What feature of the ocean floor does the center slit stand for? The center slit stands for
the passage where the molten material can enter the Mid-Ocean Ridge
, formed by the converging of plates.
What feature of the ocean floor does the center slit stand for quizlet?
What feature on the ocean floor does the center slit stand for?
central valley of mid-ocean ridge where molten material is upwelling from below
.
What do the slide slits stand for?
In the paper model the slide slits stand for
deep ocean trenches where oceanic crust sinks down into the mantle
. The space under the paper stands for the mantle where oceanic crust is recycled and then pushed back up.
What is a spreading center on the ocean floor?
spreading centre, in oceanography and geology,
the linear boundary between two diverging lithospheric plates on the ocean floor
.
What feature of the ocean floor develops?
This rock (basalt) becomes a new part of Earth’s crust. Mid-Ocean Ridges
Seafloor spreading
occurs along mid-ocean ridges—large mountain ranges rising from the ocean floor.
What features on the seafloor are comparable to slits a and c what is happening at slits A and C?
What features on the seafloor are comparable to slits A and C? What is happening at slits A and C?
Ocean trenches
are comparable to slits A and C. The old sea floor is sinking into Earths interior a slits A and C.
What do the stripes on the strips stand for?
The stripes on the strip stand for
the magnetic stripes found on rock of the ocean floor
. It is important for the stripes to be identical on each side because in real rocks of the ocean floor, the stripes that are parallel showing when the magnetic poles of the Earth were north and south.
What does slit B represent in seafloor?
What feature occurs at the corresponding location on the seafloor? Magma is being forced upward creating new ocean floor. The feature that occurs at slit B stands for
the central valley of the mid ocean ridge
.
What processes happen at the side slits as the new seafloor form at the Mid Ocean Ridge?
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.
Where is the mid ocean ridge located?
The mid ocean ridge systems are the largest geological features on the planet. The Mid-Atlantic Ridge (MAR) is a mostly underwater mountain range in the Atlantic Ocean that runs
from 87°N -about 333km south of the North Pole- to subantarctic Bourvet island at 54°S
.
What is another name for a spreading center?
Two main tectonic structures are spreading centers and subduction zones. Spreading centers occur at the boundary between two plates that are moving apart, called
divergent plate boundaries
. Here the plate motion opens a gap between the plates and magma from the mantle rises up through it.
Which of the following is also known as a spreading center?
Divergent boundaries
are also called spreading centers, because seafloor spreading occurs at these boundaries.
What happens at a spreading center?
Spreading centers occur where
two plates are moving away from each other, and deep cracks are opened through the crust
. This lengthening of the crust allows magma from the upper mantle to rise to the surface and cool, commonly forming basalt. An excellent example is the Mid-Atlantic Ridge.
What are the 3 features of the ocean basin floor?
- Continental shelf. Starting from land, a trip across an ocean basin along the seafloor would begin with crossing the continental shelf. …
- Abyssal plains. Continuing your journey across the ocean basin, you would descend the steep continental slope to the abyssal plain. …
- Mid-ocean ridge. …
- Ocean trenches.
What are 4 types of ocean floor?
- Continental Shelf.
- Continental slope.
- Abyssal plains.
- The ocean deeps/ submarine trenches.
What are the four parts of ocean floor?
Features of the ocean floor include the
continental shelf and slope, abyssal plain, trenches, seamounts, and the mid-ocean ridge
.
What process is shown occurring at C and why does it occur?
What process is shown occurring at point C and why does it occur? The process is called
subduction
. Deep-ocean trenches. Where there are trenches, subduction takes place.
What do the colors represent in seafloor spreading?
Youngest seafloor is red and as seafloor gets older it becomes yellow, green and then blue
. NOAA/NESDIS/National Geophysical Data Center, Boulder, CO. This diagram provides evidence of seafloor spreading by showing the ages of ocean floor in the Atlantic and eastern Pacific Oceans.
What is the role of the mid-ocean ridge?
Mid-ocean ridges are the longest, largest and most voluminous magmatic environment on Earth. Ridges are the site of new lithospheric and crustal production that may be subsequently subducted into the mantle and recycled, or involved in magma-producing dehydration reactions that slowly build up continental crust (Fig.
At the mid-ocean ridge spreading axis, these
flips in the direction of the Earth’s magnetic field are recorded in the magnetization of the lava
. This creates a symmetrical pattern of magnetic stripes of opposite polarity on either side of mid-ocean ridges.
What do the different features of the stripes represent?
The stripes represent
the original 13 Colonies
and the stars represent the 50 states of the Union. The colors of the flag are symbolic as well; red symbolizes hardiness and valor, white symbolizes purity and innocence, and blue represents vigilance, perseverance and justice.
How do you do a split and separate?
What is seafloor spreading quizlet?
sea-floor spreading.
the process by which molten material adds new oceanic crust to the ocean floor
.
Which type of plate boundary is shown by the mid-oceanic ridge?
Mid-ocean ridges occur along
divergent plate boundaries
, where new ocean floor is created as the Earth’s tectonic plates spread apart.
Which boundary movement causes the formation of oceanic ridge?
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.
Which type of boundary does ridge push occur?
The ridge-push force is created by tectonic plates moving away from a
divergent boundary
due to their higher elevation than the surrounding ocean floor.
What two features occur at mid-ocean ridges?
Two processes,
ridge-push and slab pull
, are thought to be responsible for spreading at mid-ocean ridges. Ridge push refers to the gravitation sliding of the ocean plate that is raised above the hotter asthenosphere, thus creating a body force causing sliding of the plate downslope.
What is a mid-ocean ridge simple definition?
Definition of mid-ocean ridge
:
an elevated region with a central valley on an ocean floor at the boundary between two diverging tectonic plates where new crust forms from upwelling magma
.
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.
What type of boundary would be found at spreading centers?
Divergent boundaries
. Divergent boundaries occur along spreading centers where plates are moving apart and new crust is created by magma pushing up from the mantle.
What is a spreading center and how do volcanoes form there?
Spreading center volcanism
occurs at the site of mid-oceanic ridges, where two plates diverge from one another
. As the plates are pulled apart, hot asthenosphere rises upward to fill voids of the extended lithosphere.
When two plates are moving towards common Centre is known as?
When two plates move towards each other, the boundary is known as a
convergent boundary
.
Which section of the mid-ocean ridge would stand up higher off the sea floor and why?
Since hot rocks are in a more expanded state and then contract as they cool (as they spread away from the ridge), the
midocean ridges
stand up high above the surrounding seafloor. The seafloor depth increases with distance away from the midocean ridges.
How is magma formed in the spreading center?
Along mid-ocean ridges (also called spreading centers), tectonic plates are moving apart.
Molten rock rises from Earth’s mantle into the gap between the separating plates and produces extensive lava flows
. Along oceanic trenches, tectonic plates are colliding so that one plate is descending below another plate.
Which of the following is the main concept proposed by the seafloor spreading theory?
Sea-floor spreading — In the early 1960s, Princeton geologist Harry Hess proposed the hypothesis of sea-floor spreading, in which
basaltic magma from the mantle rises to create new ocean floor at mid-ocean ridges
.
What is a spreading center on the ocean floor?
spreading centre, in oceanography and geology,
the linear boundary between two diverging lithospheric plates on the ocean floor
.
