| details |
Early Toarcian |
|
Italy |
Bucefalo Palliani,R. et al. Palaeoenvironmental influences of the composition and preservation of the organic matter: preliminary results from the Pozzale (Early Toarcian, Central Apennines, Italy) |
1993 |
| details |
Early Caradocian |
|
Argentina(San Juan) |
Ottone,E.G. et al. Palynomorphs conodonts and associated Graptolites from the Ordovician Los Azules Formation, Central Precordillers, Argentina |
1999 |
| details |
Middle Frasnian |
|
Belgium |
Vanguestaine,M. et al. Evolution of organic debris and palynomorph preservation in two late middle Frasnian sections, southern Dinant Synclinorium border, Belgium. |
1999 |