Lothagam-Muruongori Mb: Zanclean, Kenya
List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
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Cladistia
- Polypteriformes
- Polypteridae
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Polypterus sp.
Lacépède 1803
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11 specimens | |||||||||
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Actinopteri
- Cichliformes
- Cichlidae
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Tilapiini indet.
Carnevale et al. 2003
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3 specimens | |||||||||
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Actinopteri
- Tetraodontiformes
- Tetraodontidae
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Tetraodon sp. n. sp.
Linnaeus 1758
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1 specimen | |||||||||
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Actinopteri
- Perciformes
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Perciformes indet.
Bleeker 1859
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6 specimens | |||||||||
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Percoidei indet.
(Bleeker 1859)
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5 specimens | |||||||||
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unclassified
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Hyperopisus sp.
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2 specimens | |||||||||
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Mormyriformes indet.
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1 specimen | |||||||||
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Labeo sp.
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1 specimen | |||||||||
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Sindacharax deserti
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34 specimens | |||||||||
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Sindacharax greenwoodi
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12 specimens | |||||||||
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Sindacharax sp.
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107 specimens | |||||||||
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Semlikiichthys cf. rhachirhinchus
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4 specimens | |||||||||
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Actinopteri
- Cypriniformes
- Cyprinidae
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Cyprinidae indet.
Rafinesque 1815
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3 specimens | |||||||||
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Actinopteri
- Characiformes
- Alestidae
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Hydrocynus sp.
Cuvier 1816
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31 specimens | |||||||||
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Actinopteri
- Characiformes
- Characidae
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Characidae indet.
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2 specimens | |||||||||
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Actinopteri
- Siluriformes
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Siluriformes indet.
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4 specimens | |||||||||
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Actinopteri
- Siluriformes
- Mochokidae
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Synodontis sp.
Cuvier 1816
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1 specimen | |||||||||
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Actinopteri
- Osteoglossiformes
- Osteoglossidae
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Heterotis sp.
Rüppell 1828
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3 specimens | |||||||||
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Actinopteri
- Osteoglossiformes
- Gymnarchidae
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Gymnarchus sp.
Cuvier 1829
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2 specimens | |||||||||
| see common names | ||||||||||
Geography
| Country: | Kenya |
| Coordinates: | 2.9° North, 36.1° East (view map) |
| Paleocoordinates: | 2.7° North, 35.6° East |
| Basis of coordinate: | stated in text |
| Geographic resolution: | local area |
Time
| Period: | Neogene | Epoch: | Pliocene |
| Stage: | Zanclean | 10 m.y. bin: | Cenozoic 6 |
| *Period: | Tertiary | ||
| *International age/stage: | Tortonian - Piacenzian | ||
| Key time interval: | Zanclean | ||
| Age range of interval: | 5.333 - 3.6 m.y. ago | ||
| * legacy (obsolete) database fields | |||
Stratigraphy
| Formation: | Nachukui | Member: | Muruongori | ||
| Stratigraphic resolution: | member | ||||
| Stratigraphy comments: K-Ar dating of the Lothagam basalt places the base of the Muruongori Mb at 4.20+/- 0.03 Ma. The top of the Muruongori is not radiometrically dated, but is estimated to be 3.9 Ma (ref 8636, p. 58). | |||||
Lithology and environment
| Primary lithology: | diatomaceous poorly lithified sandy claystone | ||
| Includes fossils? | Y | ||
| Lithology description: Muruongori Mb is composed primarliy of claystones and recrystallized diatomites, with some sands and molluscan coquinas. (ref 8636, p. 24). | |||
| Environment: | fluvial-lacustrine indet. | Tectonic setting: | rift |
| Geology comments: The Muruongori member represents the Lonyumun Lake, and deposits are very similar to Lonyumun Lake strats throughout the Turkana basin. | |||
Taphonomy
| Modes of preservation: | body |
| Degree of concentration: | dispersed |
| Size of fossils: | macrofossils,mesofossils |
| Spatial orientation: | random |
| Preservation of anatomical detail: | medium |
| Articulated whole bodies: | none |
| Associated major elements: | none |
| Disassociated major elements: | many |
| Disassociated minor elements: | many |
| Size sorting: | poor |
| Fragmentation: | frequent |
Collection methods and comments
| Collection excludes: | some macrofossils |
| Collection methods: | bulk,surface (in situ),mechanical,sieve,field collection |
| Collection size: | 233 specimens |
| Reason for describing collection: | paleoecologic analysis |
| Collection method comments: Held at the Kenya National Museums, Nairobi. Many fish specimens not yet accessioned nd are organized by original field numbers. | |
Metadata
| Also known as: | Nachukui Formation, Muruongori Member | ||
| Database number: | 22240 | ||
| Authorizer: | A. Behrensmeyer | Enterer: | A. Behrensmeyer, S. Cote |
| Modifier: | G. Varnham | Research group: | vertebrate |
| Created: | 1999-06-30 00:00:00 | Last modified: | 2022-04-26 08:38:11 |
| Access level: | the public | Released: | 1999-06-30 00:00:00 |
| Creative Commons license: | CC BY | ||
Reference information
Primary reference:
| 8636. | ETE | M. G. Leakey and J. M. Harris. 2003. Lothagam: the dawn of humanity in eastern Africa. Lothagam: the dawn of humanity in eastern Africa 678 [A. Behrensmeyer/R. Bobe/R. Bobe] |
Secondary references:
| 5448 | ETE 1183 | M. G. Leakey and C. Feibel. 1996. Lothagam: a record of faunal change in the late Miocene of East Africa. Journal of Vertebrate Paleontology 16(3):556-570 [A. Behrensmeyer/A. Behrensmeyer/J. Alroy] |