Which of the following features is associated with a deep ocean trench?
Deep-sea trenches generally lie seaward of and parallel to adjacent island arcs or mountain ranges of the continental margins. They are closely associated with and found in subduction zones—that is, locations where a lithospheric plate bearing oceanic crust slides down into the upper mantle under the force of gravity.
How did the Red Sea shown between Arabia and Africa in this figure form?
How did the Red Sea, shown between Arabia and Africa in this figure, form? Continental Rifting followed by seafloor spreading.
Which letter corresponds to the youngest oceanic crust?
30 Cards in this Set
| How did the Red Sea, shown between Arabia and Africa in this figure form? | Continental rifting followed by seafloor spreading |
|---|---|
| Where is subduction occurring on this map of South America? | B |
| On the accompanying figure, which letter is over the youngest oceanic crust? | D |
What does the elevation of the seafloor do as you move away from a mid-ocean ridge?
Mid-ocean ridges and seafloor spreading can also influence sea levels. As oceanic crust moves away from the shallow mid-ocean ridges, it cools and sinks as it becomes more dense. This increases the volume of the ocean basin and decreases the sea level.
Why are ocean trenches important?
By studying ocean trenches, scientists can better understand the physical process of subduction and the causes of these devastating natural disasters.
What do ocean trenches do?
Oceanic trenches are a feature of the Earth's distinctive plate tectonics. They mark the locations of convergent plate boundaries, along which lithospheric plates move towards each other at rates that vary from a few millimeters to over ten centimeters per year.
What is the connection of the story the Red Sea to divergent fault?
Explanation: The Red sea is the result of a divergent boundary, while the Red Sea is not yet an ocean the process is very clearly the beginning of an Ocean. The mid atlantic ridge, is a divergent boundary. The evidence of sea floor spreading is convincing that the ocean is spreading out in both direction.
How was the Red Sea formed?
The Red Sea formed by Arabia splitting from Africa due to continental drift. This split started in the Eocene and accelerated during the Oligocene. The sea is still widening and it is considered that the sea will become an ocean in time (as proposed in the model of Tuzo Wilson).
What kind of plate boundary is found where the North American and Caribbean plates meet?
Stack #514792
| Question | Answer |
|---|---|
| 18.What kind of plate boundary is found where the North American and the Caribbean plates meet? | Transform boundary |
| 19.Which layer of the earth is broken into several large tectonic plates? | Lithosphere |
| 20.Mid-ocean ridges are places where tectonic plates are doing what? | Spreading apart |
What were some of the technological advancements that allowed scientists to study the age of the sea floor?
Deep ocean drilling and radiometric dating in the late 1960s gave an accurate stratigraphy and precise date of the ocean floor. From studying the oxygen isotopes of the shells of microfossils in these cores, scientists were able to begin studying the Earth's past climates in a study known as paleoclimatology.
Which plate boundary and movement commonly create ridges like the Mid Atlantic oceanic ridge explain how ridges can be created by plate tectonics?
Mid-ocean ridges occur along divergent plate boundaries, where new ocean floor is created as the Earth's tectonic plates spread apart. As the plates separate, molten rock rises to the seafloor, producing enormous volcanic eruptions of basalt.
How does the hypothesis of seafloor spreading help explain why continents are able to move?
The Mechanism for Continental Drift Seafloor spreading is the mechanism that Wegener was looking for! Convection currents within the mantle drive the continents. The continents are pushed by oceanic crust, like they are on a conveyor belt. Over millions of years the continents move around the planet's surface.
What is meant by an ocean trench?
Ocean trenches are long, narrow depressions on the seafloor. These chasms are the deepest parts of the ocean—and some of the deepest natural spots on Earth.
Whats is a trench?
Definition of trench (Entry 1 of 2) 1a : a long cut in the ground : ditch especially : one used for military defense often with the excavated dirt thrown up in front.
What happens in the trenches?
With soldiers fighting in close proximity in the trenches, usually in unsanitary conditions, infectious diseases such as dysentery, cholera and typhoid fever were common and spread rapidly.
