also called rock engravings or insculturas, spread throughout the Bronze Age (1800 - 600a.C.). Located near major courses auga and the sea, over small rocks and river valleys, the highest concentration we have in the coastal area of ​​the province of Pontevedra (lower course of the Lérez river and on the banks of the estuaries of Marin and Vigo). The types are diverse: from simple holes (cups) through circular combinations, spirals, weapons, even animals (deer, horses, snakes) and human representation. Less common would be the mazes, swastikas, idols and zigzag.

It is not known exactly what could be their purpose, although there are many speculations: magic, religion, propitiatory rites for hunting ...

The City Council Marin has a very high density of petroglyphs, divided into twelve stations (= concentration recorded) composed in turn by thirty-four groups or engraved stones,

Located mainly in the parishes of Mogor and San Xulián. In addition to the known and famous petroglyphs of Mogor studied by many researchers worldwide, we recorded Cachada Grande Carballás, champas, Chan da Lagoa, Cadro, and Pornedo (in the parish of San Xulián of Marín), and Godalleira and Seven Swords (in the parish of San Xurxo de Mogor). His condition in general, and despite being declared artistic historical monuments, is not adequate, but fared better than others that disappeared as the Teixugueira, those of Laxe, Pedra dos Namorados or engraving of a He cervid who put an end to the road of beaches.

And let's not forget the contemporary "petroglyphs" we have in the City Council, the Jiminy Meijon, character filled with graburas countless stones, walls, bridges, houses, and other places, with motifs of the most unlikely, which also form part of our heritage and it would also be interesting to make a cataloging