Well Khx-1, Muglad Basin, Sample Kh-17: Barremian - Aptian, Sudan

List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
Equisetopsida - Cheirolepidiaceae
Classopollis spp.
Equisetopsida - Araucariaceae
Araucariacites australis Cookson 1947
Araucariacites hungaricus Deak 1964
Angiospermae
Afropollis jardinus Doyle et al. 1982
Afropollis cf. operculatus Doyle et al. 1982
Angiospermae - Nymphaeales - Nymphaeaceae
Dichastopollenites sp. May 1975
Angiospermae
Stellatopollis barghornii
unclassified
Gnetaceaepollenites fissuratus de Lima 1980
Algae
Algae indet.
Marchantiopsida - Sphaerocarpales
Aequitriradites cf. acusus Dettmann 1963
unclassified
Trilobosporites laevigatus El-Beialy 1994
Pilosisporites trichopapillosus Delcourt and Sprumont 1955
Microfoveolatosporis spp.
Pteridopsida
Matonisporites sp. Couper 1958
cf. Echinatisporis varispinosus Srivastava 1975
cf. Echinatisporis varispinosus
Deltoidospora diaphana Wilson and Webster 1946
Polypodiopsida - Marsileaceae
Crybelosporites cf. pannuceus Srivastava 1977
Polypodiopsida
Verrucosisporites rotundus Singh 1964
Verrucosisporites obscurilaesuratus Pocock 1962
Polypodiopsida - Schizaeales
Appendicisporites aegyptiaca
Polypodiopsida - Schizaeales - Schizaeaceae
Cicatricosisporites spp.
unclassified
Concavissimisporites cf. variverrucatus Brenner 1963
Concavissimisporites punctatus Pocock 1964
Cycadopsida - Gnetales
Steevesipollenites sinuosus Azema and Boltenhagen 1974
unclassified
Cycadopites sp. Wodehouse 1933
Cycadopites carpentieri Singh 1964
Ginkgoopsida - Ephedrales
Ephedripites spp.
Ephedripites jansonii Muller 1968
Ephedripites strigatus Brenner 1968
Ephedripites cf. multicostatus Brenner 1963
see common names

Geography
Country:Sudan State/province:West Kurdufan
Coordinates: 11.0° North, 27.7° East (view map)
Paleocoordinates:9.5° South, 17.2° East
Basis of coordinate:based on nearby landmark
Time
Period:Cretaceous Epoch:Early/Lower Cretaceous
Key time interval:Barremian - Aptian Pollen zone: Zone II (Barremian-Aptian)
Age range of interval:125.77000 - 113.00000 m.y. ago
Stratigraphy
Formation:Abu Gabra
Local section:Muglad Basin Local bed:2183 m
Local order:top to bottom
Stratigraphy comments: Definition. The top of this zone is indicated by the last
occurrence of Pilosisporites trichopapillosus and the
occurrence of Afropollis zonatus, Leptolepidites psarosus,
Concavissimisporites punctatus, Araucariacites
australis, Cicatricosisporites spp. and Classopollis spp.
Afropollis cf. operculatus and Concavissimisporites cf.
variverrucatus are recorded from equivalent strata of
the second study well, Khx-1.
Lithology and environment
Primary lithology: lithified siltstone
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:145179
Authorizer:C. Jaramillo Enterer:G. Doria
Research group:paleobotany
Created:2013-05-28 04:48:41 Last modified:2013-05-27 13:48:41
Access level:the public Released:2013-05-28 04:48:41
Creative Commons license:CC BY
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]