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Early Cambrian |
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Sweden |
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1990 |
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Cretaceous |
Tertiary |
China(Kiangsu) |
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1981 |
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Cenomanian |
Coniacian |
Wyoming |
Upshaw,C.F. Palynologic zonation of the Upper Cretaceous Frontier Formation near Dubois, Wyoming. (In: Palynology in Oil Exploration, Aureal T. Cross, editor) |
1964 |
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Cambrian |
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Poland |
Jagielska,L. Flora of the Cambrian;Microflora |
1972 |
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Ashgillian |
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Portugal |
Elaouad-Debbaj,Z. Late Ordovician acritarches of the Bucaco Syncline (Portugal); systematics-biostratigraphy-paleogeographic interests. |
1978 |
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Arenigian |
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China(Shanghai) |
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1986 |
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Aptian |
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Brazil(Maranhao) |
de Lima,M.R. Palynology of the Codo Formation, Region of Codo, Maranhao. |
1982 |
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Aptian |
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Brazil(Maranhao) |
de Lima,M.R. Palynology of the Codo Formation in the Codo Region. (In: Paleobotany and palynology of South America) |
1982 |