Scientists have uncovered an extraordinary underwater discovery—a vast whale graveyard lying deep beneath the ocean surface. The site, believed to be millions of years old, contains the remains of ancient whales and offers a rare glimpse into prehistoric marine ecosystems.

What caused so many whales to end up in one location? And what can this remarkable find tell us about Earth's distant past?

Millions-Of-Years-Old Whale Graveyard Found On Ocean Floor

Earth's gravitational field has a dent. Known as a "gravity hole", it lies in the Indian Ocean and is the deepest dent in our planet's gravitational field. The sea levels in this circular region are 348 feet lower than any other place on Earth. This is because of a gravitational anomaly, in this case, an extremely weak gravitational pull.

Even though it was discovered in 1948, no one knew what created it. However, a study tried to understand its origin in 2023 and came up with a startling revelation. According to it, an ancient ocean called Tethys once existed between the supercontinents Laurasia and Gondwana. Its death is what led to the formation of the gravity hole in the Indian Ocean.

The study was published in the journal Geophysical Research Letters. The hole spans 3.1 million square kilometres and is located 1,200 km southwest of India.

Researchers created a simulation of the motion of Earth's mantle and tectonic plates over the past 140 million years and came up with scenarios.

Tethys went down with a chunk of Earth's crust 180 million years ago. When Gondwana broke apart, the crust slipped beneath the Eurasian plate. When this happened, shattered fragments of the crust sank deep into the mantle.

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<h2>The African blob that is taller than&nbsp;Mount Everest</h2>

Around 20 million years ago, these fragments displaced high-density material originating from the "African blob" after reaching the lowermost regions of the mantle. &nbsp;

The blob is trapped beneath Africa and stands 100 times taller than Mount Everest. It is made up of crystallised magma. As plumes of low-density magma rose and replaced the magma, the overall mass of the region diminished and its gravity weakened.

However, the research still needs to be corroborated with earthquake data to help verify the existence of low-density plumes beneath the hole. Several similar blobs are believed to exist in Earth's magma, even in places where they shouldn't be.

Even Mars is reported to have such blobs under its surface. Understanding what is happening under the Earth's surface is also expected to help scientists learn more about the red planet.

Earth's gravitational field has a dent. Known as a "gravity hole", it lies in the Indian Ocean and is the deepest dent in our planet's gravitational field. The sea levels in this circular region are 348 feet lower than any other place on Earth.

Earth's gravitational field has a dent. Known as a "gravity hole", it lies in the Indian Ocean and is the deepest dent in our planet's gravitational field. The sea levels in this circular region are 348 feet lower than any other place on Earth. This is because of a gravitational anomaly, in this case, an extremely weak gravitational pull. Even though it was discovered in 1948, no one knew what created it. However, a study tried to understand its origin in 2023 and came up with a startling revelation. According to it, an ancient ocean called Tethys once existed between the supercontinents Laurasia and Gondwana. Its death is what led to the formation of the gravity hole in the Indian Ocean. The study was published in the journal Geophysical Research Letters. The hole spans 3.1 million square kilometres and is located 1,200 km southwest of India. Researchers created a simulation of the motion of Earth's mantle and tectonic plates over the past 140 million years and came up with scenarios. Tethys went down with a chunk of Earth's crust 180 million years ago. When Gondwana broke apart, the crust slipped beneath the Eurasian plate. When this happened, shattered fragments of the crust sank deep into the mantle. Also Read: When will Earth get its next mini-moon? A 1981 and 2022 visitor returns in... The African blob that is taller than Mount Everest Around 20 million years ago, these fragments displaced high-density material originating from the "African blob" after reaching the lowermost regions of the mantle. The blob is trapped beneath Africa and stands 100 times taller than Mount Everest. It is made up of crystallised magma. As plumes of low-density magma rose and replaced the magma, the overall mass of the region diminished and its gravity weakened. However, the research still needs to be corroborated with earthquake data to help verify the existence of low-density plumes beneath the hole. Several similar blobs are believed to exist in Earth's magma, even in places where they shouldn't be. Even Mars is reported to have such blobs under its surface. Understanding what is happening under the Earth's surface is also expected to help scientists learn more about the red planet.

Death of an ocean 180 million years ago created a hole in the Indian Ocean

In an unexpected discovery, scientists have stumbled upon an ancient ocean which once sunk in the inner core of the Earth.&nbsp;

What now is left of this ancient ocean is an enigmatic layer of ocean floor which is filled with secrets of the past.

