RT Journal Article T1 Bioturbación de invertebrados y microcodium en faciès lacustres y fluviales: Thanetiense del Valle de Ager (Lérida) A1 Rossi, C. AB 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) PB Sociedad Geológica de España YR 1992 FD 1992 LK http://hdl.handle.net/10272/16322 UL http://hdl.handle.net/10272/16322 LA spa DS Repositorio Institucional de la Universidad de Huelva RD 30 may 2026