Plate Tectonic Theory
... part is called the crust and is divided into oceanic and continental-type crusts discussed in the next section. Asthenosphere. The upper reaches of the mantle are not solid; they are considered plastic and flow very slowly. This is due to the reduction in pressure as we approach the top of the mantl ...
... part is called the crust and is divided into oceanic and continental-type crusts discussed in the next section. Asthenosphere. The upper reaches of the mantle are not solid; they are considered plastic and flow very slowly. This is due to the reduction in pressure as we approach the top of the mantl ...
Chapter 17: Plate Tectonics
... Similar fossils of animals & plants that once lived on or near land had been found on widely separated continents Animals such as Cynognathus and Lystrasourus could not have swum the great distances that now exist between In addition, fossils from Mesosaurus, an aquatic reptile, had been found ...
... Similar fossils of animals & plants that once lived on or near land had been found on widely separated continents Animals such as Cynognathus and Lystrasourus could not have swum the great distances that now exist between In addition, fossils from Mesosaurus, an aquatic reptile, had been found ...
PowerPoint
... A. Summer causes heated air to rise over the land and a strong low-pressure cell to develop at surface. B. The rising of heated air causes a net inflow of moisture-bearing winds from the ocean bringing heavy rains to the east coast. C. The situation in the winter is exactly reverse. ...
... A. Summer causes heated air to rise over the land and a strong low-pressure cell to develop at surface. B. The rising of heated air causes a net inflow of moisture-bearing winds from the ocean bringing heavy rains to the east coast. C. The situation in the winter is exactly reverse. ...
The Planet Oceanus
... altitude in km. At 700 km above sea level one encounters an almost perfect vacuum. By definition boundary of atmosphere set at 1000 km Exosphere-the sphere above the atmosphere - is where molecules escape into space and have to pass through the magnetosphere ...
... altitude in km. At 700 km above sea level one encounters an almost perfect vacuum. By definition boundary of atmosphere set at 1000 km Exosphere-the sphere above the atmosphere - is where molecules escape into space and have to pass through the magnetosphere ...
Convergent Plate Boundaries
... • As volcanic islands increase in size • More sediment contributed to trench • Magma becomes more felsic due to melting of sediments subducted on plate • Subduction of water & sea shells in sediments adds carbon dioxide and water vapor to magma – result explosive eruptions • Island arc can be welded ...
... • As volcanic islands increase in size • More sediment contributed to trench • Magma becomes more felsic due to melting of sediments subducted on plate • Subduction of water & sea shells in sediments adds carbon dioxide and water vapor to magma – result explosive eruptions • Island arc can be welded ...
rifted margin
... The eastern North American continental margin is not a plate boundary. The continent/ocean boundary was created when Pangea rifted apart, creating a transition from continental to oceanic crust through extensional thinning and magmatic emplacement. This type of continental margin has historically be ...
... The eastern North American continental margin is not a plate boundary. The continent/ocean boundary was created when Pangea rifted apart, creating a transition from continental to oceanic crust through extensional thinning and magmatic emplacement. This type of continental margin has historically be ...
Marine Biology Exam 1 Study Guide
... Waves: crest, trough, wave height, wave length Photosynthesis & Cellular Respiration Chemosynthesis Cells Various organelles Water regulation; osmosis Possible Essay Questions: 1. Explain the steps of the scientific method including the definitions of a hypothesis and a scientific theory. 2. Explain ...
... Waves: crest, trough, wave height, wave length Photosynthesis & Cellular Respiration Chemosynthesis Cells Various organelles Water regulation; osmosis Possible Essay Questions: 1. Explain the steps of the scientific method including the definitions of a hypothesis and a scientific theory. 2. Explain ...
Key to Investigation 2: Plate Tectonics
... primarily the cause of volcanoes. Converging or colliding plates push up mountains. If plates are not locally interacting with each other, there is little geologic activity, such as in Central Australia, the Great Plains (US) and northern Europe. 1c. In most cases, plotted points will be on or very ...
