EARTH SCIENCE
TECTONICS
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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All rocks located on the floor of the Atlantic Ocean are younger than 180 million years.
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All volcanoes that occur over a hotspot are not associated with plate boundaries.
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Atlantic Ocean crust found near the coast of Africa is older than the crust found near the mid-Atlantic ridge.
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Rocks made of basalt, which formed at the same time, point to the same magnetic north.
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Detailed explanation-1: -Evidence from fossils, glaciers, and complementary coastlines helps reveal how the plates once fit together. Fossils tell us when and where plants and animals once existed. Some life “rode” on diverging plates, became isolated, and evolved into new species.
Detailed explanation-2: -Evidence for the theory of plate tectonics is continental drift, appearance of younger crustal layers in the ocean, earthquakes along plate boundaries called fault lines, the presence of similar fossils and rocks on separate continents, and the matching shapes of continents that once fit together as a larger continent.
Detailed explanation-3: -Some of the evidence supporting the continental drift of the tectonic plates include the presence of similar animals and plant fossils on the shores of various continents, which suggest that they were once joined. Fossils of a freshwater reptile known as Mesosaurus was found both in South Africa and Brazil.
Detailed explanation-4: -Plate tectonics is considered a “unifying theory” in the field of geology because it synthesizes the work and theories of most other areas of geology (Oreskes and LeGrand 2003). The generation of mountains, deep-sea trenches, volcanic chains, island arcs, and rift valleys can be explained by plate motions.