Catatumbo Basin I (Eocene of Colombia)

Where: Norte de Santander, Colombia (9.0° N, 73.0° W: paleocoordinates 6.5° N, 61.7° W)

• coordinate stated in text

• basin-level geographic resolution

When: I pollen zone, Los Cuervos Formation, Early/Lower Eocene (55.8 - 48.6 Ma)

• The base of the Mirador is drawn at the level where the sandstones of the formation rest on the claystones or siltstones of the Los Cuervos. The contact is easily recognized and is, at least locally, unconformable. The Mirador/Los Cuervos contact represents a major change in sedimentation for the region, as it marks the appearance, at higher levels than the Uribante, of abundant, coarse, 'clean' sandstones give way to grey, micaceous, and in part sandy, shales which form the lowermost sediments of the overlying Carbonera Formation.

• bed-level stratigraphic resolution

Environment/lithology: lagoonal; lithified, gray, silty, carbonaceous shale and lithified, silty, sandy claystone

• The Palaeocene formation show evidence that was deposited in a brackish marine to fresh-water environment.
• The Cuervos Formation is composed mainly of claystones and shales with coal beds sandwiched in its lower strata and some sandstone beds throughout. The lowermost deposits, measuring 75 meters in thickness, consist of dark grey carbonaceous shales and claystones interbedded with micaceous-carbonaceous siltstones, fine-grained sandstones and narrow coal seams. Occasionally thin limestones showing a con-in-cone structure have been noted. The coals are lignitic to bituminous. Above the coal series, the Los Cuervos is made up of grey and greenish-grey, partly silty and commonly sideritic claystones, the siderite occurring as spherules generally less than 1 millimeter in diameter.

Size class: microfossils

Preservation: soft parts, original sporopollenin

Collection methods: chemical

• From each coal or lignite layer several individual samples were analyzed, or the results of several samples were pooled.

Primary reference: A. E. González-Guzmán. 1967. A palynological study on the upper Los Cuervos and Mirador formations (Lower and middle Eocene; Tibu area, Colombia). 1-68 [C. Jaramillo/A. Cardenas /C. Jaramillo]more details

Purpose of describing collection: biostratigraphic analysis

PaleoDB collection 136756: authorized by Carlos Jaramillo, entered by Andrés Cardenas on 04.12.2012

Creative Commons license: CC BY (attribution)

Taxonomic list

Scabratriporites moderatus González-Guzmán 1967
Scabratriporites redundans González-Guzmán 1967
Heterocolpites palaeocenica Van der Hammen and Garcia de Mutis 1966
Heterocolpites paluster González-Guzmán 1967
Retitricolpites simplex González-Guzmán 1967
Retitricolpites adeptus González-Guzmán 1967
Retitricolpites absolutus Jaramillo and Dilcher 2001
Retitricolpites adultus González-Guzmán 1967
Retitricolpites bonus González-Guzmán 1967
Retitricolpites conciliatus González-Guzmán 1967
Retitricolpites antonii González-Guzmán 1967
Retitricolpites perditus González-Guzmán 1967
Psilatricolporites operculatus
"Psilatricolporites operculatus" = Ranunculacidites operculatus
"Psilatricolporites operculatus" = Ranunculacidites operculatus Jaramillo and Dilcher 2001
Psilatricolporites operculatus medius and Psilatricolporites operculatus minutus
Psilatricolpites acerbus González-Guzmán 1967
Foveotricolpites pomarius Van der Hammen and Garcia de Mutis 1966
Retibrevitricolpites triangulatus
Retibrevitricolpites triangulatus van Hoeken-Klinkenberg 1966
Retibrevitricolpites catatumbus González-Guzmán 1967
Verrutricolpites irregularis González-Guzmán 1967
Psilamonocolpites medius
Psilamonocolpites medius Van der Hammen 1954
Retistephanocolpites minutus González-Guzmán 1967
Proxapertites operculatus
Proxapertites operculatus Van der Hammen 1956
Proxapertites tertiaria Van der Hammen and Garcia de Mutis 1966
 Ephedrales - Ephedraceae
Ephedripites vanegensis Van der Hammen and Garcia de Mutis 1966 jointfir
Retimonocolpites microreticulatus Van der Hammen and Garcia de Mutis 1966
 Arecales - Arecaceae
Racemonocolpites facilis González-Guzmán 1967
Mauritiidites franciscoi van Hoeken-Klinkenberg 1964
 Arecales -
Longapertites proxapertitoides Van der Hammen and Garcia de Mutis 1966
Longapertites circulatus González-Guzmán 1967
"Retimonocolpites regio" = Arecipites regio Jaramillo and Dilcher 2001
"Psilamonoletes tibui" = Laevigatosporites tibuensis
"Psilamonoletes tibui" = Laevigatosporites tibuensis Jaramillo and Dilcher 2001
 Schizaeales - Schizaeaceae
Cicatricosisporites dorogensis Potonie and Gelletich 1933
Psilatriletes guaduensis
Psilatriletes guaduensis Van der Hammen 1954
"Retitricolporites medius" = Siltaria media Jaramillo and Dilcher 2001
"Retitricolporites hispidus" = Rhoipites hispidus Jaramillo and Dilcher 2001
Brevitricolpites variabilis González-Guzmán 1967
Gemmatricolpites pulcher González-Guzmán 1967
Psilatricolporites obscurus González-Guzmán 1967
Psilatricolporites vanus González-Guzmán 1967
Psilatricolporites optimus González-Guzmán 1967
"Retitricolpites florentinus" = Rousea florentina Jaramillo and Dilcher 2001
Gemmamonocolpites amicus González-Guzmán 1967
Echimonocolpites densus González-Guzmán 1967
Scabrastephanocolpites vanegensis Van der Hammen and Garcia de Mutis 1966
Retitricolporites saskiae González-Guzmán 1967
Retitricolporites profundus González-Guzmán 1967
Retitricolporites finitus González-Guzmán 1967
Retitricolporites equatorialis González-Guzmán 1967
Retitricolporites marianis González-Guzmán 1967
Retitricolporites annaeoides Van der Hammen and Garcia de Mutis 1966
 Proteales -
Retidiporites magdalenensis Van der Hammen and Garcia de Mutis 1966
Foveotriporites hammenii González-Guzmán 1967
Foveotricolporites caldensis González-Guzmán 1967
Foveotricolporites voluminosus González-Guzmán 1967
Semitectotriporites gratus
Semitectotriporites gratus González-Guzmán 1967
Magnotetradites magnus
Magnotetradites magnus Van der Hammen and Garcia de Mutis 1966
Retitriporites dubiosus González-Guzmán 1967
Retitriporites federicii González-Guzmán 1967
Retitriporites tilburgii González-Guzmán 1967
Retitriporites typicus González-Guzmán 1967
Echimorphomonocolpites solitarius
Echimorphomonocolpites solitarius González-Guzmán 1967
Psilasyncolporites parvus
Psilasyncolporites parvus González-Guzmán 1967
Psiladiporites redundantis González-Guzmán 1967
Papillamonocolpites splendens
Papillamonocolpites splendens González-Guzmán 1967
Longitrichotomocolpites triangularis
Longitrichotomocolpites triangularis González-Guzmán 1967
Retistephanocolporites festivus González-Guzmán 1967
Magnatriporites abstractus
Magnatriporites abstractus González-Guzmán 1967
Verrumonoletes usmensoides
Verrumonoletes usmensoides Van der Hammen 1956