Quebrada Colorada, Loma Helechal (Cretaceous of Colombia)

Where: Meta, Colombia (4.2° N, 73.6° W: paleocoordinates 3.9° N, 41.5° W)

• coordinate based on nearby landmark

• local area-level geographic resolution

When: Upper Member (Middle part Formation), Berriasian (145.0 - 139.8 Ma)

• member-level stratigraphic resolution

Environment/lithology: transition zone or lower shoreface; lithified, black shale and lithified, fine-grained, quartzose sandstone

• Black shales. Fine-grained, quarzose and medium-sorted grey sandstones toward the top.

Size class: macrofossils

• Bivalves and plants remains are recorded. Only ammonites were studied.

Preservation: mold/impression

Collected in 1983-1984

Collection methods: quarrying,

Primary reference: J. Dorado Galindo. 1990. Contribucion al Conocimiento de la Estratigrafia de la Formacion Brechas de Buenavista (Limite Jurasico-Cretacico). Region Noroeste de Villavicencio (Meta). Geologia Colombiana (17)7-39 [A. Rojas/A. Rojas]more details

Purpose of describing collection: biostratigraphic analysis

PaleoDB collection 191981: authorized by Alexis Rojas, entered by Alexis Rojas on 26.02.2018

Creative Commons license: CC BY (attribution)

Taxonomic list

Show authors, comments, and common names
Cephalopoda
 Ammonitida - Neocomitidae
Cuyaniceras transgrediens, Cuyaniceras aff. transgrediens
Cuyaniceras transgrediens Steuer 1897 ammonite
Cuyaniceras aff. transgrediens Steuer 1897 ammonite
 Ammonitida - Oosterellidae
? Pseudoosterella ubalaensis
? Pseudoosterella ubalaensis Haas 1960 ammonite