... primarily the cause of volcanoes. Converging or colliding plates push up mountains. If plates are not locally interacting with each other, there is little geologic activity, such as in Central Australia, the Great Plains (US) and northern Europe. 1c. In most cases, plotted points will be on or very ...
Earth Through Time Summary Tracking Plate Motions
... An understanding of global tectonics evolved during the 20th century. Continental Drift Theory (1911-1930) was based on geologic, paleontological, and paleoclimate observations. No compelling causal mechanism was accepted. The Plate Tectonic revolution (1950s-1970) involved both new observations fro ...
... An understanding of global tectonics evolved during the 20th century. Continental Drift Theory (1911-1930) was based on geologic, paleontological, and paleoclimate observations. No compelling causal mechanism was accepted. The Plate Tectonic revolution (1950s-1970) involved both new observations fro ...
Our Planet
... that at the beginning of the Mesozoic era (200 million years ago), there was a single super-continent which was called “Pangaea” The vast Pangaea began to break up by lateral crustal movement, forming a northern continent (Laurasia) and southern continent (Gondwanaland) spearated by a long narrow oc ...
... that at the beginning of the Mesozoic era (200 million years ago), there was a single super-continent which was called “Pangaea” The vast Pangaea began to break up by lateral crustal movement, forming a northern continent (Laurasia) and southern continent (Gondwanaland) spearated by a long narrow oc ...
Unit Three Review Guide: Plate Tectonics
... Long Answer Each response should have at least 2-3 sentences MINIMUM. The more detailed your answer, the better you will do on the test. Lesson 1 Review 1. What was Pangaea? Where is it now? 2. Describe Wegner’s theory of continental drift. 3. Explain how each of the following items helps explain an ...
... Long Answer Each response should have at least 2-3 sentences MINIMUM. The more detailed your answer, the better you will do on the test. Lesson 1 Review 1. What was Pangaea? Where is it now? 2. Describe Wegner’s theory of continental drift. 3. Explain how each of the following items helps explain an ...
Geology 101 chapter2 Plate tectonics
... Convergent boundaries are of three types: oceanic-oceanic oceanic-continental continental-continental ...
... Convergent boundaries are of three types: oceanic-oceanic oceanic-continental continental-continental ...
The Changing Earth
... The earth is made of mostly of iron, nicked and rock. They are arranged in four layers; Crust: is a band of solid rock at the surface of the planet. It 25 to 30 miles thick beneath the continents & 5 to 10 miles in the oceans. Mantle: A soft layer of molten rock. It extends for 1,800 miles toward th ...
... The earth is made of mostly of iron, nicked and rock. They are arranged in four layers; Crust: is a band of solid rock at the surface of the planet. It 25 to 30 miles thick beneath the continents & 5 to 10 miles in the oceans. Mantle: A soft layer of molten rock. It extends for 1,800 miles toward th ...
Lecture Outlines PowerPoint Chapter 12 Earth Science, 12e
... • Much of Earth’s stable continental crust was created during this time – Partial melting of the mantle formed volcanic island arcs and ocean plateaus – These crustal fragments collided and accreted to form larger crustal provinces ...
... • Much of Earth’s stable continental crust was created during this time – Partial melting of the mantle formed volcanic island arcs and ocean plateaus – These crustal fragments collided and accreted to form larger crustal provinces ...
ES12_Ch12_Lecture
... • Much of Earth’s stable continental crust was created during this time – Partial melting of the mantle formed volcanic island arcs and ocean plateaus – These crustal fragments collided and accreted to form larger crustal provinces ...
... • Much of Earth’s stable continental crust was created during this time – Partial melting of the mantle formed volcanic island arcs and ocean plateaus – These crustal fragments collided and accreted to form larger crustal provinces ...
Structure of the Earth Lithosphere System In this lecture we will learn
... masses had the ability to move across the Earth's surface. ...
... masses had the ability to move across the Earth's surface. ...
Composition of Earth Outline: • Earth`s Stats and internal structure
... Mohorovičić discontinuity=“Moho” Mantle shows increase in velocity to depths 70 km below ocean 120 km below continents Sudden decrease may be due to partial melting Low velocity separates: Lithosphere=crust and uppermost mantle Asthenosphere=mantle below low velocity zone 2900 km=abrupt increase in ...
