Macarao Formation

{{short description|Geological formation}}

{{Infobox rockunit

| name = Macarao Formation

| period = Priabonian

| age = Mid-Late Eocene
~{{fossil range|40|34}}

| image =

| imagesize =

| caption =

| type = Geological formation

| prilithology = Calcareous sandstone

| otherlithology = Siltstone, gypsum

| unitof = Cocinetas Basin

| subunits =

| underlies = Castilletes Fm., Siamaná Fm.

| overlies = Guaralamai Fm.
Jarara Schist (basement)

| thickness = {{convert|253|m|ft|abbr=on}}

| area =

| map = {{Location map | Colombia La Guajira Department

| relief = 1

| width = 250

| lat_deg = 11.833429

| lon_deg = -71.412812

| float = center

| mark = Orange pog.svg

| marksize = 12

| caption =

}}

| map_caption = Type locality of the formation in La Guajira

| location =

| coordinates = {{coord|11|50|00|N|71|24|46|W|display=inline,title}}

| region = La Guajira
 Caribbean region

| country = Colombia

| extent =

| namedfor =

| namedby = Rollins

| year_ts = 1965

| location_ts = Uribia

| coordinates_ts = {{coord|11|50|00|N|71|24|46|W|display=inline}}

| paleocoordinates_ts =

| region_ts = La Guajira

| country_ts = Colombia

| thickness_ts =

}}

The Macarao Formation ({{langx|es|Formación Macarao}}, E2m) is a geological formation of the Cocinetas Basin in the northernmost Colombian department of La Guajira. The formation consists of foraminifera-rich fine to medium grained calcareous sandstones intercalated with calcareous siltstones, cross-cut by veins of gypsum. The {{convert|253|m|ft}} thick Macarao Formation dates to the Paleogene period; Middle to Late Eocene epoch, corresponding to the Divisaderan in the South American land mammal ages (SALMA).

Definition

The formation was defined by Rollins in 1965.Moreno et al., 2015, p.7

Description

= Lithologies =

The Macarao Formation consists of foraminifera-rich fine to medium grained calcareous sandstones intercalated with calcareous siltstones, cross-cut by veins of gypsum.Plancha 10bis, 2008

= Stratigraphy and depositional environment =

The Macarao Formation has a maximum thickness of {{convert|253|m|ft}} and overlies the Cretaceous Guaramalai Formation and the basement (Jarara Schist) and is overlain by the Siamaná and Castilletes Formations with a high angle unconformity. The age has been estimated to be Middle to Late Eocene, corresponding to the Divisaderan in the South American land mammal ages (SALMA). The formation has been deposited in a shallow marine bay environment.Rodríguez & Londoño, 2002, p.128

= Petroleum geology =

The Macarao Formation is a reservoir rock formation in the Guajira Basin.ANH, 2010

{{clear}}

See also

{{Portal|Colombia|Geology|Paleontology}}

:{{icon|FAC}} Geology of the Eastern Hills

:{{icon|GAN}} Cesar-Ranchería Basin

:{{icon|C}} Bogotá Formation

:{{icon|Start}} Chota, Loreto, Regadera, Soncco, Usme Formations

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References

{{reflist|30em}}

= Bibliography =

  • {{citation |last=ANH |year=2010 |title=Guajira Basin - Colombia Open Round 2010 |url=http://www.anh.gov.co/Informacion-Geologica-y-Geofisica/Estudios-Integrados-y-Modelamientos/Presentaciones%20y%20Poster%20Tcnicos/Guajira%20(pdf)-Ronda%20Colombia%202010.pdf |publisher=ANH |pages=1 |accessdate=2017-08-30}}
  • {{citation |last1=Moreno |first1=F. |last2=Hendy |first2=A.J.W. |last3=Quiroz |first3=L. |last4=Hoyos |first4=N. |last5=Jones |first5=D.S. |last6=Zapata |first6=V. |last7=Zapata |first7=S. |last8=Ballen |first8=G.A. |last9=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 |first9=Edwin |year=2015 |title=Revised stratigraphy of Neogene strata in the Cocinetas Basin, La Guajira, Colombia |url=http://wwwprof.uniandes.edu.co/~cmontes/CamiloMontes/Publications_files/moreno_etal_2015_Guajira__stratigraphy.pdf |journal=Swiss Journal of Palaeontology |volume=134 |issue=1 |pages=5–43 |doi=10.1007/s13358-015-0071-4 |bibcode=2015SwJP..134....5M |accessdate=2017-08-08}}
  • {{citation |last1=Rodríguez |first1=Gabriel |last2=Londoño |first2=Ana Cristina |year=2002 |title=Mapa geológico del Departamento de La Guajira - 1:250,000 |url=https://www.researchgate.net/publication/270882602 |publisher=INGEOMINAS |pages=1–259 |accessdate=2017-08-08}}

