RT Journal Article T1 Asociaciones de ostrácodos continentales de la Fm. Aguilar (Jurásico superior-Cretácico inferior, Cuenca Vascocantábrica) T1 Continental ostracod assemblages from the Aguilar Fm (Late Jurassic-Early Cretaceous, Bascocantabrian Basin) A1 Caballero, F. A1 Rodríguez Lázaro, Julio A1 Hernández, José María A1 Pujalte, Victoriano A1 Robles, Sergio AB The fossiliferous content of the Aguilar Fm. (latest Jurassic-earliest Cretaceous, Bascocantabrian Basin, N. Spain) consist mostly of ostracods, clavatoraceans, porocharaceans and gastropods, plus minor remains of fishes, crocodiles and turtles, a typical association of lacustrine palaeoenvironment. The preliminary analysis of the ostracod assemblages further suggests that (i) the bulk of the unit was deposited during the Jurassic (late Portlandian) and (ii) that salinity variations took place during the evolution of the lacustrine system. Thus, the environment was fresh-water during most of the Portlandian, changing to oligohaline conditions at the end of the Jurassic. A more pronounced change took place during the lowest Cretaceous, when the main water mass became slightly saline, with euryhaline conditions occurring in marginal areas of the lake PB Sociedad Geológica de España YR 1997 FD 1997 LK http://hdl.handle.net/10272/10213 UL http://hdl.handle.net/10272/10213 LA spa DS Repositorio Institucional de la Universidad de Huelva RD 31 may 2026