in general, where would the youngest ocean floor be found?

A B
The crust and upper mantle make up the Earth’s ___________. lithosphere
The youngest material of the ocean floor is found at mid-ocean __________. ridges
Less dense plates of the lithosphere float on the _______. asthenosphere
The results of plate movement can be seen at ________. plate boundaries

Where is the youngest seafloor in the Atlantic Ocean?

Where is the youngest seafloor in that ocean? The youngest seafloor is almost exactly in the middle of the Atlantic Ocean. The youngest ages extend the entire length down the center of the ocean basin. 3.

At which location is the youngest tectonic plate being made quizlet?

They found that the youngest rocks on the seafloor were at the mid-ocean ridges. The rocks get older with distance from the ridge crest.

Where are the youngest rocks in the seabed?

Seafloor Ages

They found that the youngest rocks on the seafloor were at the mid-ocean ridges. The rocks get older with distance from the ridge crest. The scientists were surprised to find that the oldest seafloor is less than 180 million years old.

Where are the newest rocks on Earth found?

An astonishing new rock formation has been revealed in the Colorado Rockies, and it exists in a deeply perplexing relationship with older rocks. Named the Tava sandstone, this sedimentary rock forms intrusions within the ancient granites and gneisses that form the backbone of the Front Range.

Why are the youngest rocks in the middle of the ocean?

The youngest crust of the ocean floor can be found near the seafloor spreading centers or mid-ocean ridges. As the plates split apart, magma rises from below the Earth’s surface to fill in the empty void. … Like any rock, the plates of basaltic composition become less thick and denser as they cool.

What is the youngest rocks found near mid ocean ridges?

The youngest crust (shown in red) is near mid ocean ridges and spreading zones. All three rock types in the earth’s crust—igneous, sedimentary, and metamorphic—can also be recycled back to their original molten magma form. This process occurs when oceanic crust is pushed back into the mantle at subduction zones.

Where in the ocean would you expect to find the oldest sea floor rock?

Mediterranean Sea
The 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.

Which is the youngest ocean in the world?

Indian Ocean
Indian Ocean, body of salt water covering approximately one-fifth of the total ocean area of the world. It is the smallest, geologically youngest, and physically most complex of the world’s three major oceans (Pacific, Atlantic, and Indian).

Where are the youngest rocks on Earth found quizlet?

Found the youngest rocks are closest to mid ocean ridges, rocks get older the further they are away from the ridge by taking rock samples from the ocean floor.

Which of the following best explains why the oceanic crust is youngest at the oceanic ridges?

Explanation: Mid Ocean ridges are the source of new crustal material. It is thought that convection currents brings fresh magma to the surface at the divergent boundaries The youngest part of the world crust is found in oceanic crust next to the mid ocean ridges.

Which geologic structure are the youngest rocks on Earth found?

Aside from volcanoes, the youngest rock material in a particular area is most likely towards the top of the many layers of Earth’s crust. In contrast, some of the oldest rock material on Earth is at the very bottom of the ocean.

Where would you expect to find the newest rock on the ocean floor?

The newest, thinnest crust on Earth is located near the center of mid-ocean ridge—the actual site of seafloor spreading.

Which is the youngest rock in this strata?

The law of superposition states that rock strata (layers) farthest from the ground surface are the oldest (formed first) and rock strata (layers) closest to the ground surface are the youngest (formed most recently). A fossil is the remains or traces of plants and animals that lived long ago.

Does Obsidian exist?

obsidian, igneous rock occurring as a natural glass formed by the rapid cooling of viscous lava from volcanoes. Obsidian is extremely rich in silica (about 65 to 80 percent), is low in water, and has a chemical composition similar to rhyolite.

Where is new ocean floor formed?

mid-ocean ridges
Seafloor spreading or Seafloor spread is a process that occurs at mid-ocean ridges, where new oceanic crust is formed through volcanic activity and then gradually moves away from the ridge.

What is used to map the ocean floor?

Dive and Discover : Oceanographic Tools: Sonar. Echo sounding is the key method scientists use to map the seafloor today. The technique, first used by German scientists in the early 20th century, uses sound waves bounced off the ocean bottom.

Where is the oldest ocean floor found in relation to the ocean ridge?

The oldest parts of the oceanic crust are found farest from the mid ocean ridges at subduction zones and continental shelves.

What is an ocean floor ridge?

A mid-ocean ridge or mid-oceanic ridge is an underwater mountain range, formed by plate tectonics. This uplifting of the ocean floor occurs when convection currents rise in the mantle beneath the oceanic crust and create magma where two tectonic plates meet at a divergent boundary.

Which feature would you find at an area of sea floor spreading?

Midocean ridges, transform faults and fracture zones are the key surface features produced by seafloor spreading.

Are there 5 oceans?

Historically, there are four named oceans: the Atlantic, Pacific, Indian, and Arctic. However, most countries – including the United States – now recognize the Southern (Antarctic) as the fifth ocean. The Pacific, Atlantic, and Indian are the most commonly known. The Southern Ocean is the ‘newest’ named ocean.

What are all the 5 oceans called?

Ocean Geography

  • The Global Ocean. The five oceans from smallest to largest are: the Arctic, Southern, Indian, Atlantic and Pacific. …
  • The Arctic Ocean. …
  • The Southern Ocean. …
  • The Indian Ocean. …
  • The Atlantic Ocean. …
  • The Pacific Ocean.

When did there become 5 oceans?


in general, where would the youngest ocean floor be found?



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