Faldeo Oeste del Cerro Cuadrado: Paleogene, Argentina
collected by Luis B. Cazau
List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
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Cycadopsida
- Cycadales
- Cycadaceae
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Menucoa cazaui
Petriella 1969
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| nov. gen. et sp. (15 measurements) | ||||||||||
| see common names | ||||||||||
Geography
| Country: | Argentina | State/province: | Río Negro |
| Coordinates: | 41.6° South, 67.8° West (view map) | ||
| Paleocoordinates: | 44.1° South, 57.9° West | ||
| Basis of coordinate: | estimated from map |
Time
| Period: | Paleogene |
| 10 m.y. bin: | Cenozoic 1-4 |
| Key time interval: | Paleogene |
| Age range of interval: | 66.00000 - 23.03000 m.y. ago |
Stratigraphy
| Formation: | "Terciaria" | ||||
| Stratigraphy comments: La formación geológica no se especifica (Ver geología) |
Lithology and environment
| Primary lithology: | red lithified claystone |
| Secondary lithology: | brown,yellow lithified sandstone |
| Lithology description: Los troncos están en la sección media de una secesión sedimentaria que comienza con arcillitas rojas, continúa con areniscas pardo-amarillentas y culmina con arcillitas verdes. El conjunto tiene un potencia aproximada de 100 m. Esta formación apoya sobre rocas porfíricas de la Formación Los Menucos (Triásico) y es cubierta por depósitos arcillosos originados por una ingresión marina (Terciario inferior?). | |
| Environment: | terrestrial indet. |
Taphonomy
| Modes of preservation: | permineralized,original cellulose,replaced with silica |
| Size of fossils: | macrofossils |
Collection methods and comments
| Collection methods: | surface (in situ),peel or thin section,survey of museum collection |
| Reason for describing collection: | taxonomic analysis |
| Museum repositories: | MLP |
| Collectors: | Luis B. Cazau |
Metadata
| Database number: | 138338 | ||
| Authorizer: | C. Jaramillo | Enterer: | J. Ceballos |
| Modifier: | P. Santamarina | Research group: | paleobotany |
| Created: | 2013-01-15 01:59:23 | Last modified: | 2013-10-09 13:32:55 |
| Access level: | authorizer only | Released: | 2018-01-15 01:59:23 |
| Creative Commons license: | CC BY |
Reference information
Primary reference:
| 44202. | B. Petriella. 1969. Menucoa cazaui nov. gen. et. sp. tronco petrificado de Cycadales, provincia de Rio Negro, Argentina. Ameghiniana VI(4):291-302 [C. Jaramillo/J. Ceballos/P. Santamarina] |
Secondary references:
| 67984 | R. A. Stockey. 1975. Seeds and Embryos of Araucaria mirabilis. American Journal of Botany 62(8):856-868 [P. Wilf/E. Stiles] |