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Carlos Arce-Chamorro
Instituto Universitario de Xeoloxía, Universidade da Coruña. ESCI, Campus de Elviña. 15071. A Coruña. Spain.
Juan Ramón Vidal-Romaní
Instituto Universitario de Xeoloxía, Universidade da Coruña. ESCI, Campus de Elviña. 15071. A Coruña. Spain.
Vol. 43 (2021), Articles, pages 61-88
Submitted: Oct 19, 2021 Accepted: Nov 18, 2021 Published: Dec 31, 2021
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This work establishes the age of an outcrop of fluvial deposits located at the current mouth of the Ulla River in the Ría de Arousa (Galicia, NW Spain), at +40 m and +30 m above present sea level. The deposits are formed by braided siliciclastic materials. Although they have been known for a long time their age had never been determined, being considered successively from Upper-Tertiary to Quaternary and even Holocene undifferentiated material. Using the optically stimulated luminescence (OSL) technique, a burial age has been calculated for the quartz grains included in the sediment of 180 ky for the lower level and between 70 ky and 60 ky for the upper levels. The chronology established here is consistent with that obtained for other fluvial deposits studied on the Galician and northern Portuguese coast.

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