R Lameiros Section
Location Occurrences
Occurrences
| VS | Scientific Name | Archipelago | Island | Location | Min/Max Age |
|---|
Stratigraphy Data
| Designation | Lameiros Section |
| Status | Accepted |
| Parent Strata | Cenozoic |
| Unit Type | Lithostratigraphy |
| Scope | Local |
| Max Thickness (m) | 8 |
| Description | Characterised by marine sedimentary rocks, it outcrops on the right bank of the Ribeira de São Vicente, in Corgo do Barrinho, around 300-450 m above current sea level. Recent 40Ar/39Ar dating of the underlying volcanic sequence places it at an age of less than 6.5-7.0 Ma, compatible with biostratigraphy based on nannofossils, which determined an age for these fossiliferous deposits between the Upper Miocene and the Lower Pliocene, Tortonian-Zanclian. Historically, it was the limestones where subject to limestone extraction and the surrounding area (including two old quarries), that have been integrated into the Museological Centre - Rota da Cal. It is very likely that the fossil material mentioned in the historical literature concerning the oldest marine deposits on Madeira Island comes from this area (Teixeira, 1948: 197, late Miocene - Vindobonian; Ferreira, 1961: 540, São Vicente and Helvecian of Madeira Island). However, it has not been possible to locate much of this historical material in national and European collections (e.g. Pereira, 2010). |
| Top - Base Age (Ma) | 3.6 - 11.63 |
| Chronostratigraphy - min age | Tortonian |
| Chronostratigraphy - max age | Zanclean |
| Dating_max | 7 |
| Dating_min | 6.5 |
| Dating method | Argon-argon |
| Dating_material | Basalt |
| Stratigraphy verification status | Trusted |
| Added by | Madeira, P. |
| Added date | 2024-06-26 15:37:47 |
References
Age Reference
Ramalho, R. S., Brum da Silveira, A., Fonseca, P. E., Madeira, J., Cosca, M., Cachão, M., Fonseca, M. M., & Prada, S. N. (2015). The emergence of volcanic oceanic islands on a slow-moving plate: The example of Madeira Island, NE Atlantic. 522–537. Geochemistry, Geophysics, Geosystems. 16. 2. https://doi.org/10.1002/2014GC005657.
Stratigraphy After
Ramalho, R. S., Brum da Silveira, A., Fonseca, P. E., Madeira, J., Cosca, M., Cachão, M., Fonseca, M. M., & Prada, S. N. (2015). The emergence of volcanic oceanic islands on a slow-moving plate: The example of Madeira Island, NE Atlantic. 522–537. Geochemistry, Geophysics, Geosystems. 16. 2. https://doi.org/10.1002/2014GC005657.
Dating Reference
Ramalho, R. S., Brum da Silveira, A., Fonseca, P. E., Madeira, J., Cosca, M., Cachão, M., Fonseca, M. M., & Prada, S. N. (2015). The emergence of volcanic oceanic islands on a slow-moving plate: The example of Madeira Island, NE Atlantic. 522–537. Geochemistry, Geophysics, Geosystems. 16. 2. https://doi.org/10.1002/2014GC005657.
Ramalho, R. S., Brum da Silveira, A., Fonseca, P. E., Madeira, J., Cosca, M., Cachão, M., Fonseca, M. M., & Prada, S. N. (2015). The emergence of volcanic oceanic islands on a slow-moving plate: The example of Madeira Island, NE Atlantic. 522–537. Geochemistry, Geophysics, Geosystems. 16. 2. https://doi.org/10.1002/2014GC005657.
Stratigraphy After
Ramalho, R. S., Brum da Silveira, A., Fonseca, P. E., Madeira, J., Cosca, M., Cachão, M., Fonseca, M. M., & Prada, S. N. (2015). The emergence of volcanic oceanic islands on a slow-moving plate: The example of Madeira Island, NE Atlantic. 522–537. Geochemistry, Geophysics, Geosystems. 16. 2. https://doi.org/10.1002/2014GC005657.
Dating Reference
Ramalho, R. S., Brum da Silveira, A., Fonseca, P. E., Madeira, J., Cosca, M., Cachão, M., Fonseca, M. M., & Prada, S. N. (2015). The emergence of volcanic oceanic islands on a slow-moving plate: The example of Madeira Island, NE Atlantic. 522–537. Geochemistry, Geophysics, Geosystems. 16. 2. https://doi.org/10.1002/2014GC005657.