Is there a trench in the Red Sea?
In addition, the volcanically active trench rift zone of the Red Sea, surrounded by salt glaciers, is host of a giant sink filled with a very hot and very salty solution.
Which geologic feature could take place in the divergent boundary between two plates of oceanic crust?
oceanic spreading ridges When two plates are moving away from each other, we call this a divergent plate boundary. Along these boundaries, magma rises from deep within the Earth and erupts to form new crust on the lithosphere. Most divergent plate boundaries are underwater and form submarine mountain ranges called oceanic spreading ridges.
What does the Red Sea represent?
An action of God at the time of the Exodus that rescued the Israelites from the pursuing forces of Egypt (see also Egypt). According to the Book of Exodus, God divided the waters so that they could walk across the dry seabed. Once they were safely across, God closed the passage and drowned the Egyptians.
Does the Red Sea have trenches?
This questions the previous dating of the opening of the Red Sea. In addition, the volcanically active trench rift zone of the Red Sea, surrounded by salt glaciers, is host of a giant sink filled with a very hot and very salty solution.
Is Japan on the North American plate?
Northern Japan is largely on top of the western tip of the North American plate. Southern Japan sits mostly above the Eurasian plate.
What kind of plate boundary is found at the meeting point of the Philippine and Pacific plates?
The Philippine Sea plate is tectonically unusual in that almost all the boundaries are convergent. The Pacific plate is subducting beneath the Philippine Sea plate to the east while the west/northwestern part of the Philippine Sea plate is subducting beneath the continental Eurasian plate.
What did scientists observe in the ocean floor which indicates that the Pacific Ocean is becoming smaller?
Since subduction rates are much greater than the rates of producing new seafloor at the mid-oceanic ridges, simply because there are more spreading regions than subduction zones, the result is that the Pacific Ocean is shrinking on a geological time scale.
How does technology facilitate the mapping and obtaining relevant information of the depth of water in oceans seas lakes and rivers?
Today, technologies used to create detailed ocean floor, or seabed, maps include multi-beam echosounder. This is a type of sonar that can be attached to a ship's hulls and it returns sound waves that bounce from the seabed.
Which plate boundary and movement commonly create non volcanic mountains explain how non volcanic mountains are created by plate tectonics?
Answer and Explanation: The convergent boundary is one where the impact of the two plates towards one another results in the formation of non-volcanic mountains.
What type of plate movement of boundary is happening in the Mid-Atlantic Ridge?
The Mid-Atlantic Ridge is an example of divergent plate boundaries. When two plates come together, it is known as a convergent boundary. The impact of the colliding plates can cause the edges of one or both plates to buckle up into a mountain ranges or one of the plates may bend down into a deep seafloor trench.
What did scientists observe in the ocean floor which indicates that the Pacific ocean is becoming smaller?
Since subduction rates are much greater than the rates of producing new seafloor at the mid-oceanic ridges, simply because there are more spreading regions than subduction zones, the result is that the Pacific Ocean is shrinking on a geological time scale.
What does the seafloor spreading theory explains about the earth’s surface?
Significance. Seafloor spreading helps explain continental drift in the theory of plate tectonics. When oceanic plates diverge tensional stress causes fractures to occur in the lithosphere. … Older rocks will be found farther away from the spreading zone while younger rocks will be found nearer to the spreading zone.
Why are deep sea trenches important?
Recent research has also revealed unexpectedly large amounts of carbon matter accumulating in trenches, which may suggest that these regions play a significant role in Earth's climate. This carbon is either sequestered in Earth's mantle through subduction or consumed by trench bacteria.
What were trenches used for?
Trenches provided relative protection against increasingly lethal weaponry. Soldiers dug in to defend themselves against shrapnel and bullets. On the Western Front, trenches began as simple ditches and evolved into complex networks stretching over 250 miles (402 kilometres) through France and Belgium.
Where are the trenches?
Ocean trenches are found in every ocean basin on the planet, although the deepest ocean trenches ring the Pacific as part of the so-called “Ring of Fire” that also includes active volcanoes and earthquake zones.