Jebel Madar [Nahr Umr Fm]: Early Albian, Oman
collected by Simmons
List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
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Cephalopoda
- Ammonitida
- Knemiceratidae
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Knemiceras dubertreti
Basse 1940
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Orbitolinidae
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Mesorbitolina subconcava
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Hedbergellidae
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Praeglobotruncana sp.
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Lituolida
- Lituolidae
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Lituola sp.
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| see common names | |||||||
Geography
| Country: | Oman |
| Coordinates: | 22.4° North, 58.1° East (view map) |
| Paleocoordinates: | 8.2° South, 45.9° East |
| Basis of coordinate: | based on nearby landmark |
| Geographic resolution: | small collection |
Time
| Period: | Cretaceous | Epoch: | Early Cretaceous |
| Stage: | Albian | 10 m.y. bin: | Cretaceous 4 |
| Key time interval: | Early Albian | ||
| Age range of interval: | 113 - 109.9 m.y. ago |
Stratigraphy
| Geological group: | Wasia | Formation: | Nahr Umr | ||
| Stratigraphic resolution: | bed | ||||
| Stratigraphy comments: STRATIGRAPHIC RELATIONS: From the Nahr Umr Fm, which overlies (unconformably) the Shuaiba Fm (Early Aptian), and is overlain by the Natih Fm (Latest Albian to early Turonian. AGE: Lower to lower Middle Albian, on the basis of ammonite and microfossil biostratigraphy. STRATIGRAPHIC POSITION: From middle part of formation. | |||||
Lithology and environment
| Primary lithology: | lithified calcareous "shale" |
| Includes fossils? | Y |
| Lithology description: SPECIFIC LITHOLOGY: Calcareous shales. LITHIFICATION: Lithified on the basis of figured specimens. | |
| Environment: | coastal indet. |
| Geology comments: ENVIRONMENT: Shallow marine siliciclastic setting. | |
Taphonomy
| Modes of preservation: | cast,mold/impression |
| Size of fossils: | macrofossils |
| Preservation of anatomical detail: | good |
Collection methods and comments
| Collection methods: | field collection |
| Reason for describing collection: | taxonomic analysis |
| Museum repositories: | OUM |
| Collectors: | Simmons |
| Collection method comments: COLLECTOR: M. Simmons. REPOSITORY: Oxford University Museum (OUM). | |
| Taxonomic list comments:COVERAGE: Limited to ammonoidea and foraminifera listed in taxonomic publication. NOMENCLATURE: Authoritative publication, with modern nomenclature and species-level assignments. | |
Metadata
| Database number: | 82358 | ||
| Authorizer: | A. Hendy | Enterer: | A. Hendy |
| Modifier: | A. Hendy | Research group: | marine invertebrate,micropaleontology |
| Created: | 2008-07-26 13:22:58 | Last modified: | 2013-11-25 13:37:23 |
| Access level: | the public | Released: | 2008-07-26 13:22:58 |
| Creative Commons license: | CC BY |
Reference information
Primary reference:
| 27751. | W. J. Kennedy and M. D. Simmons. 1991. Mid-Cretaceous ammonites and associated microfossils from the Central Oman Mountains. Newsletters on Stratigraphy 25(3):127-154 [A. Hendy/A. Hendy] |