Loc. 18 - Gheldeis Fm: Early/Lower Oligocene, Somalia
collected by Facca & Marchesini 1938-1939
List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
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Nummulitidae
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Nummulites intermedius
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Echinoidea
- Clypeasteroida
- Clypeasteridae
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Clypeaster aff. biarritzensis
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Echinoidea
- Spatangoida
- Brissidae
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Brissopsis sp.
Agassiz 1840
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Eupatagus rostratus
d'Archiac 1850
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Echinoidea
- Cidaroida
- Cidaridae
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Cidaris sp.
Leske 1778
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Bivalvia
- Pectinida
- Pectinidae
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Pecten sp.
Müller 1776
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Bivalvia
- Ostreida
- Ostreidae
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Ostrea longirostris
Lamarck 1806
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| synonym of Ostrea roncana | |||||||
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Anthozoa
- Scleractinia
- Actinacididae
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Actinacis cf. delicata
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Anthozoa
- Scleractinia
- Montastraeidae
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Heliastrea irradians
(Milne-Edwards and Haime 1848)
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| recombined as Montastrea irradians | |||||||
| see common names | |||||||
Geography
| Country: | Somalia |
| Coordinates: | 10.4° North, 51.3° East (view map) |
| Paleocoordinates: | 7.5° North, 46.1° East |
| Basis of coordinate: | based on nearby landmark |
| Geographic resolution: | outcrop |
Time
| Period: | Paleogene | Epoch: | Oligocene |
| Stage: | Rupelian | 10 m.y. bin: | Cenozoic 4 |
| Key time interval: | Early/Lower Oligocene | ||
| Age range of interval: | 33.90000 - 27.82000 m.y. ago |
Stratigraphy
| Geological group: | Hafún | Formation: | Gheldeis | ||
| Stratigraphic resolution: | group of beds | ||||
| Stratigraphy comments: STRATIGRAPHIC RELATIONS: From the Gheldeis Fm [enterers usage] of the Hafún Series [group?], and presumably regionally overlies Late Eocene strata and is overlain by the Gianti Fm [enterers usage] (Early Oligocene). AGE: Early Oligocene, equivalent to Stampien and middle Nari according to author on the basis of larger formaniferal and molluscan biostratigraphy. STRATIGRAPHIC POSITION: From unknown position within section. | |||||
Lithology and environment
| Primary lithology: | lithified "limestone" |
| Includes fossils? | Y |
| Lithology description: SPECIFIC LITHOLOGY: Not stated, but presumably limestone like adjacent sections. LITHIFICATION: Lithified on the basis of figured specimens from adjacent beds. | |
| Environment: | shallow subtidal indet. |
| Geology comments: ENVIRONMENT: Shallow subtidal carbonate environment. | |
Taphonomy
| Modes of preservation: | body,cast,mold/impression |
| Size of fossils: | macrofossils |
Collection methods and comments
| Collection excludes: | some genera | ||
| Collection methods: | field collection | ||
| Reason for describing collection: | general faunal/floral analysis | ||
| Collectors: | Facca & Marchesini | Collection dates: | 1938-1939 |
| Collection method comments: COLLECTOR: Collected by G. Facca and E. Marchesini, 1938-1939. REPOSITORY: Museo dell' Istituto Geologico dell' Universitá di Firenze. | |||
| Taxonomic list comments:COVERAGE: Not exhaustive, but limited to characteristic gastropoda, bivalvia, foraminifera, and anthozoa. NOMENCLATURE: Authoritative publication, but with antiquated nomenclature. | |||
Metadata
| Database number: | 78952 | ||
| Authorizer: | A. Hendy | Enterer: | A. Hendy |
| Modifier: | A. Hendy | Research group: | marine invertebrate |
| Created: | 2008-02-19 22:14:08 | Last modified: | 2013-11-25 13:37:23 |
| Access level: | authorizer only | Released: | 2009-02-19 22:14:08 |
| Creative Commons license: | CC BY |
Reference information
Primary reference:
| 26500. | A. Azzaroli. 1958. L'Oligocene e il Miocene della Somalia. Stratigrafia, Tettonica, Paleontologia (Macroforaminferi, Coralli, Molluschi). Palaeontolographia Italica 52:1-142 [A. Hendy/A. Hendy] |