M-8a, Cerro Buque [Chilcatay Fm]: Burdigalian, Peru
List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
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Chondrichthyes
- Lamniformes
- Lamnidae
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Carcharocles chubutensis
(Agassiz 1839)
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Isurus desori
Sismonda 1849
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| see common names | |||||||
Geography
| Country: | Peru |
| Coordinates: | 14.6° South, 75.7° West (view map) |
| Paleocoordinates: | 13.8° South, 71.1° West (Wright 2013) |
| Basis of coordinate: | stated in text |
| Geographic resolution: | outcrop |
Time
| Period: | Neogene | Epoch: | Miocene |
| Stage: | Burdigalian | 10 m.y. bin: | Cenozoic 5 |
| Key time interval: | Burdigalian | ||
| Age range of interval: | 20.44 - 15.98 m.y. ago |
Stratigraphy
| Formation: | Chilcatay | ||||
| Local section: | Cerro Buque column 1 | Local bed: | 12 m | ||
| Local order: | bottom to top | ||||
| Stratigraphic resolution: | bed | ||||
| Stratigraphy comments: Originally Early Miocene
STRATIGRAPHIC RELATIONS: From the Chilcatay Fm, which regionally, is unconformably overlain by the Pisco Fm (Middle Miocene). AGE: late Oligocene to early Miocene on the basis of K/Ar dates, siliceous microfossil zonation, and molluscan biostratigraphy supports. Stated in text to be of Early Miocene age. STRATIGRAPHIC POSITION: From middle of section. | |||||
Lithology and environment
| Primary lithology: | silty sandstone |
| Includes fossils? | Y |
| Lithology description: SPECIFIC LITHOLOGY: Silty sandstone. LITHIFICATION: Not stated in text. | |
| Environment: | coastal indet. |
| Geology comments: ENVIRONMENT: Not discussed in text, but appears to be from relatively shallow marine siliciclastic setting. | |
Taphonomy
| Modes of preservation: | body |
| Size of fossils: | macrofossils |
Collection methods and comments
| Collection methods: | field collection |
| Reason for describing collection: | paleoecologic analysis |
| Collection method comments: COLLECTOR: Not stated in text. REPOSITORY: Unknown. | |
| Taxonomic list comments:COVERAGE: Focused on chondrichthyans, but including bivalves and gastropods. NOMENCLATURE: Not an authoritative publication, but with modern nomenclature, and species-resolution taxonomic assignments. | |
Metadata
| Database number: | 113249 | ||
| Authorizer: | A. Hendy | Enterer: | A. Hendy |
| Modifier: | M. Uhen | Research group: | marine invertebrate |
| Created: | 2011-07-24 05:25:30 | Last modified: | 2020-07-22 15:54:19 |
| Access level: | the public | Released: | 2011-07-24 05:25:30 |
| Creative Commons license: | CC BY |
Reference information
Primary reference:
| 36761. | A. Alván, J. Apolín, and C. Chacaltana. 2004. Los dientes de Seláceos (Condrichthyies) y su aplicaión estratigráfica en Las Lomas de Ullujaya (Ica, Perú). XIII Congreso Peruano de Geología. Resúmenes Extendidos 595-598 [A. Hendy/A. Hendy/A. Hendy] |
Secondary references:
| 73128 | G. Bosio, E. Malinverno, A. Collareta, C. Di Celma, A. Gioncada, M. Parente, F. Berra, F. G. Marxf, A. Vertino, M. Urbina, and G. Bianucci. 2020. Strontium Isotope Stratigraphy and the thermophilic fossil fauna from the middle Miocene of the East Pisco Basin (Peru). Journal of South American Earth Sciences 97 [M. Uhen/M. Uhen] |