How do the land structures of Iceland confirm seafloor spreading? By
the use of the sonar, Hess was able to map the ocean floor and discovered the mid-Atlantic ridge
(mid-ocean ridge). He also found out that the temperature near to the mid-Atlantic ridge was warmer than the surface away from it.
What are the 4 evidences of seafloor spreading?
Harry Hess’s hypothesis about seafloor spreading had collected several pieces of evidence to support the theory. This evidence was from the investigations of
the molten material, seafloor drilling, radiometric age dating and fossil ages, and the magnetic stripes
.
How does this confirm the spreading of the seafloor?
The magnetism of mid-ocean ridges
helped scientists first identify the process of seafloor spreading
Who prove that seafloor is spreading?
Alfred Wegener
Why do geologists find Iceland a useful place to conduct research on seafloor spreading?
why might geologists find Iceland a useful place to conduct research on seafloor spreading? scientists suggest that
differences in density cause hot, plasticlike rock to be forced upward toward the surface, cool, and sink
.
What are the features of seafloor?
Features of the ocean floor include
the continental shelf and slope, abyssal plain, trenches, seamounts, and the mid-ocean ridge
. The ocean floor is rich in resources. Living things on the ocean floor are used for food or medicines.
What is the importance of seafloor spreading?
Seafloor spreading proves that
the ocean itself is a site of tectonic activity
. Seafloor spreading is just one part of plate tectonics. Subduction is another. Subduction happens where tectonic plates crash into each other instead of spreading apart.
What are 3 pieces of evidence that support seafloor spreading?
Several types of evidence from the oceans supported Hess’s theory of sea-floor spreading-
evidence from molten material, magnetic stripes, and drilling samples
.
Is the Earth’s diameter getting bigger because of seafloor spreading?
New crust is continually being pushed away from divergent boundaries (where sea-floor spreading occurs), increasing Earth’s surface. But
the Earth isn’t getting any bigger
.
Why do tectonic plates move?
The heat from radioactive processes within the planet’s interior causes the plates
to move, sometimes toward and sometimes away from each other. This movement is called plate motion, or tectonic shift.
Where is active seafloor spreading occurring today?
Where is active sea floor spreading occurring today? Seafloor spreading is the movement of old rock that is being pushed by the new young oceanic crust. This would be a divergent since the plates are separating from each other. Active seafloor spreading is occurring at
mid-ocean ridges
.
What is the major evidence that seafloor spreading creates new lithosphere?
When the Earth’s magnetic field reverses, the magnetized minerals align in the opposite direction.
The record of magnetic reversals is carried away from each side of the spreading center of a
mid-ocean ridge, showing that the molten rock is creating new lithosphere.
What process recycles the crust?
Crustal recycling is a tectonic process by which surface material from the lithosphere is recycled into the mantle by
subduction erosion
What are 4 types of ocean floor?
Features of the ocean floor include the
continental shelf and slope, abyssal plain
What is the seafloor called?
The term
seabed
refers to the top-surface of earth in seas and oceans, also known as the seafloor or ocean floor. This surface has a topography, which is directly related to the nature of its subsurface geology, in places modified by ocean currents and sedimentary processes.
Why do Tablemounts have flat tops?
Some seamounts are formed from magma rising at a divergent boundary, and as the plates move apart, the seamounts move with them, which can result in a seamount chain. … As this happens,
the top of the seamount can become eroded flat
, and these flat-topped seamounts are then called tablemounts or guyots.
