Fossil woods from the Lower Cretaceous Tres Lagunas Formation of central Patagonia (Chubut Province, Argentina)

Silicified fossil woods are common in the Tres Lagunas Formation (Lower Cretaceous) of central Patagonia. This region has a poor record of Early Cretaceous fossil woods. A collection of 23 fossil woods is studied. Fossil wood anatomy is described and compared in detail. The wood flora is composed of conifers. Most of the samples have Araucariaceae-like wood anatomy. The samples are placed into seven taxonomic units: three fossil-species of...