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Siamaná Formation

Coordinates: 11°58′00″N 71°22′43″W / 11.96667°N 71.37861°W / 11.96667; -71.37861
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Siamaná Formation
Stratigraphic range: Mid-Late Oligocene
~28–23 Ma
TypeGeological formation
Unit ofCocinetas Basin
UnderliesUitpa Formation
OverliesMacarao Formation
Thickness430 m (1,410 ft)
Lithology
PrimaryConglomerate
OtherLimestone
Location
Coordinates11°58′00″N 71°22′43″W / 11.96667°N 71.37861°W / 11.96667; -71.37861
RegionLa Guajira
 Caribbean region
Country Colombia
Type section
Named forSiamaná
Named byRenz
LocationUribia
Year defined1960
Coordinates11°58′00″N 71°22′43″W / 11.96667°N 71.37861°W / 11.96667; -71.37861
RegionLa Guajira
Country Colombia
Siamaná Formation is located in La Guajira Department
Siamaná Formation

Type locality of the formation in La Guajira

The Siamaná Formation (Spanish: Formación Siamaná, E3s) is a fossiliferous geological formation of the Cocinetas Basin in the northernmost department of La Guajira. The formation consists of conglomerates and limestones. The Siamaná Formation dates to the Paleogene period; Middle to Late Oligocene epoch, corresponding to the Deseadan in the SALMA classification.

Etymology

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The formation was defined by Renz in 1960 and named after the village of Siamaná.[1]

Description

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Lithologies

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The Siamaná Formation consists of conglomerates and thick carbonates.[2]

Stratigraphy and depositional environment

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The Siamaná Formation, with a maximum thickness of 430 metres (1,410 ft), overlies the Macarao Formation and is overlain by the Uitpa Formation. The age has been estimated to be Middle to Late Oligocene, corresponding to the Deseadan in the SALMA classification. The depositional environment has been interpreted as shallow marine.[3]

Petroleum geology

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The Siamaná Formation is a reservoir and seal rock formation in the Guajira Basin.[4]

Fossil content

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Group Fossils Notes
Invertebrates Mimachlamys canalis, Ostrea sp.

See also

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Geology of the Eastern Hills
Cesar-Ranchería Basin
Honda Group
Abanico, Castillo, Chota, Loreto, Soncco, Usme Formations
Tinguiririca fauna

References

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  1. ^ Moreno et al., 2015, p.7
  2. ^ Hendy et al., 2015, p.47
  3. ^ Rodríguez & Londoño, 2002, p.132
  4. ^ ANH, 2010
  5. ^ Hendy et al., 2015, p.50

Bibliography

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Local geology

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  • ANH (2010), Guajira Basin - Colombia Open Round 2010 (PDF), ANH, p. 1, retrieved 2017-08-30
  • Moreno, F.; Hendy, A.J.W.; Quiroz, L.; Hoyos, N.; Jones, D.S.; Zapata, V.; Zapata, S.; Ballen, G.A.; 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, Edwin (2015), "Revised stratigraphy of Neogene strata in the Cocinetas Basin, La Guajira, Colombia" (PDF), Swiss Journal of Palaeontology, 134: 5–43, Bibcode:2015SwJP..134....5M, doi:10.1007/s13358-015-0071-4, retrieved 2017-08-08{{citation}}: CS1 maint: multiple names: authors list (link)
  • Rodríguez, Gabriel; Londoño, Ana Cristina (2002), Mapa geológico del Departamento de La Guajira - 1:250,000, INGEOMINAS, pp. 1–259, retrieved 2017-08-08

Paleontology

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Maps

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  • Zuluaga, Carlos A.; Ochoa, Alberto; Muñoz, Carlos A.; Dorado, Camilo E.; Guerrero, Nathalia M.; Martínez, Ana M.; Medina, Paula A.; Ocampo, Edgar F.; Pinilla and Paula A. Ríos, Bibiana P. Rodríguez, Edward A. Salazar, Vladimir L. Zapata, Alejandro (2008), Plancha 3 - Puerto Estrella - 1:100,000, INGEOMINAS, p. 1, retrieved 2017-06-06{{citation}}: CS1 maint: multiple names: authors list (link)
  • Zuluaga, Carlos A.; Ochoa, Alberto; Muñoz, Carlos A.; Dorado, Camilo E.; Guerrero, Nathalia M.; Martínez, Ana M.; Medina, Paula A.; Ocampo, Edgar F.; Pinilla and Paula A. Ríos, Bibiana P. Rodríguez, Edward A. Salazar, Vladimir L. Zapata, Alejandro (2008), Plancha 5 - Bahía Portete - 1:100,000, INGEOMINAS, p. 1, retrieved 2017-06-06{{citation}}: CS1 maint: multiple names: authors list (link)
  • Zuluaga, Carlos A.; Ochoa, Alberto; Muñoz, Carlos A.; Dorado, Camilo E.; Guerrero, Nathalia M.; Martínez, Ana M.; Medina, Paula A.; Ocampo, Edgar F.; Pinilla and Paula A. Ríos, Bibiana P. Rodríguez, Edward A. Salazar, Vladimir L. Zapata, Alejandro (2008), Plancha 10 - Rancho Grande - 1:100,000, INGEOMINAS, p. 1, retrieved 2017-06-06{{citation}}: CS1 maint: multiple names: authors list (link)
  • Zuluaga, Carlos A.; Ochoa, Alberto; Muñoz, Carlos A.; Dorado, Camilo E.; Guerrero, Nathalia M.; Martínez, Ana M.; Medina, Paula A.; Ocampo, Edgar F.; Pinilla and Paula A. Ríos, Bibiana P. Rodríguez, Edward A. Salazar, Vladimir L. Zapata, Alejandro (2008), Plancha 10bis - Rancho Grande - 1:100,000, INGEOMINAS, p. 1, retrieved 2017-06-06{{citation}}: CS1 maint: multiple names: authors list (link)