The crater waits beneath the water, its secrets intact.
Beneath the cold waters near the Falkland Islands, a circular scar roughly 250 kilometers wide may hold the memory of one of Earth's most violent moments. Argentine geologist Maximiliano Rocca, piecing together decades-old maps and gravitational data, believes this subaquatic formation—now called the Malvinas Impact Crater—was born from a catastrophic impact 252 million years ago, coinciding with the Great Dying, the most devastating mass extinction in the planet's history. Like all profound discoveries, this one arrives incomplete: the evidence is suggestive, the theory compelling, but the seafloor keeps its final answer locked beneath layers of sediment and the weight of unfunded ambition.
- Una formación circular de 250 kilómetros bajo el Atlántico Sur podría ser la cicatriz de un impacto cósmico que borró el 90% de las especies marinas hace 252 millones de años.
- El hallazgo desafía la narrativa establecida sobre la Gran Extinción, abriendo la posibilidad de que un asteroide o cometa —y no solo el vulcanismo— haya desencadenado el mayor colapso biológico de la historia terrestre.
- Rocca identificó anomalías magnéticas y gravimétricas que dibujan con precisión inquietante la firma clásica de un cráter de impacto, incluyendo una estructura que bautizó como la Rosa de las Malvinas.
- A pesar de años de investigación y contactos con geólogos británicos, la falta de financiamiento para perforaciones en aguas profundas mantiene la teoría en un limbo científico: convincente pero sin prueba definitiva.
- El cráter espera en el fondo del mar, intacto, mientras la comunidad científica y los organismos de financiamiento permanecen indiferentes ante lo que podría ser uno de los descubrimientos geológicos más importantes del siglo.
El geólogo argentino Maximiliano Rocca llevaba años estudiando mapas antiguos cuando encontró algo que había permanecido invisible durante décadas: una formación circular de unos 250 kilómetros de diámetro bajo las aguas cercanas a las Islas Malvinas. Si su interpretación es correcta, este hallazgo podría reescribir la historia de una de las mayores catástrofes que ha sufrido la vida en la Tierra.
Todo comenzó en 2002, cuando Rocca leyó un artículo de Michael Rampino, investigador de la Universidad de Nueva York, que sugería la existencia de una anomalía submarina en la región. Trece años después, el geólogo Jaime Báez Presser le facilitó acceso a datos de cartografía magnética, entre los que figuraba un mapa gravimétrico de 1997 elaborado por el SEGEMAR. Allí aparecía, inconfundible, una estructura circular en el sector noroeste del archipiélago.
Rocca bautizó la formación como Cráter de Impacto Malvinas y señaló su parecido con Chicxulub, en la Península de Yucatán, el cráter dejado por el asteroide que extinguió a los dinosauros. Pero este sería mucho más antiguo y potencialmente más devastador: habría surgido hace 252 millones de años, durante la Gran Extinción, cuando desaparecieron aproximadamente el 90% de las especies marinas y el 70% de las terrestres. La estructura exhibe un anillo de valores gravitacionales positivos y un centro de energía magnética negativa, rasgos típicos de un impacto colosal. Rocca identificó además una anomalía magnética positiva a la que llamó la Rosa de las Malvinas, por su semejanza con la rosa de los vientos de las cartas náuticas.
Sin embargo, el descubrimiento permanece en suspenso. Para confirmarlo de manera definitiva sería necesario perforar el lecho marino y extraer muestras del subsuelo, una operación que requiere financiamiento que Rocca no ha logrado obtener, pese a haber contactado a geólogos británicos y explorado todas las vías posibles. La evidencia apunta con fuerza en una dirección, pero la ciencia exige certezas. El cráter sigue esperando en el fondo del mar, con sus secretos intactos.
Geologist Maximiliano Rocca was studying old maps when he noticed something that had been hiding in plain sight for decades. Beneath the waters near the Falkland Islands lay a circular formation roughly 250 kilometers across—a structure that, if his interpretation is correct, would rewrite what we know about one of Earth's most catastrophic moments.
Rocca's investigation began in 2002, when he encountered a paper by Michael Rampino, a researcher at New York University, proposing that an underwater anomaly in the region might be an impact crater. The idea intrigued him enough to pursue it further. Thirteen years later, geologist Jaime Báez Presser gave Rocca access to magnetic mapping data that changed everything. Among the files was a 1997 gravimetric anomaly map created by Argentina's Geological and Mining Service (SEGEMAR). There it was: a distinct circular structure in the northwestern part of the archipelago, unmistakable once you knew to look for it.
The formation, now called the Malvinas Impact Crater, bears striking similarities to Chicxulub in Mexico's Yucatán Peninsula—the crater left behind by the asteroid that killed the dinosaurs 66 million years ago. But Rocca believes this one is far older and potentially far more consequential. He argues it formed around 252 million years ago, during an extinction event so severe that scientists call it the Great Dying. In that catastrophe, roughly 90 percent of marine species and 70 percent of terrestrial species vanished from Earth. The mechanism remains debated among researchers, but a massive impact would explain the scale of the devastation.
The crater's signature is written in the planet's magnetic and gravitational fields. It displays a ring of positive gravitational values spanning the full 250-kilometer diameter, surrounding a center of negative magnetic energy. Rocca identified another distinctive feature he named the Rosa de las Malvinas—a positive magnetic anomaly that resembles the compass rose found on nautical charts, marking cardinal directions. These characteristics align with what scientists expect to find at the site of a colossal asteroid or comet strike.
Yet Rocca's discovery remains frustratingly incomplete. He has contacted British geologists and pursued every lead he could find, but the funding necessary to drill deep into the seafloor and extract core samples—the only way to definitively confirm the crater's origin—has never materialized. Without those samples, the theory remains compelling but unproven. The geological evidence points in one direction, but the scientific method demands more. Rocca knows what the data suggests, but he cannot yet prove it. The crater waits beneath the water, its secrets intact, waiting for the resources and will to finally unlock them.
Notable Quotes
Rocca indicates that this crater could have formed 252 million years ago, coinciding with a mass extinction known as the Great Dying— Maximiliano Rocca, geologist
The Hearth Conversation Another angle on the story
Why does a crater from 252 million years ago matter now? That's ancient history.
Because it might explain the worst extinction event in Earth's history. If Rocca is right, a single impact could have triggered the collapse of nearly all life on the planet. Understanding how that happened tells us something about our own vulnerability.
But he doesn't have proof yet. He has maps and magnetic readings. That's not the same as drilling down and finding the actual impact material.
Exactly. That's the frustration. The evidence is suggestive enough that serious scientists take it seriously, but without core samples, it remains a hypothesis. He's been waiting for funding for years.
Who would fund something like that? It's not like there's oil down there.
That's part of the problem. Deep-sea drilling is expensive and usually justified by commercial interest or major institutional backing. A geological mystery, no matter how profound, doesn't always attract that kind of investment.
So what happens next? Does the crater just sit there?
For now, yes. Unless someone with resources decides this question is worth answering. International collaboration could change that, but it requires will and money aligning at the same moment.