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Abstract Detail


Paleobotanical Section

Pan, Aaron [1], Jacobs, Bonnie [2], Tabor, Neil J. [1].

The Late Oligocene (28 27 Myr) Guang River flora of northwestern Ethiopia.

THE Guang River flora is a well preserved Late Oligocene (28 27 Myr) compression macrofossil assemblage from northwestern Ethiopia. Fossils include leaves, reproductive structures, carbonized wood, and pollen. The flora is preserved in an overbank deposit and based on taxonomic identification, lateral heterogeneity, sedimentology, and leaf morphology, the flora represents a tropical moist forest community. Taxa include Eremospatha (Arecaceae), Hyphaene (Arecaceae), Manilkara/Mimusops (Sapotaceae), cf. Sorindeia (Anacardiaceae), Cola (Malvaceae sensu lato), Dioscorea (Dioscoreaceae), two species of Detarieae legumes (Leguminosae/Fabaceae), and Strychnos (Loganiaceae), which taken together indicate the flora likely represents a forest that may have been periodically or seasonally inundated. Eremospatha, Dioscorea, and Strychnos, the presence of charcoalified logs, and in situ stumps indicate that this forest may represent a successional or secondary community.


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1 - Southern Methodist University, Department of Geological Sciences, P.O. Box 750395, Dallas, Texas, 75275-0395, USA
2 - Southern Methodist University, Environmental Science Progrm, P.O. Box 750395, Dallas, Texas, 75275, USA

Keywords:
Forest
Dioscorea
Eremospatha
Leguminosae
Africa
Ethiopia
Paleogene.

Presentation Type: Oral Paper:Papers for Sections
Session: 17-13
Location: 266/Holt
Date: Monday, July 31st, 2006
Time: 4:30 PM
Abstract ID:250


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