Fold Mountains Fault-Block Mountains Volcanoes
... Dome mountains are formed when magma rises from inside the Earth but does not come through the surface. Instead, the magma pushes up the Earth's crust. Eventually, the magma cools and goes hard. A dome mountain usually forms a dome shape. Dome mountains are usually surrounded by flat land. Sometimes ...
... Dome mountains are formed when magma rises from inside the Earth but does not come through the surface. Instead, the magma pushes up the Earth's crust. Eventually, the magma cools and goes hard. A dome mountain usually forms a dome shape. Dome mountains are usually surrounded by flat land. Sometimes ...
Chapter 1 Study Guide – Introduction To Earth Science 1. For a
... 6. The asthenosphere and lithosphere are parts of Earth’s a. geosphere. c. hydrosphere. b. biosphere. d. atmosphere. 7. What are the three main parts of the geosphere? a. atmosphere, crust, core c. crust, mantle, core b. lithosphere, mantle, core d. asthenosphere, lithosphere, atmosphere 8. The theo ...
... 6. The asthenosphere and lithosphere are parts of Earth’s a. geosphere. c. hydrosphere. b. biosphere. d. atmosphere. 7. What are the three main parts of the geosphere? a. atmosphere, crust, core c. crust, mantle, core b. lithosphere, mantle, core d. asthenosphere, lithosphere, atmosphere 8. The theo ...
Document
... 1. Describe how the rate of seafloor spreading has been calculated at constructive plate boundaries and at hotspots. 2. Describe and explain how oceanic lithosphere may be absorbed back into the mantle. ...
... 1. Describe how the rate of seafloor spreading has been calculated at constructive plate boundaries and at hotspots. 2. Describe and explain how oceanic lithosphere may be absorbed back into the mantle. ...
Inside Earth: Chapter 1
... pieces of Earth’s crust are in constant, slow motion, driven by convection currents in the mantle • Convection Currents: The movement of a fluid, caused by differences in temperature and density, that transfers heat from one part of the fluid to another EQ: What is the theory of plate tectonics? ...
... pieces of Earth’s crust are in constant, slow motion, driven by convection currents in the mantle • Convection Currents: The movement of a fluid, caused by differences in temperature and density, that transfers heat from one part of the fluid to another EQ: What is the theory of plate tectonics? ...
geology of the pacific northwest
... divergent boundaries, magma pushes through, cools, and forms new crust. The lithosphere is like a rigid board, though, and as two plates move apart, the other end of each plate collides with another lithosphere. At the collision, one plate is subducted, or pushed under, and melts. So lithosphere is ...
... divergent boundaries, magma pushes through, cools, and forms new crust. The lithosphere is like a rigid board, though, and as two plates move apart, the other end of each plate collides with another lithosphere. At the collision, one plate is subducted, or pushed under, and melts. So lithosphere is ...
Seafloor spreading model
... 8. Ask students to get out their color coded World Earthquake Maps. 9. Tell them that their job, in teams of 2 or 3, is to see if they can figure out which direction each plate is moving using the information on their maps (earthquake epicenter locations, volcano zones, mid-ocean ridge locations). T ...
... 8. Ask students to get out their color coded World Earthquake Maps. 9. Tell them that their job, in teams of 2 or 3, is to see if they can figure out which direction each plate is moving using the information on their maps (earthquake epicenter locations, volcano zones, mid-ocean ridge locations). T ...
Project #1: Inversion of multiple geophysical data for composition
... structure of the Earth's upper mantle. One of the main challenges concerning the Earth’s upper mantle is the determination of its present-day thermal and compositional structure. This information represents the basis for any evolutionary model of the Earth, as well as for understanding the relations ...
... structure of the Earth's upper mantle. One of the main challenges concerning the Earth’s upper mantle is the determination of its present-day thermal and compositional structure. This information represents the basis for any evolutionary model of the Earth, as well as for understanding the relations ...
chapter 12.1 notes
... • Wilson then unified the ideas of Wegener and Hess into the plate tectonic theory. Continental drift occurs because of areas like these ridges, that push along tectonic plates floating on Earth’s surface. geologic ______________ are anywhere magma rises to Earth’s surface. • A geologic hot spo ...
