Question: What Did Alfred Wegener Use As Evidence For His Theory That The Continents Were Once One Giant Land Mass?

What evidence did Wegener use to develop the continental drift theory?

fossil evidenceFigure 3.

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..

What evidence has been found to support the theory of the continents once being one large landmass called Pangea?

The rock formations of eastern North America, Western Europe, and northwestern Africa were later found to have a common origin, and they overlapped in time with the presence of Gondwanaland. Together, these discoveries supported the existence of Pangea.

Which part of Pangea broke apart first?

About 200 million years ago, the supercontinent began to break up. Gondwana (what is now Africa, South America, Antarctica, India and Australia) first split from Laurasia (Eurasia and North America). Then about 150 million years ago, Gondwana broke up.

What is the evidence of seafloor spreading?

Several types of 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. This evidence led scientists to look again at Wegener’s hypothesis of continental drift.

What is the evidence for Pangea?

Evidence of existence Fossil evidence for Pangaea includes the presence of similar and identical species on continents that are now great distances apart.

What was the response to Wegener’s hypothesis?

The main problem with Wegener’s hypothesis of Continental Drift was the lack of a mechanism. He did not have an explanation for how the continents moved. His attempt to explain it using tides only made things worse. But both Galileo and Darwin had serious flaws in their theories when they were first presented.

What two land masses did Pangaea break up into?

About 200 million years ago Pangaea broke into two new continents Laurasia and Gondwanaland. Laurasia was made of the present day continents of North America (Greenland), Europe, and Asia.

What is the best evidence of plate tectonics?

Modern continents hold clues to their distant past. 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.

Who came up with the theory of seafloor spreading?

Harry H. HessThe seafloor spreading hypothesis was proposed by the American geophysicist Harry H. Hess in 1960.

Did dinosaurs live on Pangea?

Dinosaurs lived on all of the continents. At the beginning of the age of dinosaurs (during the Triassic Period, about 230 million years ago), the continents were arranged together as a single supercontinent called Pangea. During the 165 million years of dinosaur existence this supercontinent slowly broke apart.

Which of the following is evidence of plate tectonics?

Other evidence of plate tectonics include Seafloor spreading, which involves the creation of new crust at divergent plate boundaries. … The part of Earth which is composed mostly of rocks; the crust and outer mantle. Mantle. The layer of solid rock between Earth’s crust and core.

What if Pangea never broke apart?

If the continents did not split and remained as a super-continent called Pangea, the world we know it will be very different. Firstly, mountain ranges like the Alps, Himalayas and Andes will not exist. Without tectonic movements, plates will not collide thus mountain ranges will not be borne.

Where is Earth’s heat energy most concentrated?

Most solar energy is absorbed at the surface, while most heat is radiated back to space by the atmosphere. Earth’s average surface temperature is maintained by two large, opposing energy fluxes between the atmosphere and the ground (right)—the greenhouse effect.

What is the force that moves the continents?

The movement of these tectonic plates is likely caused by convection currents in the molten rock in Earth’s mantle below the crust. Earthquakes and volcanoes are the short-term results of this tectonic movement. The long-term result of plate tectonics is the movement of entire continents over millions of years (Fig.

What was the first evidence of continental drift?

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.

What are 4 pieces of evidence for 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.

What did Earth look like before Pangea?

But before Pangaea, Earth’s landmasses ripped apart and smashed back together to form supercontinents repeatedly. … Just like other supercontinents, the number of detrital zircon grains increased during formation and dropped off during breakup of Rodinia.

Is the formation of Pangea Ultima possible?

Pangaea Proxima (also called Pangaea Ultima, Neopangaea, and Pangaea II) is a possible future supercontinent configuration. Consistent with the supercontinent cycle, Pangaea Proxima could occur within the next 300 million years.