Where: Norte de Santander, Colombia (9.0° N, 73.0° W: paleocoordinates 6.5° N, 64.5° W)

• coordinate stated in text

• basin-level geographic resolution

When: III pollen zone, Middle Eocene (47.8 - 37.7 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: fluvial-deltaic; lithified, massive, fine-grained, coarse, conglomeratic sandstone and lithified, lenticular, brown, argillaceous shale

Size class: microfossils

• Pollen grain

Preservation: soft parts, original sporopollenin

Collection methods: 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 136828: authorized by Carlos Jaramillo, entered by Andrés Cárdenas on 05.12.2012

Creative Commons license: CC BY (attribution)