What occurs at mid-ocean ridges quizlet?
Seafloor spreading 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. Seafloor spreading helps explain continental drift in the theory of plate tectonics.
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 of the following parts of geologic time is the shortest?
Epochs. Epochs are then divided into ages, which are the shortest division of geologic time.
When two oceanic plates converge a curved belt of volcanic islands called an island?
A subduction zone is also generated when two oceanic plates collide — the older plate is forced under the younger one — and it leads to the formation of chains of volcanic islands known as island arcs.
Which letter represents a mid-ocean ridge?
Which letter represents a mid-ocean ridge? Q.
How does seafloor spreading explain why the youngest rocks are found near the Mid Atlantic Ridge?
The crust is also very thin there. With distance from the ridge crest, the sediments and crust get thicker. This also supports the idea that the youngest rocks are on the ridge axis and that the rocks get older with distance away from the ridge (Figure below).
Is the Red Sea oceanic or continental?
Abstract. (1) The northern Red Sea is an amagmatic continental rift in which an oceanic spreading center is beginning to develop.
What plate is the Red Sea on?
The Arabian Plate is rifting away from the African plate along an active divergent ridge system, to form the Red Sea and Gulf of Aden.
What are the four eras in order from oldest to youngest?
The four main ERAS are, from oldest to youngest: PreCambrian, Palaeozoic, Mesozoic and Cenozoic.
What is the correct order of geological time from largest to smallest?
From longest to shortest, the segments of time are eon, era, period, and epoch. 5.
When two tectonic plates collide the oceanic crust usually subducts beneath the continental crust Why is this so?
When an oceanic plate converges with a continental plate, the oceanic crust will always subduct under the continental crust; this is because oceanic crust is naturally denser. Convergent boundaries are commonly associated with larger earthquakes and higher volcanic activity.
When two tectonic plates collide the continental crust usually rise up over the oceanic crust because it is?
Oceanic crust is typically denser than continental crust and is forced downwards into the hot mantle when it collides with continental crust. The less dense conitinental crust is forced upward. This occurred in Ireland with the closure of the Iapetus Ocean over 450 million years ago.
Where is the youngest crust found?
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.
What is the youngest crust is found the mid-ocean ridge?
Seafloor is youngest near the mid-ocean ridges and gets progressively older with distance from the ridge.
Where is the youngest oceanic crust?
mid ocean ridges The age of oceanic crust in millions of years. 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.
Which seafloor is the youngest?
Mid-Atlantic Ocean Ridge Where plates move apart, new crustal material is formed from molten magma from below the Earth's surface. Because of this, the youngest sea floor can be found along divergent boundaries, such as the Mid-Atlantic Ocean Ridge.
Is the red ocean real?
A massive algae bloom along Australia's beaches turn the ocean the color of blood. It looks like something straight out of Dr. Seuss's world, but this is no imaginary scene.
Why is it called Red Sea?
The Red Sea is the saltiest sea of all the seas that connect to the ocean without even one river meeting the sea. A popular hypotheses about the origins of the Red Sea's name is that it contains a cyanobacteria called Trichodesmium erythraeum, which turns the normally blue-green water a reddish-brown.
Which nations border the center of the East African Rift Triple Junction?
The Afar region in Northern Ethiopia is the centre of a “Y” shaped rift system, where the continental lithosphere is being stretched and is splitting.
What is the type of plate boundary that occurs between the African Plate and the Arabian Plate?
Answer and Explanation: The type of tectonic plate boundary that occurs between the African Plate and the Arabian Plate is a divergent plate boundary.
Which era is the youngest?
The four main ERAS are, from oldest to youngest: PreCambrian, Palaeozoic, Mesozoic and Cenozoic. Periods are a finer subdivision in the geological time scale.
What are the 4 eras in order?
The Precambrian, Paleozoic, Mesozoic, and Cenozoic Eras.
What are the 4 eras from oldest to youngest?
The four main ERAS are, from oldest to youngest: PreCambrian, Palaeozoic, Mesozoic and Cenozoic.
What is the youngest era?
The Cenozoic The Cenozoic is the youngest era and the name means “new life”.
What is formed on top of plate B?
what is formed on top of plate B? Answer: Magma rise up on top of plate B to form volcanoes. As the leading edge of plate A subducted beneath plate B, it move towards the mantle and melts when it reaches the mantle due to high temperature in the mantle.
When oceanic crust meets oceanic crust along a convergent boundary which plate is to be subducted?
denser plate If the two plates that meet at a convergent plate boundary both are of oceanic crust, the older, denser plate will subduct beneath the less dense plate.
When 2 tectonic plates collide the oceanic crust usually subducts beneath the continental crust because it is?
When an oceanic plate converges with a continental plate, the oceanic crust will always subduct under the continental crust; this is because oceanic crust is naturally denser. Convergent boundaries are commonly associated with larger earthquakes and higher volcanic activity.
Which is the youngest oceanic crust?
The age of oceanic crust in millions of years. 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.
Which of the following is the youngest ocean?
The Indian Ocean is the smallest, geologically youngest, and physically most complex of the world's three major oceans (the others being the Pacific and Atlantic). Although it first opened some 140 million years ago, almost all of the Indian Ocean basin is less than 80 million years old.
Which is the youngest ocean?
The Southern Ocean, geologically the youngest of the oceans, was formed when Antarctica and South America moved apart, opening the Drake Passage, roughly 30 million years ago. The separation of the continents allowed the formation of the Antarctic Circumpolar Current.