== Maps ==

  • {{citation |last1=Zuluaga |first1=Carlos A. |last2=Ochoa |first2=Alberto |last3=Muñoz |first3=Carlos A. |last4=Dorado |first4=Camilo E. |last5=Guerrero |first5=Nathalia M. |last6=Martínez |first6=Ana M. |last7=Medina |first7=Paula A. |last8=Ocampo |first8=Edgar F. |last9=Pinilla and Paula A. Ríos, Bibiana P. Rodríguez, Edward A. Salazar, Vladimir L. Zapata |first9=Alejandro |year=2008 |title=Plancha 3 - Puerto Estrella - 1:100,000 |url=https://drive.google.com/open?id=0BwFQPMJEi17QVk94Yi03VkJxQm8 |publisher=INGEOMINAS |pages=1 |accessdate=2017-06-06}}
  • {{citation |last1=Zuluaga |first1=Carlos A. |last2=Ochoa |first2=Alberto |last3=Muñoz |first3=Carlos A. |last4=Dorado |first4=Camilo E. |last5=Guerrero |first5=Nathalia M. |last6=Martínez |first6=Ana M. |last7=Medina |first7=Paula A. |last8=Ocampo |first8=Edgar F. |last9=Pinilla and Paula A. Ríos, Bibiana P. Rodríguez, Edward A. Salazar, Vladimir L. Zapata |first9=Alejandro |year=2008 |title=Plancha 5 - Bahía Portete - 1:100,000 |url=https://drive.google.com/open?id=0BwFQPMJEi17QbzhZdFA2eXcxdjQ |publisher=INGEOMINAS |pages=1 |accessdate=2017-06-06}}
  • {{citation |last1=Zuluaga |first1=Carlos A. |last2=Ochoa |first2=Alberto |last3=Muñoz |first3=Carlos A. |last4=Dorado |first4=Camilo E. |last5=Guerrero |first5=Nathalia M. |last6=Martínez |first6=Ana M. |last7=Medina |first7=Paula A. |last8=Ocampo |first8=Edgar F. |last9=Pinilla and Paula A. Ríos, Bibiana P. Rodríguez, Edward A. Salazar, Vladimir L. Zapata |first9=Alejandro |year=2008 |title=Plancha 10 - Rancho Grande - 1:100,000 |url=https://drive.google.com/open?id=0BwFQPMJEi17QekhPeU95UXluWmM |publisher=INGEOMINAS |pages=1 |accessdate=2017-06-06}}
  • {{citation |last1=Zuluaga |first1=Carlos A. |last2=Ochoa |first2=Alberto |last3=Muñoz |first3=Carlos A. |last4=Dorado |first4=Camilo E. |last5=Guerrero |first5=Nathalia M. |last6=Martínez |first6=Ana M. |last7=Medina |first7=Paula A. |last8=Ocampo |first8=Edgar F. |last9=Pinilla and Paula A. Ríos, Bibiana P. Rodríguez, Edward A. Salazar, Vladimir L. Zapata |first9=Alejandro |year=2008 |title=Plancha 10bis - Rancho Grande - 1:100,000 |url=https://drive.google.com/open?id=0BwFQPMJEi17QbjBhTUNNYXRpbzQ |publisher=INGEOMINAS |pages=1 |accessdate=2017-06-06}}

Category:Geologic formations of Colombia

Category:Paleogene Colombia

Category:Eocene Series of South America

Category:Divisaderan

Category:Bartonian Stage

Category:Priabonian Stage

Category:Sandstone formations

Category:Siltstone formations

Category:Shallow marine deposits

Category:Reservoir rock formations

Category:Paleontology in Colombia

Category:Geography of La Guajira Department