Sirt Basin, Libya (Oligocene of Libya)

Also known as Reef 1600

Where: Libya (29.8° N, 18.1° E: paleocoordinates 26.8° N, 15.3° E)

• coordinate estimated from map

• outcrop-level geographic resolution

When: Umm ad Dahiy Formation, Rupelian (33.9 - 28.1 Ma)

• Age given as Rupelian but many Chattian and lower Miocene corals are also present.

•Rupelian age confirmed by Imam and Galmed (2000).

Environment/lithology: reef, buildup or bioherm; lithified reef rocks

• Thickness of Umm ad Dahiy Fm. in area of reef development is 10-23 m. Upper part with silty claystones, locally with plant fossils.

Preservation: replaced with calcite

Collection methods: Only corals

Primary reference: J. Hladil, J. Otava, and A. Galle. 1991. Oligocene carbonate buildups of the Sirt Basin, Libya. Salem, M.J., Hammuda, O.S., Eliagoubi, B.A. (eds.): The Geology of Libya, Volume 4 1401-1420 [W. Kiessling/W. Kiessling]more details

Purpose of describing collection: paleoecologic analysis

PaleoDB collection 10964: authorized by Wolfgang Kiessling, entered by Wolfgang Kiessling on 08.07.2001, edited by Uta Merkel

Creative Commons license: CC BY (attribution)

Taxonomic list

• Not all taxa were figured
 Scleractinia - Agatheliidae
Agathelia sp. Reuss 1854 stony coral
 Scleractinia - Poritidae
Porites collegniana Michelin 1842 stony coral
 Scleractinia - Astrocoeniidae
Astrocoenia sp. Milne-Edwards and Haime 1848 stony coral
Madracis decaphylla stony coral
 Scleractinia - Acroporidae
Astreopora decaphylla Reuss 1868 stony coral
 Scleractinia - Pocilloporidae
Stylophora parvistella Chevalier 1961 stony coral
Stylophora thirsiformis Michelotti 1847 stony coral
 Scleractinia - Merulinidae
Hydnophora pulchra Michelotti 1871 stony coral
 Scleractinia - Montlivaltiidae
Nerthastraea orbignyi Chevalier 1961 stony coral
 Scleractinia - Faviidae
Stylocora sp. Reuss 1871 stony coral
"Hydnophyllia oligocaenica" = Colpophyllia stony coral
Tarbellastraea sp. Alloiteau 1950 stony coral
Dictyoastraea sp. Michelotti 1871 stony coral
Monticulastraea sp. Duncan 1880 stony coral
Agathiphyllia gregaria Catullo 1852 stony coral
Anisocoenia sp. Reuss 1867 stony coral
Antiguastrea parva stony coral
Antiguastrea hufrahensis n. sp. stony coral
Hladil et al. n.sp.
Defrancia irregularis Defrance 1826 stony coral
 Scleractinia - Mussidae
Leptomussa sp. d'Archiardi 1867 stony coral
 Scleractinia - Heliastraeidae
Heliastrea mellahica, "Athecastraea maradahensis n. sp." = Heliastrea (Athecastraea)
Heliastrea mellahica Gregory 1906 stony coral
Heliastraea mellahica
"Athecastraea maradahensis n. sp." = Heliastrea (Athecastraea) stony coral
Hladil et al. n.sp.
 Scleractinia - Diploastraeidae
"Thegioastraea taurinensis" = Diploastrea taurinensis, "Thegioastraea variabilis" = Diploastrea variabilis
"Thegioastraea taurinensis" = Diploastrea taurinensis d'Achiardi 1868 stony coral
"Thegioastraea variabilis" = Diploastrea variabilis Sismonda 1871 stony coral