They find fossils of a great white shark in Miramar

They find fossils of a great white shark in Miramar

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The White shark It is the most famous fish species for being one of the marine predators with an imposing build and having an extensive record of attacks on human beings. It is undoubtedly one of the largest species of sharks, reaching 6 meters in length.

A peculiar and casual paleontological find carried out by two neighbors in the seaside resort of Miramar, demonstrates the presence of this curious marine predator from recently identified fossils. The fossils would be close to 10,000 years old.

The White shark it is a species rarely registered in the Argentine sea. A few days ago it was identified in the paleontological record of the city of Miramar, from two teeth deposited in the scientific collections of the Museum of Natural Sciences of that city, located about 450 kilometers from Buenos Aires.

A few years ago, two local residents found them while collecting snails on the beach. Sometimes displaced or rolled fossils appear on our coast, but these remains made the difference.

“Separately in distance and time, the teeth showing an important fossilization process were recovered. The materials in question were taken to the Municipal Museum of Miramar, and were kept in a drawer for a few years, ”commented Daniel Boh, head of the local museum.

The first tooth was found by José Puente on the beaches located in the dunicola nursery forest, and the second was discovered by Miguel Babarro and comes from the neighboring town of Mar del Sud, some 15 kilometers south of Miramar.

Several years passed, until Mariano Magnussen of the Paleontological Laboratory of the new Miramar Museum, noticed the importance of the find while reviewing hundreds of fossils deposited in the collections.

Together with Federico Agnolin (Argentine Museum of Natural Sciences, Conicet, Azara Foundation and Maimonides University), they made the first observations on them and developed some hypotheses about their origin, since fossil remains of whales usually appear in various sectors of the local beaches , snails and urchins that would be linked to the environments where these prehistoric sharks lived.

Later, Sergio Bogan (Fundación Azara and Universidad Maimonides) consulted the fossil collection of this institution and observed these teeth, immediately identifying them as those of aCarcharodon carcharias, popularly known as the white shark.

"Although they present erosion, they are two excellent fossil pieces, one of them from the upper jaw and the other from the lower jaw", said Sergio Bogan, adding "they are the first fossil remains of this species discovered in this sector of the Buenos Aires coast ”.

"The white shark today is extremely rare on our coasts ... and this finding reinforces the previously proposed paleontological model, where the species was much more abundant in the recent past of our sea."

When consulted, Mariano Magnussen I emphasize that; “Miramar is one of the few places in the world where we have paleontological, archaeological and even historical records of the presence of theCarcharodon carcharias”.

It is worth highlighting the participation and due awareness of both neighbors in approaching the museum and leaving the samples at the disposal of science.

All fossils and deposits are protected by law 25,743 / 03 and by municipal ordinance 248/88 where the provincial state (through the Archaeological and Paleontological Heritage Registry Center) has jurisdiction over these fossil recovery issues. Fossils are everyone's heritage, and are a matter of fascination for museum visitors and a constant source of information to learn about the past of our region.

It is extremely important to preserve them together.

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