Villalba de la Sierra Formation
Introduction The '''Villalba de la Sierra Formation''' is a Campanian to Maastrichtian geologic formation in Spain. Fossil dinosaur eggs have been reported from the formation, that comprises gypsiferous, grey, argillaceous mudstones and sandstones, deposited in a floodplain environment characterised by high seasonality and variability in water availability.
Fossil content The formation has provided abundant titanosaurian remains, including ''Lohuecotitan'' were found in the formation. More than 10,000 fossil remains of various fishes, amphibians, lizards, dinosaurs (''Ampelosaurus sp. '', ''Rhabdodon sp. ''), turtles (''Foxemys mechinorum'', ''Iberoccitanemys convenarum''), and crocodiles (''Lohuecosuchus megadontos'', ''Agaresuchus fontisensis'', ''Musturzabalsuchus sp.'') are also known from the site, one of the richest for the Late Cretaceous in Europe.
See also * List of dinosaur-bearing rock formations** List of stratigraphic units with few dinosaur genera*** Dinosaur eggs
References === Bibliography ===* *  *