Qararat Al Jifah Member, Wadi Thamat Formation (Eocene of Libya)

Where: Libya (30.0° N, 17.7° E: paleocoordinates 25.8° N, 14.2° E)

• coordinate stated in text

• basin-level geographic resolution

When: Qararat Al Jifah Member (Wadi Thamat Formation), Priabonian (38.0 - 33.9 Ma)

• LITHOSTRATIGRAPHIC RELATIONSHIPS: From the Qararat Al Jifah Mbr of the Wadi Thamat Fm, which overlies the Thmed Al Qusur (Priabonian) and is overlain by the Umm ad Dahiy Fm (Rupelian). AGE: Priabonian, on the basis of microfossil and macrofossil biostratigraphy. THICKNESS: averages 128 m across its range.

• member-level stratigraphic resolution

Environment/lithology: lithified, shelly/skeletal, brown, white, yellow limestone and lithified, gypsiferous, green, yellow, argillaceous marl

• ENVIRONMENT: Shallow marine carbonate.
• GENERAL LITHOLOGY: Light yellow to creamy white organodetrital limestone, alternating with subordinate greenish yellow clay-marls, occasionally gypsiferous. LITHIFICATION: Lithified, not stated, but apparent from facies description.

Size classes: macrofossils, microfossils

Collection methods: surface (in situ),

• COLLECTORS: Not stated, possibly multiple collectors. REPOSITORY: Unknown.

Primary reference: M. F. Megerisi and V. D. Mamgain. 1980. The Upper Cretaceous-Tertiary Formations of northern Libya: a synthesis. Department of Geological Researches and Mining Bulletin 12:1-85 [A. Hendy/A. Hendy]more details

Purpose of describing collection: biostratigraphic analysis

PaleoDB collection 77237: authorized by Austin Hendy, entered by Austin Hendy on 06.01.2008, edited by Wolfgang Kiessling

Creative Commons license: CC BY (attribution)

Taxonomic list

• COVERAGE: Limited, but including bivalvia, gastropoda, echinoids, algae, and foraminifera. NOMENCLATURE: Somewhat antiquated nomenclature, but identified to species and subgenus resolution.
unclassified
  -
Nodosariata
 Nodosariida - Nodosariidae
 Polymorphinida - Polymorphinidae
Globothalamea
 Rotaliida - Discorbidae
 Rotaliida - Cibicididae
Cibicides sp. Monfort 1808
 Rotaliida - Nonionidae
Nonionella sp. Cushman 1926
Foraminifera
 Rotalioidea - Elphidiidae
Elphidium sp. Monfort 1808
 Lituolida - Lituolidae
Clavulina sp. d'Orbigny 1826
 Textulariina - Tritaxiidae
Tubothalamea
 Miliolida - Hauerinidae
Quinqueloculina sp. d'Orbigny 1826
Foraminifera
 Buliminacea - Siphogenerinoididae
Sagrina sp. d'Orbigny 1839
 Rotaliacea - Rotaliidae
Gastropoda
 Sorbeoconcha - Strombidae
"Rostellaria mokattomensis" = Tibia
"Rostellaria mokattomensis" = Tibia true conch
Bivalvia
 Pectinida - Anomiidae
Carolia placunoides Cantraine 1838 scallop
 Ostreida - Malleidae
 Ostreida - Gryphaeidae
"Ostrea exogyroides" = Praeexogyra dubiensis
"Ostrea exogyroides" = Praeexogyra dubiensis Contejean 1859 oyster
 Ostreida - Ostreidae
"Ostrea multicostata" = Cubitostrea multicostata Deshayes 1832 oyster
Ostrea reili oyster
Ostrea meili oyster
Ostrea cymbula Lamarck 1806 oyster
Ostracoda
 Podocopida - Leguminocythereidae
Leguminocythereis sp. Howe and Law 1936 ostracod
 Podocopida - Hemicytheridae
Hermanites sp. Puri 1955 ostracod
 Podocopida - Bairdiidae
Bairdia sp. M'Coy 1844 ostracod
Echinoidea
 Spatangoida - Schizasteridae
 Echinolampadoida - Echinolampadidae
Echinolampas sp. Gray 1825 sea urchin