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A study of the stratigraphic and structural relationships of 23 lower and middle Jurassic fossiliferous localities, most of them reported for the first time, in the Betic cordilleras of the Malaga region, Spain. The distribution of the various paleontologically defined horizons in the different structural units is summarized in a table.

Jurassic-Cretaceous transition, sedimentary lithologies, nodules with concentric structures, zone of shallow seas swept by currents