... Mohorovičić discontinuity=“Moho” Mantle shows increase in velocity to depths 70 km below ocean 120 km below continents Sudden decrease may be due to partial melting Low velocity separates: Lithosphere=crust and uppermost mantle Asthenosphere=mantle below low velocity zone 2900 km=abrupt increase in ...
continental-drift
... evidence that the climate of the northeastern United States was much warmer during the Carboniferous Period. This change in climate over time is best explained by the A) movements of tectonic plates B) effects of seasons C) changes in the environment caused by humans D) evolution of life 19. Which s ...
... evidence that the climate of the northeastern United States was much warmer during the Carboniferous Period. This change in climate over time is best explained by the A) movements of tectonic plates B) effects of seasons C) changes in the environment caused by humans D) evolution of life 19. Which s ...
Development of Plate Tectonics
... Earth is billions of years old. Earth is dynamic - The rocks and landforms that we see today evolved over a very long history, including: • mountain building • erosion • sedimentation • metamorphism • etc. However, until the second half of the 20th century, most models of the evolution of the Ea ...
... Earth is billions of years old. Earth is dynamic - The rocks and landforms that we see today evolved over a very long history, including: • mountain building • erosion • sedimentation • metamorphism • etc. However, until the second half of the 20th century, most models of the evolution of the Ea ...
Earth!!! - CanScience
... the continents we know today had once been part of an earlier supercontinent. • He called this great landmass Pangaea. ...
... the continents we know today had once been part of an earlier supercontinent. • He called this great landmass Pangaea. ...
Chapter 02 Earth Structure and Plate Tectonics
... 22. P waves travel more quickly than S waves. 23. P waves travel only along the Surface of the Earth. 24. S waves are able to travel through both solid and liquid. 25. Continental crust is generally thicker and less dense than oceanic crust. 26. The taller a mountain the deeper its root will extend ...
... 22. P waves travel more quickly than S waves. 23. P waves travel only along the Surface of the Earth. 24. S waves are able to travel through both solid and liquid. 25. Continental crust is generally thicker and less dense than oceanic crust. 26. The taller a mountain the deeper its root will extend ...
Plate Tectonics Class Notes
... it is today. There was only one super continent. Over time, the continent broke apart, becoming today’s seven continents. ...
... it is today. There was only one super continent. Over time, the continent broke apart, becoming today’s seven continents. ...
Theory of Plate Tectonics
... – Subduction occurs when one of the two converging plates descends beneath the other. – A subduction zone forms when one oceanic plate, which has become denser as a result of cooling, descends below another plate creating a deepsea trench. – The subducted plate descends into the mantle and melts. – ...
... – Subduction occurs when one of the two converging plates descends beneath the other. – A subduction zone forms when one oceanic plate, which has become denser as a result of cooling, descends below another plate creating a deepsea trench. – The subducted plate descends into the mantle and melts. – ...
Supercontinent
In geology, a supercontinent is the assembly of most or all of the Earth's continental blocks or cratons to form a single large landmass. However, the definition of a supercontinent can be ambiguous. Many tectonicists such as P.F. Hoffman (1999) use the term ""supercontinent"" to mean ""a clustering of nearly all continents"". This definition leaves room for interpretation when labeling a continental body and is easier to apply to Precambrian times. Using the first definition provided here, Gondwana (aka Gondwanaland) is not considered a supercontinent, because the landmasses of Baltica, Laurentia and Siberia also existed at the same time but physically separate from each other. The landmass of Pangaea is the collective name describing all of these continental masses when they were in a close proximity to one another. This would classify Pangaea as a supercontinent. According to the definition by Rogers and Santosh (2004), a supercontinent does not exist today. Supercontinents have assembled and dispersed multiple times in the geologic past (see table). The positions of continents have been accurately determined back to the early Jurassic. However, beyond 200 Ma, continental positions are much less certain.