Jimol_Formation
The Jimol Formation (Spanish: Formación Jimol, N1j) is a fossiliferous geological formation of the Cocinetas Basin in the northernmost department of La Guajira. The formation consists of calcareous lithic and fossiliferous sandstones, siltstones and mudstones. The Jimol Formation dates to the Neogene period; Burdigalian stage, Santacrucian in the SALMA classification, and has a maximum thickness of 203 metres (666 ft).
| Jimol Formation | |
|---|---|
| Stratigraphic range: Burdigalian (Santacrucian) ~17.9–16.7 Ma | |
| Type | Geological formation |
| Unit of | Cocinetas Basin |
| Underlies | Castilletes Formation |
| Overlies | Uitpa Formation |
| Thickness | up to 203 m (666 ft) |
| Lithology | |
| Primary | Sandstone |
| Other | Siltstone, mudstone |
| Location | |
| Coordinates | 11°58′00″N 71°22′43″W |
| Region | La Guajira Caribbean region |
| Country |  Colombia |
| Type section | |
| Named for | Cerro Jimol |
| Named by | Renz |
| Location | Uribia |
| Year defined | 1960 |
| Coordinates | 11°58′00″N 71°22′43″W |
| Region | La Guajira |
| Country | Colombia |
Type locality of the formation in La Guajira | |
The formation was defined by Renz in 1960 and named after Cerro Jimol.[1]
Lithologies
The Jimol Formation consists of calcareous lithic and fossiliferous sandstones, siltstones and mudstones.[2]
Stratigraphy and depositional environment
The Jimol Formation overlies the Uitpa Formation and is overlain by the Castilletes Formation. The age has been estimated to be Early Miocene (17.9 to 16.7 Ma), corresponding to the Santacrucian in the SALMA classification. The invertebrate fauna of the Jimol Formation is similar to the fauna found in the latest Early Miocene Cantaure Formation of Venezuela and the Culebra Formation of Panama.[3] The Jimol Formation was deposited in a beach to shallow marine environment,[4] inner shelf depth (less than 50 metres' [160 ft] water depth). This unit is correlated with the upper Agua Clara and lower Cerro Pelao Formations of the Venezuelan Falcón Basin.[5]
Petroleum geology
The Jimol Formation is a reservoir and seal rock formation in the Guajira Basin.[6]
Fossil content
- Moreno et al., 2015, p.7
- Moreno et al., 2015, pp.18-27
- Moreno et al., 2015, p.23
- Rodríguez & Londoño, 2002, p.137
- Moreno et al., 2015, p.27
- ANH, 2010
- Moreno et al., 2015, p.35
- Aguilera et al., 2017, p.15
- Hendy et al., 2015, p.52
- Hendy et al., 2015, p.53
- Hendy et al., 2015, p.54
Bibliography
Local geology
- ANH, .. 2010. Guajira Basin - Colombia Open Round 2010, 1. ANH. Accessed 2017-08-30.
- Moreno, F.; A.J.W. Hendy; L. Quiroz; N. Hoyos; D.S. Jones; V. Zapata; S. Zapata; G.A. Ballen, and Edwin Cadena, A.L. Cárdenas, J.D. Carrillo Briceño, J.D. Carrillo, D. Delgado Sierra, J. Escobar, J.I. Martínez, C. Martínez, C. Montes, J. Moreno, N. Pérez, R. Sánchez, C. Suárez, M.C. Vallejo Pareja, C. Jaramillo. 2015. Revised stratigraphy of Neogene strata in the Cocinetas Basin, La Guajira, Colombia. Swiss Journal of Palaeontology 134. 5–43. Accessed 2017-08-08.
- Rodríguez, Gabriel, and Ana Cristina Londoño. 2002. Mapa geológico del Departamento de La Guajira - 1:250,000, 1–259. INGEOMINAS. Accessed 2017-08-08.
Paleontology
- Aguilera, Órangel; Guilherme Oliveira Andrade Silva; Ricardo Tadeu Lopes; Alessandra Silveira Machado; Thaís Maria Dos Santos; Gabriela Marques; Thayse Bertucci; Thayanne Aguiar, and Jorge Carrillo Briceño and Felix Rodríguez, Carlos Jaramillo. 2017. Neogene Proto-Caribbean porcupinefishes (Diodontidae). PLoS ONE 12(7). 1–26. Accessed 2019-02-09.
- Hendy, Austin J.W.; Douglas S. Jones; Federico Moreno; Vladimir Zapata, and Carlos Jaramillo. 2015. Neogene molluscs, shallow marine paleoenvironments, and chronostratigraphy of the Guajira Peninsula, Colombia. Swiss Journal of Palaeontology 134. 45–75. Accessed 2017-08-08.
Maps
- Zuluaga, Carlos A.; Alberto Ochoa; Carlos A. Muñoz; Camilo E. Dorado; Nathalia M. Guerrero; Ana M. Martínez; Paula A. Medina; Edgar F. Ocampo, and Alejandro Pinilla and Paula A. Ríos, Bibiana P. Rodríguez, Edward A. Salazar, Vladimir L. Zapata. 2008. Plancha 3 - Puerto Estrella - 1:100,000, 1. INGEOMINAS. Accessed 2017-06-06.
- Zuluaga, Carlos A.; Alberto Ochoa; Carlos A. Muñoz; Camilo E. Dorado; Nathalia M. Guerrero; Ana M. Martínez; Paula A. Medina; Edgar F. Ocampo, and Alejandro Pinilla and Paula A. Ríos, Bibiana P. Rodríguez, Edward A. Salazar, Vladimir L. Zapata. 2008. Plancha 5 - Bahía Portete - 1:100,000, 1. INGEOMINAS. Accessed 2017-06-06.
- Zuluaga, Carlos A.; Alberto Ochoa; Carlos A. Muñoz; Camilo E. Dorado; Nathalia M. Guerrero; Ana M. Martínez; Paula A. Medina; Edgar F. Ocampo, and Alejandro Pinilla and Paula A. Ríos, Bibiana P. Rodríguez, Edward A. Salazar, Vladimir L. Zapata. 2008. Plancha 10 - Rancho Grande - 1:100,000, 1. INGEOMINAS. Accessed 2017-06-06.
- Zuluaga, Carlos A.; Alberto Ochoa; Carlos A. Muñoz; Camilo E. Dorado; Nathalia M. Guerrero; Ana M. Martínez; Paula A. Medina; Edgar F. Ocampo, and Alejandro Pinilla and Paula A. Ríos, Bibiana P. Rodríguez, Edward A. Salazar, Vladimir L. Zapata. 2008. Plancha 10bis - Rancho Grande - 1:100,000, 1. INGEOMINAS. Accessed 2017-06-06.