The continental jigsaw puzzle can you reassemble a super. Continental drift, largescale horizontal movement of continents relative to one another and to the ocean basins during one or more episodes of geologic time. This crossword puzzle, continental drift and plate tectonics, was created using the crossword hobbyist puzzle maker. There were several past authors that he cited had the similar ideas like william henry pickering and roberto mantovani. He published his observations in a geological comparison of south america with south africa1927, and later he developed his ideas in our wandering continents1937. It wasnt until the middle to late1960s that plate tectonic theory was generally. A to present information supporting wegeners theory of continent drift b to explain how water currents move water to the arctic regions from the equator c to highlight evidence that contradicts wegeners theory of continental drift d to introduce a possible explanation for the spread of animal species across various continents. Wegener thought all the continents were once joined together in an urkontinent before breaking up and drifting to.
Polar wandering similar to continental drift theory polar wandering is the relative movement of the earths crust and upper mantle with respect to the rotational poles of the earth. The super continent was named pangaea, which meant. It provides a useful introduction to more technical. These then drifted apart to form the present arrangement of continents. In some places, it slides under the continental crust and. The reaction to alfred wegeners theory tells us much about the workings of science.
Looking at the vertical longitude lines, two continents are moving faster than the rest. Continental drift and plate tectonics crossword puzzle. Alfred wegeners fossil evidence for continental drift is shown on the cutouts. Over time, the landmass broke and drifted away and is still drifting to this day.
A german meteorologist called alfred wegener proposed the pangaea theory in 1912. Pdf palaeogeography is the cartographic representation of the. He had no satisfactory mechanism to offer, but appealed. Over a vast period of time, the continents drifted apart to their current locations. Set forth in 1912 by alfred wegener, a geophysicist and meteorologist, continental drift also. The continental drift theory depends on a super continent called pangaea. The continental drift hypothesis was developed in the early part of the 20th century, mostly by alfred wegener. This was the time when reptiles and winged insects first appeared. Continental drift a brief history of continental drift theories lab. The viewpoint includes a description of the theory, the evidence to support it, and reasons why some people did not support it. Gk, general studies, optional notes for upsc, ias, banking, civil services. In 1912, a german geologist named alfred wegener came up with an outlandish theory known as continental drift. Subduction zone oceanic crust is heavier than continental crust. He combined a body of new and old evidence to show that the earths continents had once been united in a single body, back in late paleozoic time.
Alfred wegener alfred lothar wegener november 1, 1880 november 1930 was a german polar researcher, geophysicist and meteorologist who developed the first theory of continental drift and formulated the idea that a supercontinent known as pangaea existed on the earth millions of years ago. These two supercontinents may have been united into a still greater conti. The lithosphere is always in a state of work in progress. Plate tectonics is the grand, unifying theory of earth sciences, combining the concepts of continental drift and seafloor spreading into one holistic theory that explains many of. Cut out each of the continents along the edge of the continental shelf the outermost dark line. A large super continent pangea split into smaller fragments about 200300 million years ago. It was a hypothesis that continents move around the world over time. The continental drift theory is the theory that once all the continents were joined in a supercontinent, which scientists call pangaea. The coasts of the continents surrounding the atlantic ocean could, if the continents were moved closer, fit together like a jigsaw puzzle. He believed that all eight continents were once a single supercontinent before separating. Continental drift was a theory that explained how continents shift position on earths surface. In his manual of geology 1863, dana wrote, the continents and oceans had their general outline or form defined in earliest time.
Thus, it is surmised that all the present continents of the world may have been joined in a single super continent called pangea figure 1 circa 200 ma, where ma. According to wegeners continental drift theory, all the continents were one single continental mass called a super continent pangaea and a mega ocean surrounded this supercontinent. According to wegener, all the continents formed a single continental mass and mega ocean surrounded the same. Wegener said that continents move around on earths surface and that they were once joined together as a single supercontinent. A large supercontinent pangea split into smaller fragments about. His seminal volume of meteorology is universally considered a fundamental manual for this discipline and was long a reference text for students and specialists. Alfred proposed that the continents that look like this now. Students will complete some internet searches to discover what type of fossils wegener used to help him come up with his hypothesis. The evidence which gave rise to the theory of continental drift more correctly called plate tectonics includes the following. For the first time in history, the theories of continental drift, supercontinent, and pangaea came into being.
In 1912, alfred wegener proposed a theory that the continents had once been joined, and over time had drifted apart. This is the theory that describes the drifting of the continents to its present location. Continental drift theory continent planetary science. Wegener proposed the existence of pangaea, a super continent comprised of all. This was regarding the distribution of the oceans and the continents. Continental drift theory continental drift is the hypothesis that all the continents had once been joined together in a single landmass.
Such a perception may have been derived from the predominance of the atlantic ocean view map of the world that essentially reflects. The hypothesis of continental drift was developed during the early parts of the twentieth century by wegener. Continental drift refers to the movement of the continents relative to each other. Person who discovered seafloor spreading, which supported the continental drift theory. Wegeners explanation of continental drift in 1912 was that drifting occurred because of.
Wegener and his theory of continental drift indian academy of. A brief overview of the theory of continental drift and the evidence supporting it. This video explores how the apparent fit of the continents, fossil and rock correlation, and paleoclimate data. Pdf a historical account of how continental drift and plate tectonics. The continental drift thesis the theory of continental drift is based mainly upon a superficial, prima facie interpretation of a perceived match between the coastlines of the continents of south america and africa. Theory of continental drift early 1500s explorers noticed the fit between africa and south america 1912 alfred wegener the idea that the continents used to form a super continent called pangea the continents then slowly drifted apart over time to their current locations used fossil evidence as well as the fact that the continents looked like puzzle pieces. The theory of wegener was more complete even though he made it independently. According to the continental drift theory, part of the crust are capable of horizontal movement round the globe causing the continents to slowly change their positions in relation to one another. This concept was an important precursor to the development of the theory of plate tectonics, which incorporates it. The continental drift theory was replaced by the plate tectonic theory which illustrates how the continents drift. Continental drift theory free download as powerpoint presentation. Theory of continental drift home westerville city schools. A viewpoint on the theory of continental drift, developed by alfred wagener. While wegener was alive, scientists did not believe that the continents.
Continental driftpangaea theory explained with pangea map. Gy 111 lecture note series university of south alabama. There he argued for the separation of wegeners pangea into the two super continents, laurasia and gondwana. Long ago there was a super continent called pangaea. Continental drift pangaea broke apart and slowly moved toward their present day location 3. Large supercontinent proposed in the continental drift theory. Wegeners theory of continental drift states that the existing continents of the earth were once glued together forming a super landmass. Continental drift theory was put forward by the german scientist alfred wegner in 1915. The theory deals with the distribution of the oceans and the continents. Continental drift is the theory that the earths continents have moved over geologic time relative. All the continents were once joined together in a single landmass and have since drifted apart 3. He propounded his concept on continental drift in the year 1912.
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