The volcanic rock found in the south of León experienced a rotation of almost 60º 300 million years ago, an example of what could have occurred across the entire Iberian Peninsula when, in that moment, it was still being formed. This fact is demonstrated by the magnetic signals of its minerals, currently being analysed by researchers from the universities of Salamanca and Utrecht (The Netherlands). This discovery improves our understanding of a now-disappeared mountain range that stood over what is now north-western Spain, France, and the southern United Kingdom.
The great tsunami that devastated Cádiz after the earthquake in Lisbon in 1755 is the most recent, but not the only one. New sedimentary deposits found on Barbate beach in Cádiz show that a major tsunami occurred 4,000 years ago, and adds to another seven that have occurred during the last 7,000 years. This reduces the recurrence of these events on the Andalusian coast to every one thousand years. According to the study, the deposits resemble the debris from the Japanese tsunami on March 11, 2011.