PBDB Collection

Well Khx-1, Muglad Basin, Sample Kh-08: Aptian - Albian, Sudan

List of taxa

Where & when

Geology

Taphonomy & methods

Metadata & references

Taxonomic list

Angiospermae

	Afropollis jardinus Doyle et al. 1982
Cycadopsida - Gnetales

	Steevesipollenites sinuosus Azema and Boltenhagen 1974
Ginkgoopsida - Ephedrales

	Ephedripites spp. Bolkhovitina and Potonié 1958
unclassified

	Concavissimisporites punctatus Pocock 1964

	Rouseisporites sp. Pocock 1962
Algae

	Algae indet.
Polypodiopsida - Schizaeales - Schizaeaceae

	Cicatricosisporites spp. Potonie and Gelletich 1933
Polypodiopsida - Schizaeales

	Appendicisporites aegyptiaca
unclassified

	Pilosisporites trichopapillosus Delcourt and Sprumont 1955
see common names

Formation:	Bentiu
Local section:	Muglad Basin	Local bed:	1997 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.

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.

Modes of preservation:	soft parts,original sporopollenin
Size of fossils:	microfossils

Collection excludes:	all microfossils
Collection methods:	chemical,hydrochloric,hydroflouric,sieve
Reason for describing collection:	biostratigraphic analysis