PBDB Collection

Well Azx-1, Muglad Basin, Sample Az-28 (Cretaceous to of Sudan)

Where: South Kurdufan, Sudan (11.0° N, 27.7° E: paleocoordinates 8.1° S, 16.3° E)

• coordinate based on nearby landmark

When: Abu Gabra Formation, Neocomian to Neocomian (145.0 - 125.0 Ma)

• bed-level stratigraphic resolution

Environment/lithology: fluvial-lacustrine; lithified sandstone

• 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 172852: authorized by Carlos Jaramillo, entered by Patricio Santamarina on 27.08.2015

Creative Commons license: CC BY (attribution)

Taxonomic list

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Equisetopsida
Pinidae - Pinidae	Balmeiopsis limbatus, Araucariacites hungaricus, Araucariacites australis, Classopollis spp. Balmeiopsis limbatus Balme 1957 Araucariacites hungaricus Deak 1964 Araucariacites australis Cookson 1947 Classopollis spp. Pflug 1953
Cupressales - Pinidae	"Spheripollenites scabratus" = Sphaeripollenites "Spheripollenites scabratus" = Sphaeripollenites
Gnetaceaepollenites
-	Gnetaceaepollenites sp. Gnetaceaepollenites sp. Thiergart 1938
Angiospermae
-	Retimonocolpites variplicatus, Stellatopollis densiornatus Retimonocolpites variplicatus Schrank and Mahmoud 1998 Stellatopollis densiornatus Ward 1986
Polypodiopsida
- Marsileaceae	Crybelosporites cf. pannuceus Crybelosporites cf. pannuceus Srivastava 1977
-	Verrucosisporites rotundus Verrucosisporites rotundus Singh 1964
Schizaeales - Polypodiidae	Cicatricosisporites spp., Cicatricosisporites cf. australiensis, Cicatricosisporites salardii Cicatricosisporites spp. Potonie and Gelletich 1933 Cicatricosisporites cf. australiensis Potonié 1956 Cicatricosisporites salardii Dejax 1985
- Blechnaceae	Leptolepidites psarosus Leptolepidites psarosus Norris 1969
- Gleicheniaceae	Gleicheniidites senonicus Gleicheniidites senonicus Ross 1949
Pteridopsida
-	Cingulatisporites "sp. SCI 170", Cyathidites sp., Todisporites minor Cingulatisporites "sp. SCI 170" Thomson et al. 1953 Cyathidites sp. Couper 1953 Todisporites minor Couper 1953
Coptospora
-	Coptospora sp. Coptospora sp. Dettmann 1963
Rouseisporites
-	Rouseisporites sp. Rouseisporites sp. Pocock 1962
Marchantiopsida
Sphaerocarpales -	Aequitriradites cf. acusus Aequitriradites cf. acusus Dettmann 1963
Ginkgoopsida
Ephedrales -	Ephedripites spp., Ephedripites cf. multicostatus Ephedripites spp. Bolkhovitina and Potonié 1958 Ephedripites cf. multicostatus Brenner 1963
Cycadopites
-	Cycadopites sp. Cycadopites sp. Wodehouse 1933
Cycadopsida
Gnetales -	Steevesipollenites sinuosus Steevesipollenites sinuosus Azema and Boltenhagen 1974 cycads
Concavissimisporites
-	Concavissimisporites punctatus Concavissimisporites punctatus Pocock 1964
Lycopodiopsida
Selaginellales -	? Densoisporites sp. ? Densoisporites sp. Dettmann 1963 clubmoss
Dinophyceae
Peridiniales - Peridiniaceae	Holmwoodinium notatum Holmwoodinium notatum Batten 1985