Antonio Herrero Hernández, A. Pineda
In the Villabrágima area (NW, Valladolid province) the marl, limestone, silt and and deposits reveal the existence of a delta fluvio-lacustrine. They are described four facies types: internal lacustrine, prodelta and deltaic front with fluvial channel. In the upper part of this unity is installed a new lacustrine system.
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