Continental drift section 1 plate tectonics underlined words and phrases are to be filled in by students on the a. Plate tectonicscontinental drift and mountain building article pdf available in bulletin of volcanology 741. The 1965 paper of bullard, everett and smith was a linking transition between the theories of continental drift and plate tectonics. An insiders history of the modern theory of the earth on. It explains that the continents drifted apart because of the constant interaction between the earths tectonic plates and the heat of. Plate tectonics and continental drift infographic live.
In view of the intended range and modest scope of the article, we have kept. Continental drift, plate tectonics, earth core, plate. Bromley plate tectonic setting of applalaciancaledonian mineral deposits as indicated by newfoundland examples d. Tectonic plates and continental drift animation mcgrawhill animations. This is consistent with the previously considered evidence for continental drift and validates the hypotheses of wegener and du toit. The lithosphere is broken up into seven very large continental and oceansized plates, six or seven mediumsized. Jun 07, 2017 tectonic plates and continental drift animation mcgrawhill animations. Continental drift and plate tectonics plate tectonics. If you continue browsing the site, you agree to the use of cookies on this website. The concept was independently developed by german geologist alfred wegener in 1912. Embed for hosted blogs and item download options download 1 file. Frisch and meschede and blakey answer all these questions and more through the presentation and explanation of the geodynamic processes upon which the theory of continental drift is based and which have led to the concept of plate tectonics.
He also proposed a tectonic cycle the wilson cycle. 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 the major structural features of the earths surface. Never before has there been a powerpoint about continental drift and plate tectonics that is so straightforward and engaging, with dozens of original animations and illustrations, smooth transitions, and a healthy dose of humor scattered over 255 slides, your students are guaranteed to be engrossed. Plate tectonics plate tectonics is the unifying theory of geology and revolutionized geology cornerstone of earthsystem approach. Continental trench, volcanic arc, subduction, lithosphere, asthenosphere. The theory has caused a revolution in the way we think about the earth. Plate tectonics, our major paradigm for how the earth works, was established in the 1960ies following decades of observational research that culminated in key. Continental drift is an archaic and misleading term that is no longer in use. Continental drift is shown and described red slide alfred wegener is mentioned and his proposals in 1915. This is the name of the proposed supercontinent where all the earths continents were once joined together. Continental drift and plate tectonics are two theories explaining the geological evolution of the earth, specifically its crust. Difference between continental drift and plate tectonics.
You are allowed to download the video for nonprofit, educational use. Continental drift, sea floor spreading and plate tectonics plate tectonics is a theory developed in the late 1960s, to explain how the outer layers of the earth move and deform. Subduction zones are where mountainbuilding orogeny occurs 6. The youngest oceanic crust is at the ridge crest, and the oldest oceanic crust is at the continental margins. General article alfred wegener from continental drift. Plate tectonics and the continental drift theory on vimeo. Animation of sea floor spreading worldwide earthquake patterns help us know where the edges of plates are located the earths plates wegener 18801930 continental drift was wegeners theory that all continents had once been joined together in a.
It explains that the continents drifted apart because of the constant interaction between the earths tectonic plates and the heat of the earths core. How we know plate tectonics happens most earthquakes and volcanoes occur. Continental drift pangea final pangea plate tectonics. Plate tectonics earths surface divided into many plates that move slowly over the surface and interact with each other their movements are driven from below internal heat and convection in the earth what is convection. Alfred wegener from continental drift to plate tectonics a j saigeetha and ravinder kumar banyal keywords continental drift, plate tectonics.
Plate tectonics continental drift and mountain building pdf. Continental drift, sea floor spreading and plate tectonics. The concept of plate tectonics was formulated in the 1960s. According to the theory of continental drift, the world was made up of a single continent through most of geologic time. This open educational resource is free of charge, under a creative commons. Learn plate tectonics science 4 1 drift with free interactive flashcards. Ridges and trenches gave insights into natural boundaries between various lithospheric plates tectonic plates. The idea of continental drift has since been subsumed by the theory of plate tectonics, which. Plate tectonics, theory dealing with the dynamics of earths outer shell that revolutionized earth sciences by providing a uniform context for understanding mountainbuilding processes, volcanoes, and earthquakes as well as the evolution of earths surface and reconstructing its past continents and oceans. The crust is broken up into giant tectonic plates that ride atop. A free powerpoint ppt presentation displayed as a flash slide show on id. These important discoveries led to the field of tectonics in geology. The lithosphere is divided into moving segments that change. Many evidences for continental drift are then shown in a series of slides.
For nearly half a century, from the 1920s to the 1960s, most scientists paid little attention to the idea of continental drift. Tuzo wilson offered a fundamental reinterpretation of wegeners continental drift theory and became the first person to use the term plates to describe the division and pattern of relative movement between different regions of the earths surface i. Continental drift ppt free download as powerpoint presentation. An animation of plate tectonics is shown and plate tectonics is described red slide. This was the time when reptiles and winged insects first appeared. According to the theory, earth has a rigid outer layer, known as the lithosphere, which is typically about 100 km 60 miles thick and overlies a plastic moldable, partially molten layer called the asthenosphere. Tectonics during ww ii, it was discovered that the ocean floor had some unique relief features like ridges, trenches, seamounts, shoals etc. Plate tectonics and the continental drift theory by. Continental mergers triggered extinctions separation of continents caused the isolation and diversification of organisms millions of y ear s ago cenozo eurasia i c meso zoi c p a l e oz oic n o rt h a mer i ca africa south india america antarctica a us t r a l i a. Mar 17, 2016 in the early 20th century, geologists began to realize that the earths outer crust is not one solid piece like an eggs shell. Continental drift and plate tectonics a brief history what is continental drift. Plate tectonics continental drift from circa 1911 alfred wegener, after being influenced by a scientific paper he had come across that listed fossils of identical plants and animals found on opposite sides of the atlantic, began proposing a then most controversial theory which held that the continents of the earth had once been joined together but had drifted apart through a process that he. Pdf alfred wegenerfrom continental drift to plate tectonics.