... • Wilson then unified the ideas of Wegener and Hess into the plate tectonic theory. Continental drift occurs because of areas like these ridges, that push along tectonic plates floating on Earth’s surface. geologic ______________ are anywhere magma rises to Earth’s surface. • A geologic hot spo ...
Chapter 19 - Heritage Collegiate
... Alfred Wegener noticed that the continents seemed to fit together like a jigsaw puzzle. Around 1915, he proposed a hypothesis, called continental drift, which stated that about 200 million years ago, a supercontinent called Pangaea (see Figure 19.2 p. 515 text) began to break apart and that the cont ...
... Alfred Wegener noticed that the continents seemed to fit together like a jigsaw puzzle. Around 1915, he proposed a hypothesis, called continental drift, which stated that about 200 million years ago, a supercontinent called Pangaea (see Figure 19.2 p. 515 text) began to break apart and that the cont ...
Chapter 1 Introduction
... Figure 1-3. Variation in P and S wave velocities with depth. Compositional subdivisions of the Earth are on the left, rheological subdivisions on the right. After Kearey and Vine (1990), Global Tectonics. © Blackwell Scientific. Oxford. ...
... Figure 1-3. Variation in P and S wave velocities with depth. Compositional subdivisions of the Earth are on the left, rheological subdivisions on the right. After Kearey and Vine (1990), Global Tectonics. © Blackwell Scientific. Oxford. ...
Chapter_1_Section1
... Geologists – scientists who study the forces that make and shape the planet Earth Rock – the material that forms Earth’s hard surface Geologists study: the processes that create Earth’s features search for clues about Earth’s history study the chemical and physical properties of rock map where diffe ...
... Geologists – scientists who study the forces that make and shape the planet Earth Rock – the material that forms Earth’s hard surface Geologists study: the processes that create Earth’s features search for clues about Earth’s history study the chemical and physical properties of rock map where diffe ...
Why do earthquakes and volcanoes occur in certain places?
... These plates are moved by the currents in the hot rocks below the surface. The edges of plates are called margins or boundaries. ...
... These plates are moved by the currents in the hot rocks below the surface. The edges of plates are called margins or boundaries. ...
Sea Floor Spreading
... • Sound waves were sent to the bottom of the ocean floor. • The longer it took the deeper the water. ...
... • Sound waves were sent to the bottom of the ocean floor. • The longer it took the deeper the water. ...
The Rock Cycle
... sediment kept piling on top of us, squeezing and cementing us together. The pressure became intense. Over many, many years we began to form into a sedimentary rock. Picture 7 (Shale, a Sedimentary Rock) ...
... sediment kept piling on top of us, squeezing and cementing us together. The pressure became intense. Over many, many years we began to form into a sedimentary rock. Picture 7 (Shale, a Sedimentary Rock) ...
Earth`s Interior and Geophysical Properties
... - low velocity zone ---> marks boundary of Asthenosphere b. Asthenosphere - low velocity zone (geophysical term) - rocks are close to melting point - which is controlled by T and P - may be partially molten - crystal and liquid slush - makes them weaker - can be deformed in a ductile manner c. Lower ...
... - low velocity zone ---> marks boundary of Asthenosphere b. Asthenosphere - low velocity zone (geophysical term) - rocks are close to melting point - which is controlled by T and P - may be partially molten - crystal and liquid slush - makes them weaker - can be deformed in a ductile manner c. Lower ...
Fulltext PDF
... move in different directions and at different speeds from those of the neighbouring ones. Sometimes, the plate in the front is slower; then, the plate behind it comes and collides (and mountains are formed). On the other hand, sometimes two plates move away from one another (and rifts are created). ...
