Bu Hashish Formation: Late/Upper Oligocene, Libya
List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
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unclassified
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Echinolampus crameri
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Echinoidea
- Clypeasteroida
- Clypeasteridae
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Clypeaster biarritzensis
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Echinoidea
- Clypeasteroida
- Astriclypeidae
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Amphiope sp.
Agassiz 1840
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Echinoidea
- Clypeasteroida
- Scutellidae
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Scutella chiesai
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Bivalvia
- Ostreida
- Ostreidae
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Crassostrea cf. gryphoides
(Schlotheim 1813)
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Bivalvia
- Pectinida
- Pectinidae
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Pecten sp.
Müller 1776
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Bivalvia
- Carditida
- Carditidae
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Cardita sp.
Bruguière 1792
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Gastropoda
- Turritellidae
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Turritella cf. distincta
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Nummulitidae
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Nummulites fichteli
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| see common names | |||||||
Geography
| Country: | Libya |
| Coordinates: | 30.2° North, 17.2° East (view map) |
| Paleocoordinates: | 28.2° North, 15.1° East |
| Basis of coordinate: | stated in text |
| Geographic resolution: | basin |
Time
| Period: | Paleogene | Epoch: | Oligocene |
| Stage: | Chattian | 10 m.y. bin: | Cenozoic 4 |
| Key time interval: | Late/Upper Oligocene | ||
| Age range of interval: | 27.82000 - 23.03000 m.y. ago |
Stratigraphy
| Formation: | Bu Hashish | ||||
| Stratigraphic resolution: | member | ||||
| Stratigraphy comments: LITHOSTRATIGRAPHIC RELATIONSHIPS: From the Dur Bu Hashish Fm, which overlies the Umm ad Dahiy Fm (Rupelian) and is unconformably overlain by the Al Khums Fm. AGE: Late Oligocene, on the basis of microfossil and macrofossil biostratigraphy. THICKNESS: averages 40 m across its range. | |||||
Lithology and environment
| Primary lithology: | shelly/skeletal,green poorly lithified "shale" |
| Secondary lithology: | white poorly lithified dolomite |
| Includes fossils? | Y |
| Includes fossils? | Y |
| Lithology description: GENERAL LITHOLOGY: Green shale with soft fossiliferous limestone intercalations, and whitish soft, and vacuolar-coquinoid dolomite. LITHIFICATION: Poorly lithified, 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: | 77253 | ||
| Authorizer: | A. Hendy | Enterer: | A. Hendy | Research group: | marine invertebrate |
| Created: | 2008-01-07 07:56:18 | Last modified: | 2013-11-25 13:37:23 |
| Access level: | the public | Released: | 2008-01-07 07:56:17 |
| 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] |