Why Did The Plate Tectonic Theory Took Decades To Be Accepted?

Plate tectonics theory then became widely accepted among scientists because it relied on hard evidence and could explain most of the modern geological structures such as ocean basins, mountain ranges, and rifts.

During which time period did the theory of plate tectonics become widely accepted quizlet?

The theory of plate tectonics, which was derived from Wegener’s proposal of continental drift in the 1920s, was not generally accepted until the 1960s.

Which of the following is used as evidence by Wegener to develop the theory of continental drift?

Alfred Wegener, in the first three decades of this century, and DuToit in the 1920s and 1930s gathered evidence that the continents had moved. They based their idea of continental drift on several lines of evidence: fit of the continents, paleoclimate indicators, truncated geologic features, and fossils.

Which of the following was predicted by Harry Hess seafloor spreading hypothesis?

What of Harry Hess’s observations led to his hypothesis of sea-floor spreading? Earthquakes occured preferentially at mid-ocean ridges. Sediment cover thickened progressively away from mid-ocean ridges, suggesting ridges are the youngest part of the ocean crust.

How is the age of the ocean sediments seafloor related to the distance from a mid-ocean ridge quizlet?

Seafloor sediment increases in thickness away from the mid-ocean ridge because the oceanic crust is older farther away from the ridge. More sediment will accumulate on the seafloor over time; therefore, the older the crust, the thicker the sediment deposits.

Why is plate tectonics such a widely accepted theory quizlet?

Terms in this set (24) Plate tectonics theory was widely accepted by scientists in what decade? because Wegener couldn’t explain how continents moved. started to break apart during the Mesozoic.

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In what decade did plate tectonics generally get accepted?

By 1966 most scientists in geology accepted the theory of plate tectonics. The root of this was Alfred Wegener’s 1912 publication of his theory of continental drift, which was a controversy in the field through the 1950s.

Why was the Wegener’s theory forgotten?

Why was Wegener’s theory forgotten? He could not explain how the continents could move. Why is Earth not growing in spite of sea floor spreading? because of subduction the Pacific Ocean.

What is plate tectonics theory?

The theory of plate tectonics states that the Earth’s solid outer crust, the lithosphere, is separated into plates that move over the asthenosphere, the molten upper portion of the mantle. Oceanic and continental plates come together, spread apart, and interact at boundaries all over the planet.

How does plate tectonics help explain continental drift and seafloor spreading?

Seafloor spreading helps explain continental drift in the theory of plate tectonics. Plates that are not subducting are driven by gravity sliding off the elevated mid-ocean ridges a process called ridge push. At a spreading center, basaltic magma rises up the fractures and cools on the ocean floor to form new seabed.

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.

What causes tectonic plates to move?

Tectonic shift is the movement of the plates that make up Earth’s crust. 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.

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How did Harry Hess discover seafloor spreading?

Hess discovered that the oceans were shallower in the middle and identified the presence of Mid Ocean Ridges, raised above the surrounding generally flat sea floor (abyssal plain) by as much as 1.5 km. This created new seafloor which then spread away from the ridge in both directions.

How can plate tectonics be used to help explain the difference between a seamount and a Tablemount?

How can plate tectonics be used to help explain the difference between a seamount and a tablemount? A seamount is a coral reef with a cone-shaped top, whereas a tablemount is a coral reef with a flattened top. A seamount is a volcano with a cone-shaped top, whereas a tablemount is a volcano with a flattened top.

How does the age of the seafloor relate to mid-ocean ridges seafloor depth and sediment thickness?

The age, density, and thickness of oceanic crust increases with distance from the mid-ocean ridge. The magnetism of mid-ocean ridges helped scientists first identify the process of seafloor spreading in the early 20th century. Eventually, older oceanic crust encounters a tectonic boundary with continental crust.

How did scientists determine the age of the ocean floor quizlet?

Scientists discovered that the rock that makes up the ocean floor lies in a pattern of magnetized “stripes”. The scientists determined the age of the rocks in the samples. they found that the farther away from the ridge samples were older and the youngest rocks are closest to the ridge.