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: IV pollen zone, Middle Eocene (48.6 - 37.2 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 136918: authorized by Carlos Jaramillo, entered by Andrés Cardenas on 06.12.2012
Creative Commons license: CC BY (attribution)