Well Khx-1, Muglad Basin, Sample Kh-11: Aptian - Albian, Sudan

List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
Lycopodiopsida - Selaginellales
Equisetopsida - Cheirolepidiaceae
Classopollis spp. Pflug 1953
Equisetopsida - Araucariaceae
unclassified
Monocolpopollenites sp. Pflug and Thomson 1953
Cycadopsida - Gnetales
Steevesipollenites sinuosus Azema and Boltenhagen 1974
unclassified
Cycadopites sp. Wodehouse 1933
Ginkgoopsida - Ephedrales
unclassified
Polypodiopsida - Blechnaceae
Polypodiopsida - Polypodiales - Pteridaceae
Contignisporites sp. Dettmann 1963
Polypodiopsida - Schizaeales - Schizaeaceae
Cicatricosisporites spp. Potonie and Gelletich 1933
Cicatricosisporites mohrioides Delcourt and Sprumont 1955
Polypodiopsida - Schizaeales
Polypodiopsida - Marsileaceae
Polypodiopsida - Gleicheniaceae
unclassified
Pilosisporites trichopapillosus Delcourt and Sprumont 1955
Angiospermae
Afropollis jardinus Doyle et al. 1982
Afropollis cf. operculatus Doyle et al. 1982
Afropollis zonatus Doyle et al. 1982
Retimonocolpites variplicatus Schrank and Mahmoud 1998
unclassified
Rouseisporites sp. Pocock 1962
Marchantiopsida - Sphaerocarpales
Algae
unclassified
Gemmatriletes sp. Pierce 1961
see common names

Geography
Country:Sudan State/province:West Kurdufan
Coordinates: 11.0° North, 27.7° East (view map)
Paleocoordinates:6.6° South, 28.4° East (Wright 2013)
Basis of coordinate:based on nearby landmark
Time
Period: Cretaceous Epoch: Early Cretaceous
Stage: Aptian - Albian 10 m.y. bin: Cretaceous 3 - Cretaceous 4
Key time interval: Aptian - Albian Pollen zone:  Zone III (Apt.-Alb.)
Age range of interval: 121.4 - 100.5 m.y. ago
Stratigraphy
Formation:Bentiu
Local section:Muglad Basin Local bed:2027 m
Local order:top to bottom
Stratigraphy comments: 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.
Lithology and environment
Primary lithology: lithified sandstone
Lithology description: The successions in several deep wells in the Muglad Basin consist of thick Lower Cretaceous to Paleogene–Neogene strata of claystones, fluvio-lacustrine sandstones and siltstones (Schull 1988). Based on seismic and log interpretations, twelve formations are distinguished in the Muglad Basin of which thick beds of shales and claystones interbedded with fine sandstones and siltstones constitute the Abu Gabra Formation (Neocomian–Aptian), the main source rock in the Muglad Basin. The reservoir rock is the thick sandstone sequence of the Bentiu Formation (Aptian–Cenomanian).
Environment:fluvial-lacustrine indet.
Taphonomy
Modes of preservation:soft parts,original sporopollenin
Size of fossils:microfossils
Collection methods and comments
Collection excludes:all microfossils
Collection methods:chemical,hydrochloric,hydroflouric,sieve
Reason for describing collection:biostratigraphic analysis
Metadata
Database number:145172
Authorizer:C. Jaramillo Enterer:G. Doria
Research group:paleobotany
Created:2013-05-28 04:39:17 Last modified:2025-02-22 15:12:02
Access level:the public Released:2013-05-28 04:39:17
Creative Commons license:CC0
Reference information

Primary reference:
46944. 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. Cárdenas]