al. Middle and Upper Devonian Chitinozoan biostratigraphy of the Parana Basin in Brazil and Paraguay. |
2002 |
details |
Early Frasnian |
|
Paraguay |
Grahn,Y. et al. Middle and Upper Devonian Chitinozoan biostratigraphy of the Parana Basin in Brazil and Paraguay. |
2002 |
details |
Early Frasnian |
|
|
Grahn,Y. Devonian chitinozoan biozones of Western Gondwana. |
2005 |