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Palynologic investigation of Late Eocene to Early Oligocene lignites from Fayum Oasis, Egypt


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Title: Palynologic investigation of Late Eocene to Early Oligocene lignites from Fayum Oasis, Egypt
Authors: Takahashi, Kiyoshi / Jux, Ulrich
Issue Date: Jan-1989
Citation: 長崎大学教養部紀要. 自然科学篇. 1989, 29(2), p.369-463
Abstract: In the fluviomarine Qasr El Sagha Formation, which is exposed in the Fayum Oasis of Egypt, a noticeable horizon composed of lignitic clays, carbonaceous and peaty marls, was palynologically investigated. The biostratigraphic age of the formation is confined to Late Eocene and Early Oligocene due to calcareous nannoplankton [e. g. Ericsonia eopelagica (Bramlette & Riedel) Roth, Chiasmolithus oamaruensis (Deflandre) Hay, Mohler & Wade], furthermore the full marine Birket El Qarun Formation below contains reliable index fossils of the Late Eocene and the fluviatile Gabel Qatrani Formation above has some reputation because of its richness in Early Oligocene vertebrates. A total of 86 different species of dispersed palynomorphs were identified with the following 18 newly described forms: Undulatisporites fayumensis n. sp., Laevigatosporites aegyptiacus n. sp., L. undulatus n. sp., Latosporites rotundus n. sp., Verrucatosporites minutiverrucatus n. sp., Extrapunctatosporis pseudomiocaenicus n. sp., E. fayumensis n. sp., Cupressacites africanus n. sp., Triatriopollenites fayumensis n. sp., Monosulcites aegyptianus n. sp., Quercoidites punctatus n. sp., Tricolpopollenites chagrenatus n. sp., T. aequatoripunctatus n. sp., T. lanceolatus n. sp., T. pseudoasper n. sp., Rutaceoipollenites subtropicus n. sp., Rhoipites rotundus n. sp. and Tetracolporopollenites globosus n. sp. Several species had to be described and provisionally named in open nomenclature: Extrapunctatosporis sp. a, E. sp. b, E. sp. c, Graminidites sp. a, G. sp. b, Cycadopites sp. a, C sp. b,. Tricolpites sp. a, T. sp. b, T. sp. c, Polycolpites sp. a, P. sp. b, Rhoipites sp. a, R. sp. b and R. sp.c. From the rest of the assemblage 34 species could be referred to previously described taxa supporting a Late Eocene to Early Oligocene age as it was already concluded from the remains of calcareous nannoplankton as well as fossil invertebrates and vertebrates. A good deal of the identified palynomorphs relates to known plant families and in some cases even to the genera. From this and more geologic evidence a former vegetation in the vicinity and reaches of a prograding delta front, either growing on the natural levees or in back swamps and marshes, could be delineated.
URI: http://hdl.handle.net/10069/16597
ISSN: 02871319
Type: Departmental Bulletin Paper
Text Version: publisher
Appears in Collections:Volume 29, No. 2

Citable URI : http://hdl.handle.net/10069/16597

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