2015 GSA Annual Meeting in Baltimore, Maryland, USA (1-4 November 2015)

Paper No. 249-3
Presentation Time: 2:00 PM


KHAMEISS, Belkasim, Department of Geological Sciences, Ball State University, Fine Arts Building (AR), room 117 Muncie, IN 47306, muncie, IN 47304, HOYT, William H., Earth Sciences, Univ of Northern Colorado, Greeley, CO 80639, EL EBAIDI, Saad K., University of Benghazi, Department of Earth Sciences, P.O. Box 9480, Benghazi, Libya, MUFTAH, Ahmed M., University of Benghazi, Department of Earth Sciences, Benghazi, Libya, KLAUS, James S., Department of Geological Sciences, University of Miami, 1301 Memorial Drive, Coral Gables, FL 33146 and BUDD, Ann F., Department of Earth and Environmental Sciences, University of Iowa, 115 Trowbridge Hall, Iowa City, IA 52242, bkb28_1981@yahoo.com

Corals studies in Libya are very limited, although they play an important role in the oil exploration as they form excellent reservoirs of coral reef buildups at some oil fields of Sirt Basin (e.g. Intisar “Idris” and Sahabi Fields). Both fields are producing from Paleocene coral reefs. Meanwhile, in Cyrenaica corals are of less importance as they are not reported in subsurface Tertiary rocks, which probably to the environmental settings of these sediments out of the core of reef as occurred in the surface. Meanwhile, corals are reported from older (Jurassic) subsurface successions as in Concession NC-152, but the cementation diagenesis led to blocking and destroying the porosity. This study presents the first surface documentation work of eight scleractinian coral species from the exposed sediments in northern Libya, where six taxa reported from Al Jabal al Akhdar region, these include a) an association of huge colonies of Caulastreasp. and Stylophorasp., from the Middle Eocene Darnah Formation at West Darnah roadcut section. The co-existence of the fastCaulastrea sp. with the slow Stylophorasp. is due to the competition strategy; b) Antiguastrea? sp. is reportedfrom the Oligocene Algal Limestone of Al Bayda Formation at Daryanah – Abyar roadcut section; c) Cyphastreasp. and Aleveoporasp. from Oligo-Miocene AlFaidiyah Formation at Al Fatayah cement quarry and d) Tarbellastraeasp. from Middle Miocene Benghazi Formation at Benghazi cement Quarry. In addition to, two species Astraeaoporasp. and Actinacis paroraiare reported from the Upper Miocene sediments of formation "M" in As Sahabi area.