Plate tectonics should be required reading for all people because we live on a very dynamic planet. Continental drift plate tectonics jeopardy template. Continental drift and plate tectonics free download as powerpoint presentation. Since the development of the theory, geologists have had to reexamine almost every aspect of. Midocean ridges are essentially submerged mountain chains that are characterised by a deep central rift valley. The secular variantion of longitudes and plate tectonic motion. Time scales of geology and tectonic motion hutton and hall studied geologic processes in siccar point, britain where a subhorizontal devonian. Comparing the continental drift and plate tectonic theory in this readers theater, based on a talk show theme, alfred wegener and current scientists come to discusssing their theories of crustal movement. Her current interests include the crustal deformation and modeling, plate tectonics, and gps geodesy. Continental drift theory alfred wegener proposed that. Alfred sings a song based on taylor swifts shake it off. Continental drift is the theory that the earths continents have moved over geologic time relative. In the early 20th century, geologists began to realize that the earths outer crust is not one solid piece like an eggs shell.
Plate tectonics continental drift from circa 1911 alfred wegener, after being influenced by a scientific paper he had come across that listed fossils of identical plants and animals found on opposite sides of the atlantic, began proposing a then most controversial theory which held that the continents of the earth had once been joined together but had drifted apart through a. Geologic events, such as earthquakes and mountain building, result from movement of the plates. Continental drift theory alfred wegener proposed that parts of earths crust slowly drift atop a. Tectonics is the scientific study of forces convection currents in the. In some places, it slides under the continental crust and melts into the.
A j saigeetha is currently working in csircmmacs, bangalore. Continental drift theory continental drift is the hypothesis that all the continents had once been joined together in a single landmass. Continental drift is a theory first presented by abraham ortelius abraham ortels in 1596. Studies on subduction initiation have been many and con. All continents were once connected as one large landmass now called pangaea. Students explore the basics of wegeners theory of continental drift. Using the law of uniforitarianism and evidence of plate tectonics, explain how you know pangea once existed, and infer where continents will be located on our globe in the future. Sep 30, 2017 students explore the basics of wegeners theory of continental drift. Ppt continental drift and plate tectonics powerpoint. Jun 20, 20 continental drift and plate tectonics are two theories explaining the geological evolution of the earth, specifically its crust. Learn plate tectonics continental drift questions with free interactive flashcards. Strong influence of crustal evolution on ore deposition j. The continental drift hypothesiscontinents have moved slowly to notetaking worksheet. The term continental drift was coined to support the idea that the continents were floating around on a sea of magma, drifting about and crashing into each other.
Oreskes, naomi 2002, continental drift pdf, in munn, ted. Choose from 500 different sets of plate tectonics science 4 1 drift flashcards on quizlet. Activity 1 resource l1 example of resource for activity 2 l2 continental drift worksheet. Proposed by german meteorologist alfred wegener in 1912 all continents were once. Tectonic plates and continental drift animation youtube. Continental drift and plate tectonics slideshare uses cookies to improve functionality and performance, and to provide you with relevant advertising. This took a loooong time to make, but it was totally worth it. At subduction zones subduction zones are where mountainbuilding orogeny. Analysis of secular polar motion and continental drift,bull.
Continental drift ppt plate tectonics mantle geology. General article alfred wegener from continental drift to. Ever since the first global maps were drawn following the great voyages of discovery of the 15th and 16th centuries, it has been realised that the coastline geography of the continents on either side of the atlantic ocean form a pattern that can be fitted back together. Concerning the theory of plate tectonics, i am more knowledgeable than the average person on the street, but i am greatly humbled by the vast expanse of what plate tectonics involves and the depth of knowledge that geologist have attained. To summarise, the theory of continental drift was published by wegener in. Importantly, drift paths recorded by paleomagnetism culminate in the assembly of a supercontinent during the late paleozoic. Mineral deposits, continental drift, and plate tectonics. New ocean crust is created along midocean ridges 4. Most earthquakes and volcanoes occur along plate boundaries 3. Most influential earth scientists were based in the northern hemisphere, whereas most of the conclusive data came from the southern hemisphere there were plausible alternative explanations to the distribution of fossils and glacial deposits the geophysisists could not think of a force strong. Continental drift and plate tectonics powerpoint, notes.
Pdf problems in accepting plate tectonics and subduction as a. This was a revolutionary idea lets make sure we understand this. The pictures show continental drift theory from 225 million years to present. Continental drift and plate tectonics university of iceland. Continental drift, plate tectonics, earth core, plate boundaries. Then new evidence about earths structure led scientists to reconsider wegeners bold theory. Subduction zone oceanic crust is heavier than continental crust.
Download fulltext pdf alfred wegenerfrom continental drift to plate tectonics article pdf available in resonance 106. From the early history of the geological revolution to the latest in explanations of the rocky mountains, firsch et al. Continental drift and mountain building is a terrific summary of stateoftheart plate tectonics science at 2011. The aim of this article is to briefly introduce the concept of plate tectonics and also to highlight the role that wegener played to advance it. That continent eventually separated and drifted apart, forming into the seven continents we have today. Enrol and complete the course for a free statement of participation or digital badge. The first comprehensive theory of continental drift was suggested by the german meteorologist alfred wegener in 1912. Plate tectonics theory the upper most mantle, along with overlying crust, behaves as a strong, rigid layer. Choose from 500 different sets of plate tectonics continental drift questions flashcards on quizlet.