1. Carreteable Buenavista-Samaria: Late Tithonian, Colombia
collected 1983-1984
List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
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Cephalopoda
- Ammonitida
- Protancyloceratidae
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? Protancyloceras sp.
Spath 1924
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Leptoceras informal sp. 1
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Cephalopoda
- Ammonitida
- Himalayitidae
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Himalayites informal sp. 1
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Himalayites informal sp. 2
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Parodontoceras cf. antilleanum
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| Imlay 1942 | ||||||||||
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Cephalopoda
- Ammonitida
- Neocomitidae
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Substeueroceras cf. koeneni
(Steuer 1897)
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| see common names | ||||||||||
Geography
| Country: | Colombia | State/province: | Meta | County: | Buenavista |
| Coordinates: | 4.2° North, 73.7° West (view map) | ||||
| Paleocoordinates: | 5.2° South, 32.8° West (Wright 2013) | ||||
| Basis of coordinate: | based on nearby landmark | ||||
| Geographic resolution: | local area |
Time
| Period: | Jurassic | Epoch: | Late Jurassic |
| Stage: | Tithonian | 10 m.y. bin: | Jurassic 6 |
| Key time interval: | Late Tithonian | ||
| Age range of interval: | 146.3 - 145 m.y. ago |
Stratigraphy
| Formation: | Brechas de Buenavista | Member: | Upper |
| Stratigraphic resolution: | member |
Lithology and environment
| Primary lithology: | planar lamination,black lithified sandy,calcareous "shale" |
| Secondary lithology: | wavy/flaser/lenticular bedding,fine lithified sandstone |
| Includes fossils? | Y |
| Includes fossils? | Y |
| Lithology description: The member comprises marine rudites (breccias), feldespatic sandstones and siltstones. The fossils occurs on black shales and fine-grained sandstones. The shales have planar or wavy stratification. The sandstones show lenticular or wavy bedding. | |
| Environment: | transition zone/lower shoreface |
| Geology comments: This sequence was deposited in a shallow marine environment, surrounded by a rocky and steep coast. | |
Taphonomy
| Modes of preservation: | mold/impression |
| Size of fossils: | macrofossils |
| Preservation of anatomical detail: | medium |
| Abundance in sediment: | common |
Collection methods and comments
| Collection excludes: | some macrofossils |
| Collection methods: | selective quarrying,field collection |
| Reason for describing collection: | biostratigraphic analysis | Collection dates: | 1983-1984 |
Metadata
| Database number: | 191958 | ||
| Authorizer: | A. Rojas | Enterer: | A. Rojas |
| Modifier: | A. Rojas | ||
| Created: | 2018-02-25 12:10:15 | Last modified: | 2025-02-22 15:12:02 |
| Access level: | authorizer only | Released: | 2020-02-25 12:10:15 |
| Creative Commons license: | CC0 |
Reference information
Primary reference:
| 64836. | J. Dorado Galindo. 1990. Contribucion al Conocimiento de la Estratigrafia de la Formacion Brechas de Buenavista (Limite Jurasico-Cretacico). Region Noroeste de Villavicencio (Meta). Geologia Colombiana (17)7-39 [A. Rojas/A. Rojas] |