Truebano, Beleno facies (Cambrian of Spain)

Where: Spain (42.9° N, 6.0° W: paleocoordinates 52.5° S, 106.5° E)

• coordinate stated in text

• small collection-level geographic resolution

When: upper Member (Lancara Formation), Lenian (516.0 - 510.2 Ma)

• Leonian stage (regional). The Beleno facies of Zamarreno (1972) is equal to the faunal assemblage 1 referred to in this work.

•The faunal assemblage 1 starts with an abrupt onset and a predominance of echinoderms, whereas trilobites and brachiopods are clearly less common.

• bed-level stratigraphic resolution

Environment/lithology: deep subtidal ramp; coarse-grained, dolomitic, glauconitic, gray limestone

• The faunal and lithological transition from the Beleño into the Barrios facies is gradual, characterised by a continuous change in the fossil content, and a successive increase in the siliciclastic material. The environment of the Láncara Formation is interpreted as a transition from a carbonate ramp to a mixed carbonate-siliciclastic ramp with supralittoral-littoral conditions in its western part and shallow sublittoral environments in its eastern region.
• The Beleno facies is characterised by coarsely crystalline, grey to roan dolomitic limestones and limestones with a high content of glauconite and echinoderm debris.

Size class: mesofossils

Preservation: cast

Primary reference: T. Wotte and M. Mergl. 2007. Brachiopods from the Lower-Middle Cambrian Láncara Formation of the Cantabrian Mountains, Northwest Spain. Memoirs of the Association of Australasian Palaeontologists 33:101-122 [W. Kiessling/M. Domansky]more details

Purpose of describing collection: paleoecologic analysis

PaleoDB collection 123266: authorized by Wolfgang Kiessling, entered by Marcus Domansky on 16.01.2012

Creative Commons license: CC BY (attribution)

Taxonomic list

Show authors, comments, and common names
Obolellata
 Obolellida - Trematobolidae
Trematobolus simplex