Where: West Kurdufan, Sudan (11.0° N, 27.7° E: paleocoordinates 10.2° S, 17.8° E)
• coordinate based on nearby landmark
When: Zone III (Apt.-Alb.) pollen zone, Bentiu Formation, Aptian to Aptian (125.0 - 100.5 Ma)
• Reference section. Azx-1, interval 1595–1675 m (samples
•Az 05–Az 08).
•Definition. The top of this zone is indicated by the highest
•occurrence of Verrucosisporites rotundus, Stellatopollis
•densiornatus and the presence of Aequitriradites cf. acusus,
•Retimonocolpites variplicatus, Gnetaceaepollenites diversus,
•Gnetaceaepollenites sp. and Classopollis spp. Afropollis
•jardinus, Appendicisporis aegyptiaca and Steevesipollenites
•sinuosus occur just below the top of this zone.
Environment/lithology: fluvial-lacustrine; lithified sandstone
Size class: microfossils
Preservation: soft parts, original sporopollenin
Collection methods: chemical, hydrochloric, hydroflouric, sieve
Primary reference: A. A. M. Eisawi, A. B. Ibrahim, O. B. A. Rahim and E. Schrank. 2012. Palynozonation of the Cretaceous to Lower Paleogene Strata of the Muglad Basin, Sudan. Palynology 36(2):191-207 [C. Jaramillo/G. Doria/A. Cardenas ]more details
Purpose of describing collection: biostratigraphic analysis
PaleoDB collection 145164: authorized by Carlos Jaramillo, entered by Gabriela Doria on 28.05.2013
Creative Commons license: CC BY (attribution)
Taxonomic list
Equisetopsida | |
Gnetaceaepollenites | |
Gnetaceaepollenites spp. Thiergart 1938 | |
Algae | |
Marchantiopsida | |
Aequitriradites cf. acusus Dettmann 1963 | |
Rouseisporites | |
Rouseisporites sp. Pocock 1962 | |
Pteridopsida | |
Cyathidites sp. Couper 1953 | |
Polypodiopsida | |
Leptolepidites spp. Couper 1953 | |
Verrucosisporites rotundus Singh 1964 | |
Cicatricosisporites spp. Potonie and Gelletich 1933
Cicatricosisporites salardii Dejax 1985 | |
Concavissimisporites | |
Concavissimisporites punctatus Pocock 1964 | |
Cycadopsida | |
Steevesipollenites sinuosus Azema and Boltenhagen 1974 cycads | |
Cycadopites | |
Cycadopites sp. Wodehouse 1933 | |
Ginkgoopsida | |
Ephedripites spp. Bolkhovitina and Potonié 1958
Ephedripites jansonii Muller 1968 |