Location 7, Madden Basin (Gatuncillo Formation) - Woodring (1957): Late Eocene, Panama
List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
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Gastropoda
- Neritidae
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Velates perversus
(Gmelin 1791)
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| see common names | |||||||
Geography
| Country: | Panama |
| Coordinates: | 9.2° North, 79.6° West (view map) |
| Paleocoordinates: | |
| Basis of coordinate: | estimated from map |
| Geographic resolution: | outcrop |
Time
| Period: | Paleogene | Epoch: | Eocene |
| Stage: | Priabonian | 10 m.y. bin: | Cenozoic 3 |
| Key time interval: | Late Eocene | ||
| Age range of interval: | 37.71 - 33.9 m.y. ago |
Stratigraphy
| Formation: | Gatuncillo | ||||
| Stratigraphic resolution: | bed | ||||
| Stratigraphy comments: Limestone. In Madden basin, the Gatuncillo Formation is overlain by Caimato Formation and overlies Cretaceous basement. The thickness of the foramtion is difficult to estimate, but not more than 300 m. Limestones are extensive. Algal or algal-foraminiferal limestones dominate the upper part of the formation. Other facies include echinoid bearing limestones, soft and coralliferous limestones. Siliciclastic facies dominate the formartion and include fine-grained and sandy strata. | |||||
Lithology and environment
| Primary lithology: | shelly/skeletal lithified "limestone" |
| Includes fossils? | Y |
| Lithology description: Algal or algal-foraminiferal limestones dominate the upper part of the formation. Other facies include echinoid bearing limestones, soft and coralliferous limestones. | |
| Environment: | reef, buildup or bioherm |
| Geology comments: Carbonate facies, including algal and coral-rich limestones. No further paleoenvironmental data. | |
Taphonomy
| Modes of preservation: | body |
| Size of fossils: | macrofossils |
Collection methods and comments
| Collection methods: | selective quarrying,field collection |
| Reason for describing collection: | taxonomic analysis |
| Museum repositories: | USNM |
| Collection method comments: Collected by Thomson and Woodring (1949). Material is also held (but not specified for any specific collection) at Stanford University, Acad. Nat. Sci. Phil., Corenell University, PRI, U. Cal. and Cal. Acad. Sci. | |
| Taxonomic list comments:Exhaustive for gastropoda. | |
Metadata
| Also known as: | USGS 17432, Field #115 | ||
| Database number: | 42485 | ||
| Authorizer: | A. Hendy | Enterer: | A. Hendy |
| Modifier: | A. Hendy | Research group: | marine invertebrate |
| Created: | 2004-07-30 12:22:58 | Last modified: | 2025-02-22 15:12:02 |
| Access level: | the public | Released: | 2004-07-30 12:22:58 |
| Creative Commons license: | CC0 | ||
Reference information
Primary reference:
| 11306. | W. P. Woodring. 1957. Geology and Paleontology of Canal Zone and adjoining parts of Panama. United States Geological Survey Professional Paper 306(A) [A. Miller/A. Hendy/A. Hendy] |