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What supported Wagner's theory of continental drift?
Several evidences were given as proof to the theory of continental drift, they include; 1. Climatic evidence (Paleoclimatic Reconstruction). 2. Fossil evidence (Paleontological proof). 3. Continental fit. (Continental margin shapes). 4. Lithological and Stratigrapical similarities of adjacent continental masses. 5. Seafloor spreading. 6. Glacial till. 7. Plate tectonics.
Explain the relationship between trenches and seafloor spreading?
1. New sea-floor is created by the upwelling of magma at mid-ocean spreading centers; old ocean floor is destroyed by subduction at deep sea trenches. 2. The area is a subduction zone. Magma from underground comes up and destroys that crust. That crust is then recycled and the magma cools and hardens. That creates new land, that creates the trenches. Seafloor spreading is in the ocean and happens with convection currents. That is the relationship between. 3. As new seafloor is formed at mid-ocean ridges, the old seafloor is pushed down into trenches at subduction zones.
How can you prove tectonic plates?
1.) Continents fit together like puzzle. 2.) Mountain Ranges across oceans match up. 3.) Fossil evidence in South America and Africa show that the two continents could have been connected.
What made the scientists believe that the sea floor is spreading?
1. What made scientist believe that the seafloor was spreading? 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. Also, the rock making up the ocean floor is considerably younger than the continents, with no samples found over 200 million years old, as contrasted with maximum ages of over 3 billion years for the continental rocks. This confirms that older ocean crust has been reabsorbed in ocean trench systems. by; Vontamayosa find me on Facebook
How much do the Galapagos Islands move each year?
The Galapagos Islands move about 2-3 centimeters per year due to tectonic plate movement. This geological process is known as seafloor spreading, where the Nazca Plate is moving eastward and causing the islands to shift over time.
What are 3 things of evidence that scientists have that prove the ocean is spreading?
1) seafloor spreading 2) continental drift 3 i only found 2
What are the three lines of evidence for Plate Tectonics?
The three lines of evidence for Plate Tectonics are: 1) the distribution of earthquakes and volcanoes along plate boundaries, 2) the matching shapes of continents on opposite sides of the Atlantic Ocean, known as continental drift, and 3) the patterns of magnetic striping on the ocean floor that provide evidence of seafloor spreading.
What three pieces of evidence did Harry Hess gather to prove that seafloor spreading was taking place?
Magnetic stripes on the seafloor showed alternating patterns of normal and reversed polarity, matching Earth's magnetic field reversals. Age dating of seafloor rocks revealed that rocks were youngest along mid-ocean ridges and oldest near continental margins. Sediment thickness on the seafloor was thinnest at mid-ocean ridges and thickest near the continents, supporting the idea of seafloor spreading.
List three types of evidence for sea-floor spreading?
Magnetic stripes on the ocean floor recorded by magnetometers demonstrate alternating patterns of normal and reversed magnetic polarity, supporting the concept of seafloor spreading. The presence of mid-ocean ridges, where new oceanic crust is formed through volcanic activity, provides direct evidence for seafloor spreading. Analysis of rock samples collected from the ocean floor that show progressively younger ages of rocks as distance from the mid-ocean ridge increases supports the theory of seafloor spreading.
How do you calculate the rate of seafloor spreading?
rate of spreading for stripe = width of stripe / time duration If a magnetic strips is 60 km wide and formed over 2 million years, then the rate at which spreading formed the was 30 km/m.y. The rate is equivalent to 3 cm/year. Spreading added an equal width of oceanic crust to a plate on the other side of the mid-ocean ridge, so the total rate of spreading across the ridge was 60 km/m.y. (6 cm/year), a typical rate of seafloor spreading.
What land forms are caused by the earths moving plates?
1. Seafloor spreading, new crust is made 2. Mountain ranges 3. Volcanoes 4. Faults
What supported Wagner's theory of continental drift?
Several evidences were given as proof to the theory of continental drift, they include; 1. Climatic evidence (Paleoclimatic Reconstruction). 2. Fossil evidence (Paleontological proof). 3. Continental fit. (Continental margin shapes). 4. Lithological and Stratigrapical similarities of adjacent continental masses. 5. Seafloor spreading. 6. Glacial till. 7. Plate tectonics.
Explain the relationship between trenches and seafloor spreading?
1. New sea-floor is created by the upwelling of magma at mid-ocean spreading centers; old ocean floor is destroyed by subduction at deep sea trenches. 2. The area is a subduction zone. Magma from underground comes up and destroys that crust. That crust is then recycled and the magma cools and hardens. That creates new land, that creates the trenches. Seafloor spreading is in the ocean and happens with convection currents. That is the relationship between. 3. As new seafloor is formed at mid-ocean ridges, the old seafloor is pushed down into trenches at subduction zones.
What are 2 of the 3 reasons that scientists believe the plates are moving?
Scientists believe that the plates are moving due to the evidence of seafloor spreading at mid-ocean ridges and the distribution of earthquakes along plate boundaries. Additionally, the study of paleomagnetism provides further support for the theory of plate tectonics.
How can you prove tectonic plates?
1.) Continents fit together like puzzle. 2.) Mountain Ranges across oceans match up. 3.) Fossil evidence in South America and Africa show that the two continents could have been connected.
What made the scientists believe that the sea floor is spreading?
1. What made scientist believe that the seafloor was spreading? 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. Also, the rock making up the ocean floor is considerably younger than the continents, with no samples found over 200 million years old, as contrasted with maximum ages of over 3 billion years for the continental rocks. This confirms that older ocean crust has been reabsorbed in ocean trench systems. by; Vontamayosa find me on Facebook
How many lines on a ruler equal one third?
one in every 3 lines is 1/3 of the 3 lines
