Bioturbación de invertebrados y microcodium en facies lacustres y fluvialesThanetiense del Valle de Ager (Lérida)

  1. Rossi Nieto, Carlos
Revista:
Geogaceta

ISSN: 0213-683X

Año de publicación: 1992

Número: 12

Páginas: 11-113

Tipo: Artículo

Otras publicaciones en: Geogaceta

Resumen

Lower Thanetian (Paleocene) fluvial and lacustrine deposits in Ager Basin contain frequent invertebrate burrows. These burrows are cylindrical, unlined and internally meniscate or maslve. Four forms are described in detail, showing their relationships with microcodium structures (tin situ* and reworked) and changes in sediment textures. Each trace is characteristic o f d istin c sedim entary and/or ed a p h ic fa c ie s: s h a llo w lacustrine (A 1), palustrine (A2), flood plain soils (:B.2) and crevasse splays (B. 1)