How Does The Land Of Iceland Confirm Seafloor Spreading?
The land structures of Iceland that help confirm seafloor spreading are the volcanoes located throughout Iceland.
How does this confirm the spreading of the seafloor?
Why do you think geologists might find Iceland a useful place for studying 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 does plate tectonic theory predict about the distribution of volcanoes and earthquakes?
What does plate tectonic theory predict about the distribution of volcanoes and earthquakes? They should be evenly distributed throughout the earth. They should occur primarily along plate boundaries.
Which of the following findings support the seafloor spreading theory?
Abundant evidence supports the major contentions of the seafloor-spreading theory. First samples of the deep ocean floor show that basaltic oceanic crust and overlying sediment become progressively younger as the mid-ocean ridge is approached and the sediment cover is thinner near the ridge.
What evidence supports Hess’s theory of sea-floor spreading?
Sea floor continues to spread apart as new crust is added. Processes repeats like a conveyor belt carrying continents along with them. Evidence supported Hess’s theory of sea-floor spreading: eruptions of molten material magnetic stripes in the rock of the ocean floor and the ages of the rocks themselves.
What observations led Alfred Wegener to the theory of continental drift?
Wegener also noticed that if you could shove western Europe and Africa together with North and South America their coastlines would fit together very neatly. All this evidence led Wegener to believe that the continents were once connected but had separated and drifted apart.
Who suggested that the sea-floor was moving and not just the landmasses?
Alfred Wegener produced evidence in 1912 that the continents are in motion but because he could not explain what forces could move them geologists rejected his ideas. Almost 50 years later Harry Hess confirmed Wegener’s ideas by using the evidence of seafloor spreading to explain what moved continents.
What was Alfred Wegener claim?
Continental drift was a theory that explained how continents shift position on Earth’s surface. Set forth in 1912 by Alfred Wegener a geophysicist and meteorologist continental drift also explained why look-alike animal and plant fossils and similar rock formations are found on different continents.
What has become accepted as the primary mechanism for seafloor spreading quizlet?
What is the character of magnetic anomalies on the seafloor? … What has become accepted as the primary mechanism for seafloor spreading? mantle convection cells. How is oceanic crust forced back into the earth’s mantle?
Are volcanoes evenly distributed along plate boundaries?
Volcanoes are not randomly distributed over the Earth’s surface. Most are concentrated on the edges of continents along island chains or beneath the sea forming long mountain ranges.
What are the 3 types of evidence for seafloor spreading?
What three types of evidence provided support for the theory of sea floor spreading? eruptions of molten material magnetic stripes in the rock of the ocean floor and the ages of the rocks themselves.
What is evidence of seafloor spreading Brainly?
One piece of evidence of seafloor spreading is a mid-ocean ridge. Explanation: The Mid-Atlantic Ridge is a mountain system formed by plate tectonics on the seafloor.
What observation supports the seafloor spreading theory Brainly?
Evidence of Magnetic stripes
Magnetic poles have been reversed which is magical for the scientists. It was the greatest support of sea fall spreading.
What are the four findings that support seafloor spreading theory?
In particular four major scientific developments spurred the formulation of the plate-tectonics theory: (1) demonstration of the ruggedness and youth of the ocean floor (2) confirmation of repeated reversals of the Earth magnetic field in the geologic past (3) emergence of the seafloor-spreading hypothesis and …
How did scientists determine the age of the ocean floor?
What statement most accurately describes the theory of seafloor spreading?
What statement most accurately describes the theory of seafloor spreading? a. Oceanic crust continuously forms across the seafloor and is moved by subduction zones toward mid-oceanic ridges where it is consumed.
How did seafloor spreading help explain Wegener’s hypothesis?
Sea floor spreading is the phenomena of new sea floor being created through mid-ocean ridges. Wegener proposed that the continents themselves move which is untrue. … Sea floor spreading caused the break up of Pangea which prompted Wegener to add this in support of his continental drift theory.
Who proved that the seafloor is spreading?
Harry H. Hess
The seafloor spreading hypothesis was proposed by the American geophysicist Harry H. Hess in 1960.
Can we prove the Earth’s crust is in motion by studying the ocean floor?
Scientists who study the Earth tell us the continents and ocean floors are always moving. … Scientists found that the surface of our planet is always in motion. Continents move about the Earth like huge ships at sea floating on pieces of the Earth’s outer skin or crust.
What is Alfred Wegener theory?
How did Alfred Wegener find out about Pangea?
Wegener concluded that South America and Africa (as well as others) had been connected to one another possibly through land bridges some 250 million years ago. … Wegener used Seuss’s work to support his own continental drift hypothesis and considered Gondwanaland to be the southern half of Pangea.
Who is Alfred Wegener And what did he discover?
How does seafloor spreading help scientists to explain continental drift?
When did scientists accept continental drift?
1912
The first truly detailed and comprehensive theory of continental drift was proposed in 1912 by Alfred Wegener a German meteorologist. Bringing together a large mass of geologic and paleontological data Wegener postulated that throughout most of geologic time there was only one continent which he called Pangea.Oct 1 2021
Most volcanoes form at the boundaries of Earth’s tectonic plates. … At a divergent boundary tectonic plates move apart from one another. They never really separate because magma continuously moves up from the mantle into this boundary building new plate material on both sides of the plate boundary.
Why are volcanoes not distributed randomly?
Volcanoes and earthquakes are not randomly distributed around the globe. Instead they tend to occur along limited zones or belts. … As the plates move their boundaries collide spread apart or slide past one another resulting in geological processes such as earthquakes volcanoes and mountain making.
What do I already know about plate boundaries?
A single tectonic plate can have multiple types of plate boundaries with the other plates that surround it. For instance the Pacific Plate one of Earth’s largest tectonic plates includes convergent divergent and transform plate boundaries. The movement of Earth’s tectonic plates shape the planet’s surface.
What is the major evidence that sea floor spreading creates new lithosphere?
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.
How do fossils help prove that the continents move?
One type of evidence that strongly supported the Theory of Continental Drift is the fossil record. Fossils of similar types of plants and animals in rocks of a similar age have been found on the shores of different continents suggesting that the continents were once joined.
Seafloor Spreading
Sea Floor Spreading Lecture