View Full-Size Image

 

The morphology of the specific area of Martín Garcia is distinguished by the presence of a shallow bank (the Playa Honda formation) crossed by channels and composed of grey-brown sediments, sandy towards the north, silty sands towards the south and clayey silt (muds) towards the argentinian coast. The delta suffers a continuous advance of 15 meters per year and the consistent decrease of the depth which leads to the formation of sandbanks that later will become islands. This process is present and very active in the area close to the Martín García Island (which has a rocky core) producing the growth of the island Timoteo Domínguez and of the sandbanks such as Santa Ana and Del Medio.