Ritoque Formation
Ritoque Formation Stratigraphic range: Early Hauterivian ~ | |
---|---|
Type | Geological formation |
Underlies | Paja Formation |
Overlies | Rosablanca Fm., Arcabuco Fm. |
Thickness | 70–110 m (230–360 ft) |
Lithology | |
Primary | Siltstone |
Other | Limestone |
Location | |
Coordinates | 4°27′07″N 74°03′20″W / 4.45194°N 74.05556°WCoordinates: 4°27′07″N 74°03′20″W / 4.45194°N 74.05556°W |
Region | Altiplano Cundiboyacense Eastern Ranges, Andes |
Country | Colombia |
Type section | |
Named for | Vereda Ritoque, Villa de Leyva |
Named by | Etayo |
Location | Villa de Leyva |
Year defined | 1968 |
Coordinates | 4°27′07″N 74°03′20″W / 4.45194°N 74.05556°W |
Region | Boyacá, Santander |
Country | Colombia |
The Ritoque Formation (Spanish: Formación Ritoque, Kiri, Kirt) is a geological formation of the Altiplano Cundiboyacense, Eastern Ranges of the Colombian Andes. The formation consists of grey siltstones, limestones and fine sandstones intercalated. The formation dates to the Early Cretaceous period; Early Hauterivian epoch and varies in thickness between 70 and 110 metres (230 and 360 ft).
Definition[]
The formation was first defined and named by Etayo in 1968 after the vereda Ritoque of Villa de Leyva.[1]
Description[]
Lithologies[]
The Ritoque Formation is characterised by a sequence of grey siltstones, limestones and sandstones with a thickness between 70 and 110 metres (230 and 360 ft).[1]
Stratigraphy and depositional environment[]
The Ritoque Formation overlies the Rosablanca and Arcabuco Formations and is overlain by the Paja Formation. The age has been estimated to be Early Hauterivian. Stratigraphically, the formation is time equivalent with the Macanal Formation.[2]
Outcrops[]
The Ritoque Formation is found, apart from its type locality near Villa de Leyva, Boyacá, found in the vicinity.
Regional correlations[]
Age | Paleomap | VMM | Guaduas-Vélez | W Emerald Belt | Villeta anticlinal | Chiquinquirá- Arcabuco |
Tunja- Duitama |
Altiplano Cundiboyacense | El Cocuy | ||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Maastrichtian | eroded | Guaduas | |||||||||||
Guadalupe | |||||||||||||
Campanian | |||||||||||||
Oliní | |||||||||||||
Santonian | - | ||||||||||||
Coniacian | Oliní | Conejo | Chipaque | ||||||||||
Loma Gorda | undefined | La Frontera | |||||||||||
Turonian | Hondita | La Frontera | |||||||||||
Cenomanian | hiatus | Simijaca | |||||||||||
Pacho Fm. | Hiló - Pacho | Une | |||||||||||
Albian | Hiló | Une | |||||||||||
Capotes - - | |||||||||||||
Aptian | Capotes | Socotá - El Peñón | Paja | Fómeque | |||||||||
Paja | Paja | El Peñón | Trincheras | ||||||||||
La Naveta | |||||||||||||
Barremian | |||||||||||||
Hauterivian | Las Juntas | ||||||||||||
Rosablanca | Ritoque | ||||||||||||
Valanginian | Ritoque | - Murca | Rosablanca | hiatus | Macanal | ||||||||
Rosablanca | |||||||||||||
Berriasian | Guavio | ||||||||||||
Arcabuco | |||||||||||||
Sources |
See also[]
- Geology of the Eastern Hills
- Geology of the Ocetá Páramo
- Geology of the Altiplano Cundiboyacense
References[]
Bibliography[]
- Contribución en la determinación de los posibles paleoambientes de las rocas Cretáceas Tempranas sobre la vía Tunja-Villa de Leyva (entre Alto del Arrayán - Peaje Sáchica) y sectores aledaños, departamento de Boyacá (BSc. thesis), 1–127. Universidad de Caldas. Accessed 2019-03-10. , and . 2009.
- A new species of Diaulax Bell, 1863 (Brachyura: Dialucidae) in the Early Cretaceous of the Rosablanca Formation, Colombia. Boletín de la Sociedad Geológica Mexicana 67. 103-112. Accessed 2017-04-04. ; , and . 2015.
- Society for Sedimentary Geology (SEPM). . 2012. Chronology Relative Sea Level History and a New Sequence Stratigraphic Model for Basinal Cretaceous Facies of Colombia, 161–216.
Maps[]
- Plancha 151 - Charalá - 1:100,000, 1. INGEOMINAS. Accessed 2017-06-06. . 2009.
- Plancha 170 - Vélez - 1:100,000, 1. INGEOMINAS. Accessed 2017-06-06. , and . 2009.
- Plancha 171 - Duitama - 1:100,000, 1. INGEOMINAS. Accessed 2017-06-06. , and . 2009.
- Plancha 190 - Chiquinquirá - 1:100,000, 1. INGEOMINAS. Accessed 2017-06-06. , and . 2009.
- Plancha 191 - Tunja - 1:100,000, 1. INGEOMINAS. Accessed 2017-06-06. ; , and . 1998.
External links[]
- Plancha 5-09 del Atlas Geológico de Colombia 2015 – escala 1:500,000, 1. Servicio Geológico Colombiano. Accessed 2017-03-16. ; ; , and . 2015.
- Geologic formations of Colombia
- Cretaceous Colombia
- Lower Cretaceous Series of South America
- Hauterivian Stage
- Siltstone formations
- Limestone formations
- Shallow marine deposits
- Altiplano Cundiboyacense
- Geography of Boyacá Department