According to scientists, the hidden layer was formed millions of years ago and is filled with sediment and minerals and helps in understanding the geological history of the Earth.

The discovery of this ancient ocean was made by a seasoned geophysicist from the&nbsp;University of Alabama&nbsp;and the lead author of the study Dr Samantha Hansen.

<h2>What lies hidden in the beefy crust of Earth?</h2>

In the Earth's crust, some of the tectonic plates - which were remnants of the ocean floor - got placed at the core-mantle boundary and formed what was known as an ultra-low velocity zone (ULVZ).

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This ULVZ layer, which is just tens of kilometres thick, is dense in comparison to the surrounding mantle.

“As seismic investigators. Our work is like a high-resolution snapshot of the Earth’s inner structure, and boy, is it more complex than we ever thought!" explained Dr. Hansen.

The scientists have been shocked by the activity going on at the core-mantle boundary. However, the breadth and intricacy of these zones were not known till Arizona State University geophysicist Dr. Edward Garnero and his team started making seismic recordings from Antarctica.

The scientists carried out high-definition imaging which helped them discover gigantic ‘mountains’ at the core, which is five times the height of Mount Everest.

<h2>How will the submerged ocean impact Earth?</h2>

The lost ocean gives a crucial glance into the heat escape mechanisms of our planet which is important for operating its magnetic field.

The subducted ocean floors, which have now formed ULVZs, will be playing a major role in heat regulation.

Watch:&nbsp;Earth slows down by 1.33 milliseconds

<div class="videoWrapper trancodeVideo"><iframe allowfullscreen="" autoplay="1" class="includeVideo" frameborder="0" height="350" src="https://www.wionews.com/videos/earth-slows-down-by-133-milliseconds-741345/embed" style="width:100%;max-width:560px;" width="560"></iframe></div>

These layers can also be instrumental in creating mantle plumes or columns of hot rock that form from the core-mantle boundary to the surface of Earth.&nbsp;

Dr. Garnero said, “It’s incredible how much we can unravel about our Earth by simply listening to the whispers of earthquakes.”

(With inputs from agencies)

In an unexpected discovery, scientists have stumbled upon an ancient ocean which once sunk in the inner core of the Earth. What now is left of this ancient ocean is an enigmatic layer of ocean floor which is filled with secrets of the past.

In an unexpected discovery, scientists have stumbled upon an ancient ocean which once sunk in the inner core of the Earth. What now is left of this ancient ocean is an enigmatic layer of ocean floor which is filled with secrets of the past. According to scientists, the hidden layer was formed millions of years ago and is filled with sediment and minerals and helps in understanding the geological history of the Earth. The discovery of this ancient ocean was made by a seasoned geophysicist from the University of Alabama and the lead author of the study Dr Samantha Hansen. What lies hidden in the beefy crust of Earth? In the Earth's crust, some of the tectonic plates - which were remnants of the ocean floor - got placed at the core-mantle boundary and formed what was known as an ultra-low velocity zone (ULVZ). Also Read: Martian rocks containing signs of life to be brought to Earth, can reveal... This ULVZ layer, which is just tens of kilometres thick, is dense in comparison to the surrounding mantle. “As seismic investigators. Our work is like a high-resolution snapshot of the Earth’s inner structure, and boy, is it more complex than we ever thought!" explained Dr. Hansen. The scientists have been shocked by the activity going on at the core-mantle boundary. However, the breadth and intricacy of these zones were not known till Arizona State University geophysicist Dr. Edward Garnero and his team started making seismic recordings from Antarctica. The scientists carried out high-definition imaging which helped them discover gigantic ‘mountains’ at the core, which is five times the height of Mount Everest. How will the submerged ocean impact Earth? The lost ocean gives a crucial glance into the heat escape mechanisms of our planet which is important for operating its magnetic field. The subducted ocean floors, which have now formed ULVZs, will be playing a major role in heat regulation. Watch: Earth slows down by 1.33 milliseconds These layers can also be instrumental in creating mantle plumes or columns of hot rock that form from the core-mantle boundary to the surface of Earth. Dr. Garnero said, “It’s incredible how much we can unravel about our Earth by simply listening to the whispers of earthquakes.” (With inputs from agencies)

A lost, sunken ocean has been found at Earth's inner core. Will it emerge?

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