- What are 4 types of ocean floor?
- Why is the ocean floor so difficult?
- What is the age of the oldest seafloor?
- What is the youngest ocean?
- What is the oldest type of rock on Earth?
- What ocean is the hottest?
- What is the darkest ocean in the world?
- Why is there no ocean floor much older than 280 million years?
- How do scientists figure out the age of the seafloor?
- What causes the ocean floor to deepen with age?
- Where is the oldest land on earth?
- What was the first rock on Earth?
- Which ocean is the saltiest?
What are 4 types of ocean floor?
Features of the ocean floor include the continental shelf and slope, abyssal plain, trenches, seamounts, and the mid-ocean ridge..
Why is the ocean floor so difficult?
Why is much of the ocean floor so difficult to see? … In the movie, Tim says that ocean currents deposit sediment on the ocean floor.
What is the age of the oldest seafloor?
approximately 280 million yearsThe oldest seafloor is comparatively very young, approximately 280 million years old. It is found in the Mediterranean Sea and is a remnant of an ancient ocean that is disappearing between Africa and Europe.
What is the youngest ocean?
Atlantic OceanThe Atlantic Ocean is the world’s saltiest sea with a water salinity level of between 33 – 37 parts per thousand. It’s the world’s youngest ocean, formed long after the Pacific, Indian and Arctic Oceans of the Triassic Period.
What is the oldest type of rock on Earth?
zirconsRock Type(s): zircon The Jack Hills Zircon is believed to be the oldest geological material ever found on Earth, dating back to about 4.375 billion years, give or take 6 million years – the zircons are not technically rocks, but we felt that they should be included on this list.
What ocean is the hottest?
Persian GulfAnswer: The hottest ocean area is in the Persian Gulf, where water temperatures at the surface exceed 90 degrees Fahrenheit in the summer. Another hot area exists in the Red Sea, where a temperature of 132.8 degrees Fahrenheit has been recorded at a depth of about 6,500 feet.
What is the darkest ocean in the world?
WESTERN PACIFIC Imagine the deepest, darkest place on Earth—an underwater trench plummeting to a depth of 35,800 feet, nearly seven miles below the ocean surface. The Mariana Trench is one of the least explored places on Earth.
Why is there no ocean floor much older than 280 million years?
The oldest oceanic crust is about 260 million years old. This sounds old but is actually very young compared to the oldest continental rocks, which are 4 billion years old. … It is due to the process of subduction; oceanic crust tends to get colder and denser with age as it spreads off the mid-ocean ridges.
How do scientists figure out the age of the seafloor?
Scientists can determine the age of the seafloor by examining the changing magnetic field of our planet. … While it cools down, it records the magnetic field during its formation. The two parts of the oceanic plate are pulled apart, and magnetic stripes become older as they move away from the mid-ocean ridge.
What causes the ocean floor to deepen with age?
During seafloor spreading, lithosphere and mantle cooling, contraction, and isostatic adjustment with age cause seafloor deepening. … In addition, the cooling plate model explains the almost constant depth and heat flow observed in very old seafloor and lithosphere.
Where is the oldest land on earth?
Australia holds the oldest continental crust on Earth, researchers have confirmed, hills some 4.4 billion years old.
What was the first rock on Earth?
The oldest rocks exposed on Earth are nearly 4.0 billion years old. These metamorphic rocks — the Acasta gneisses — are found in Canada. It is probably no coincidence that the oldest rocks found are those that formed as the rate of asteroid bombardment in our solar system slowed.
Which ocean is the saltiest?
Atlantic OceanOf the five ocean basins, the Atlantic Ocean is the saltiest. On average, there is a distinct decrease of salinity near the equator and at both poles, although for different reasons.