Well Khx-1, Muglad Basin, Sample Kh-14 (Cretaceous to of Sudan)

Where: West Kurdufan, Sudan (11.0° N, 27.7° E: paleocoordinates 9.5° S, 17.2° E)

• coordinate based on nearby landmark

When: Zone II (Barremian-Aptian) pollen zone, Abu Gabra Formation, Barremian to Barremian (129.4 - 113.0 Ma)

• 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.

Environment/lithology: fluvial-lacustrine; lithified siltstone

• 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).

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 145176: authorized by Carlos Jaramillo, entered by Gabriela Doria on 28.05.2013

Creative Commons license: CC BY (attribution)

Taxonomic list

Monocolpopollenites
  -
Monocolpopollenites sp. Pflug and Thomson 1953
Pinopsida
 Pinales - Araucariaceae
Ginkgoopsida
 Ephedrales - Ephedraceae
Ephedripites jansonii Muller 1968 jointfir
Afropollis zonatus
  -
Afropollis zonatus Doyle et al. 1982
Afropollis jardinus
  -
Afropollis jardinus Doyle et al. 1982
Cycadopsida
 Gnetales -
Steevesipollenites sinuosus Azema and Boltenhagen 1974 cycads
Pilosisporites trichopapillosus
  -
Pilosisporites trichopapillosus Delcourt and Sprumont 1955
Pteridopsida
  -
 Salviniales - Marsileaceae
 Schizaeales - Schizaeaceae
Cicatricosisporites spp. Potonie and Gelletich 1933
Verrucosisporites
  -
Lycopsida
  - Lycopodiaceae
Retitriletes sp. Pierce 1961
 Algae -
Pinidae
 Cupressales - Pinidae