Al Khums Formation: Middle Miocene, Libya
List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
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unclassified
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Illyocypris sp.
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Ostracoda
- Podocopida
- Cyprididae
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Cypridopsis sp.
Brady 1868
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Ostracoda
- Podocopida
- Limnocytheridae
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Paralimnocythere sp.
Carbonnel 1965
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Gastropoda
- Cypraeidae
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Cypraea sp.
Linnaeus 1758
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Gastropoda
- Neogastropoda
- Conidae
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Conus sp.
Linnaeus 1758
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Gastropoda
- Naticidae
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Natica sp.
Scopoli 1777
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Gastropoda
- Turritellidae
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Turritella sp.
Lamarck 1799
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Bivalvia
- Ostreida
- Ostreidae
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Crassostrea sp.
Sacco 1897
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Crassostrea gigensis
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Ostrea frondosa
de Serres 1829
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Bivalvia
- Pectinida
- Limidae
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Lima sp.
Bruguière 1797
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Bivalvia
- Pectinida
- Pectinidae
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Pecten sp.
Müller 1776
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Chlamys sp.
Röding 1798
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Bivalvia
- Cardiida
- Cardiidae
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Cardium sp.
Linnaeus 1758
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Bivalvia
- Cardiida
- Veneridae
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Pitaria sp.
Roemer 1857
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Charales
- Feistiellaceae
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Nitellopsis (Tectochara) sp.
Hy 1889
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unclassified
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Psilochara sp.
Grambast 1959
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Miogypsinoides cf. deharti
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Globorotaliidae
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Globorotalia menardii
(Parker et al. 1865)
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| recombined as Globorotalia (Menardella) menardii | ||||||||||
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Globorotalia praemenardii
Cushman and Stainforth 1945
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| recombined as Globorotalia (Menardella) praemenardii | ||||||||||
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Rotaliidae
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Ammonia beccari
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Elphidiidae
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Elphidium macellum
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Elphidium crispum
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Elphidium flexuosum
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Elphidium minutum
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Tubothalamea
- Miliolida
- Alveolinidae
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Borelis melo
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| SUBSPECIES: B. melo curdica | ||||||||||
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Florideophyceae
- Hapalidiales
- Lithothamniacae
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Lithothamnium sp.
Philippi
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| replaced by Lithothamnion | ||||||||||
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Florideophyceae
- Corallinales
- Lithophyllaceae
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Lithophyllum sp.
Philippi 1837
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| see common names | ||||||||||
Geography
| Country: | Libya |
| Coordinates: | 30.5° North, 13.5° East (view map) |
| Paleocoordinates: | 30.0° North, 12.8° East |
| Basis of coordinate: | stated in text |
| Geographic resolution: | basin |
Time
| Period: | Neogene | Epoch: | Miocene |
| 10 m.y. bin: | Cenozoic 5 | ||
| Key time interval: | Middle Miocene | ||
| Age range of interval: | 15.98000 - 11.63000 m.y. ago |
Stratigraphy
| Formation: | Al Khums | ||||
| Stratigraphic resolution: | formation | ||||
| Stratigraphy comments: LITHOSTRATIGRAPHIC RELATIONSHIPS: From the Al Khums Fm, for which lithostratigraphic relationships are unknown. AGE: Middle Miocene, on the basis of microfossil and macrofossil biostratigraphy. THICKNESS: ranges from 5 to 100 m across its range. | |||||
Lithology and environment
| Primary lithology: | shelly/skeletal,green,yellow poorly lithified marl |
| Secondary lithology: | white poorly lithified "limestone" |
| Includes fossils? | Y |
| Includes fossils? | Y |
| Lithology description: GENERAL LITHOLOGY: Greenish-yellow gypsiferous marls with pelecypods, intercalations of white limestone, occasionally saccaroidal and silicified, and greenish-gray marls. LITHIFICATION: Lithified, assumed on the basis of facies description. | |
| Environment: | lagoonal/restricted shallow subtidal |
| Geology comments: ENVIRONMENT: Shallow neritic environment of deposition with lagoonal facies. | |
Taphonomy
| Modes of preservation: | body |
| Size of fossils: | macrofossils,microfossils |
Collection methods and comments
| Collection methods: | surface (in situ),field collection |
| Reason for describing collection: | biostratigraphic analysis |
| Collection method comments: COLLECTORS: Not stated, possibly multiple collectors. REPOSITORY: Unknown.
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| Taxonomic list comments:COVERAGE: Limited, but including bivalvia, gastropoda, echinoids, algae, and foraminifera. NOMENCLATURE: Somewhat antiquated nomenclature, but identified to species and subgenus resolution. | |
Metadata
| Database number: | 77254 | ||
| Authorizer: | A. Hendy | Enterer: | A. Hendy |
| Modifier: | A. Hendy | Research group: | marine invertebrate |
| Created: | 2008-01-07 08:01:59 | Last modified: | 2013-11-25 13:37:23 |
| Access level: | the public | Released: | 2008-01-07 08:01:59 |
| Creative Commons license: | CC BY |
Reference information
Primary reference:
| 26106. | 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] |