What are the evidences in support of the continental drift theory?
(i)The matching of continents : The shorelines of Africa and Sout America facing each other have a remarkable and unmistakable match. (ii)Rocks of same age across the oceans :The belt of ancient rocks of 2000 millions years ages from Brazil coast matches with those from western Africa.
How does Tillite support the theory of continental drift?
The strikingly similar Paleozoic sedimentary sequences on all southern continents and also in India are an example of evidence that supports continental drift. This diagnostic sequence consists of glacial deposits called tillites, followed by sandstones and finally coal measures, typical of warm moist climates.
What is the theory that states that parts of the Earth crust slowly drift atop a liquid core?
In 1915, the German geologist and meteorologist Alfred Wegener first proposed the theory of continental drift, which states that parts of the Earth's crust slowly drift atop a liquid core. The fossil record supports and gives credence to the theories of continental drift and plate tectonics.
What is Tillite and continental drift?
Tillites, which can be found anywhere in the world, indicate that the continents were part of one giant landmass. C. Tillites, which are rock debris left by a meteorite, indicate the continents drifted apart when they were hit by a meteorite.
What is Wegener’s theory of continental drift?
Wegener's continental drift theory introduced the idea of moving continents to geoscience. He proposed that Earth (opens in new tab) must have once been a single supercontinent before breaking up to form several different continents.
What is the theory of continental drift?
The theory of continental drift is most associated with the scientist Alfred Wegener. In the early 20th century, Wegener published a paper explaining his theory that the continental landmasses were “drifting” across the Earth, sometimes plowing through oceans and into each other.
Which layer of the earth has molten rock that causes the tectonic plates to move?
mantle In plate tectonics, Earth's outermost layer, or lithosphere—made up of the crust and upper mantle—is broken into large rocky plates. These plates lie on top of a partially molten layer of rock called the asthenosphere.
How was the continental drift theory developed?
Alfred Wegener first presented his hypothesis to the German Geological Society on 6 January 1912. His hypothesis was that the continents had once formed a single landmass, called Pangaea, before breaking apart and drifting to their present locations.
Which statement best supports the theory of continental drift?
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.
What causes the continental drift?
The causes of continental drift are perfectly explained by the plate tectonic theory. The earth's outer shell is composed of plates that move a little bit every year. Heat coming from the interior of the earth triggers this movement to occur through convection currents inside the mantle.
What do you call the area in the Pacific Ocean where many volcanoes and earthquakes are formed?
The Ring of Fire, also referred to as the Circum-Pacific Belt, is a path along the Pacific Ocean characterized by active volcanoes and frequent earthquakes. The majority of Earth's volcanoes and earthquakes take place along the Ring of Fire.
How do rock formations support continental drift?
Wegener used fossil evidence to support his continental drift hypothesis. The fossils of these organisms are found on lands that are now far apart. Grooves and rock deposits left by ancient glaciers are found today on different continents very close to the equator.
How rocks fossils and climate provided evidence of continental drift?
How did fossils provide evidence for continental drift? Similar fossils occur on different continents. Because many of these organisms could not have crossed an ocean, this provides evidence that the continents were once connected.
How is the Pacific Ring of Fire related to geologic hazards in the Philippines?
The abundance of volcanoes and earthquakes along the Ring of Fire is caused by the amount of movement of tectonic plates in the area. Along much of the Ring of Fire, plates overlap at convergent boundaries called subduction zones. That is, the plate that is underneath is pushed down, or subducted, by the plate above.
Why do geological activities such as earthquake volcanism and mountain formation happen to be confined on certain places around the globe?
Geologic processes such as plate tectonics impact the entire surface of the planet and have major influences on the location of natural hazards like earthquakes and volcanoes. So far, we have only studied large scale patterns in plate tectonics.
What is Strata rock?
In geology and related fields, a stratum (plural: strata) is a layer of rock or sediment characterized by certain lithologic properties or attributes that distinguish it from adjacent layers from which it is separated by visible surfaces known as either bedding surfaces or bedding planes.
How might you explain the same type of rock and rock formations being found on different continents?
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.
How did fossils provide evidence for continental drift quizlet?
fossils provide evidence for continental drift because there was fossils from the same animals and plants found on different continents. around the coast of the two continents, fossils were found on what would have been connected. deposits of coal have been found beneath the ice of antarctica.
How do mountain ranges support continental drift?
Wegener concluded that they formed as a single mountain range. This mountain range broke apart as the continents split up. The mountain range separated as the continents drifted.
How do you describe the location of earthquake epicenters active volcanoes and moving plates in the Pacific Ring of Fire *?
Answer: The Ring of Fire also referred to as the Circum-Pacific Belt is a path along the Pacific Ocean characterized by active volcanoes and frequent earthquakes. … Along much of the Ring of Fire plates overlap at convergent boundaries called subduction zones.
How will you relate the distribution of mountain ranges with the distribution of earthquake epicenters and volcanoes?
Earthquake epicenters are located in areas with volcanoes and mountain ranges, but not all areas with earthquake epicenter have volcanoes and mountain ranges. Areas with volcanoes have earthquake epicenters because volcanic activity resulted shaking of ground known as volcanic earthquake.
How are active volcanoes earthquake epicenters and mountain ranges or belts related to the movement of the Earth’s lithosphere?
These features move because of movement at plates at the plate boundaries. Mountain ranges, ocean trenches, volcanoes, and earthquakes occur in patterns. The movement of plates causes these features to occur. They occur in patterns because certain features are formed at he site of the three types of plate boundaries.
How the stratified rock was formed based on its strata?
stratification (Lat.,=made in layers), layered structure formed by the deposition of sedimentary rocks. Changes between strata are interpreted as the result of fluctuations in the intensity and persistence of the depositional agent, e.g., currents, wind, or waves, or in changes in the source of the sediment.
Why do sedimentary rocks have strata?
Stratification in sedimentary rocks may result from changes in texture or composition during deposition; it also may result from pauses in deposition that allow the older deposits to undergo changes before additional sediments cover them.
How does rock sequence support continental drift?
The same three layers are in the same order in areas now separated by great distances. Wegener proposed that the rock layers were made when all the continents were part of Pangaea. Thus, they formed in a smaller contiguous area that was later broken and drifted apart.
How do rocks fossils and climate provide evidence of continental drift?
How did fossils provide evidence for continental drift? Similar fossils occur on different continents. Because many of these organisms could not have crossed an ocean, this provides evidence that the continents were once connected.
Which fossil would be most useful for evidence of a continental drift?
Possibly the most important fossil evidence found is the plant, Glossopteris. Known as a woody, seed bearing tree, the Glossopteris is named after the Greek description for tongue due to its tongue shaped leaves and is the largest genus of the extinct descendant of seed ferns.
How does the pattern of the ages of rocks of the seafloor support the theory of plate tectonics?
The ages of rocks helps to prove the theory of the sea floor spreading by hot less dense liquids below earth's crust rising toward the surface of the mid ocean ridges. Earths crust would then flow sideways creating the mid ocean ridge. Magma would then flow up and cool into seafloor.
How did the locations of mountain chains support Wegener’s hypothesis?
How did the locations of mountain chains support wegener's hypothesis? Mountain chains that ended at the coastline of one continent seemed to continue on other continents across the ocean. Why was wegener's theory not proven in his lifetime? His idea was easily disproved by geologic evidence.
How would you describe the location of recorded earthquake epicenters active volcanoes and mountain ranges on Earth?
Volcanoes, earthquakes, and mountain ranges can all be found at the site of convergent boundaries. Finally, earthquakes are also found at the site of transform boundaries.