... move in different directions and at different speeds from those of the neighbouring ones. Sometimes, the plate in the front is slower; then, the plate behind it comes and collides (and mountains are formed). On the other hand, sometimes two plates move away from one another (and rifts are created). ...
oceanic crust
... rises to the surface from the asthenosphere below • This new crust is very hot and so less dense than older oceanic (basaltic) crust; as a result it rises high as a ridge system in the center of our oceans ...
... rises to the surface from the asthenosphere below • This new crust is very hot and so less dense than older oceanic (basaltic) crust; as a result it rises high as a ridge system in the center of our oceans ...
PPT
... series of concentric layers or spheres which differ in chemistry and physical properties. ...
... series of concentric layers or spheres which differ in chemistry and physical properties. ...
File
... explains these movements is called "plate tectonics." It was developed in the mid 1960s by geophysicists. The term "plate" refers to large rigid blocks of the Earth's surface which appear to move as a unit. These plates may include both oceans and continents. When the plates move, the continents and ...
... explains these movements is called "plate tectonics." It was developed in the mid 1960s by geophysicists. The term "plate" refers to large rigid blocks of the Earth's surface which appear to move as a unit. These plates may include both oceans and continents. When the plates move, the continents and ...
Unit 1: Basics of Geography Chapter 2
... • Naturally formed features on the surface of the earth – Examples??? ...
... • Naturally formed features on the surface of the earth – Examples??? ...
PLATE TECTONICS and OCEANS
... Vine-Matthews-Morley Theory • If we assume sea-floor spreading is occurring, the magnetic field of the rock is fixed, in alignment with the earth’s field, at the time the rock cools • The measured field above such rocks equals the earth’s field plus the rock’s field (because they are aligned) ...
... Vine-Matthews-Morley Theory • If we assume sea-floor spreading is occurring, the magnetic field of the rock is fixed, in alignment with the earth’s field, at the time the rock cools • The measured field above such rocks equals the earth’s field plus the rock’s field (because they are aligned) ...
2How Is Continental Movement Explained by Plate Tectonics?
... map. Where are most of these boundaries located? The top picture on the right shows how plates move at a spreading boundary and what the result can be. The Great Rift Valley in Africa is one place where new crust is being added to the earth's surface. As the crust builds up, it forms a wider and dee ...
... map. Where are most of these boundaries located? The top picture on the right shows how plates move at a spreading boundary and what the result can be. The Great Rift Valley in Africa is one place where new crust is being added to the earth's surface. As the crust builds up, it forms a wider and dee ...
ACTIVITIES PART 1 – Types of Plate Boundaries Go to the website
... around 150 million years ago, when all the continents were together forming the “supercontinent” Pangea, and how the plates moved through time to their ...
... around 150 million years ago, when all the continents were together forming the “supercontinent” Pangea, and how the plates moved through time to their ...
ppt link
... Two plates colliding….one usually goes down. Subduction –usually when an ocean plate collides with a continental plate the Ocean plate “subducts” under the continental plate. Over-riding –usually when a continental plate collides with another continental plate. One of the plates usually subducts, bu ...
... Two plates colliding….one usually goes down. Subduction –usually when an ocean plate collides with a continental plate the Ocean plate “subducts” under the continental plate. Over-riding –usually when a continental plate collides with another continental plate. One of the plates usually subducts, bu ...
S05Exam3
... T F 31. During the twentieth century, earthquakes and their effects killed approximately the same number of people (within 10%) as volcanic eruptions and their effects. T F 32. Seismic gaps along major and trends in migration of earthquakes with time along major faults can be used as predictors of f ...
... T F 31. During the twentieth century, earthquakes and their effects killed approximately the same number of people (within 10%) as volcanic eruptions and their effects. T F 32. Seismic gaps along major and trends in migration of earthquakes with time along major faults can be used as predictors of f ...
Plate tectonics
Plate tectonics (from the Late Latin tectonicus, from the Greek: τεκτονικός ""pertaining to building"") is a scientific theory that describes the large-scale motion of Earth's lithosphere. This theoretical model builds on the concept of continental drift which was developed during the first few decades of the 20th century. The geoscientific community accepted the theory after the concepts of seafloor spreading were later developed in the late 1950s and early 1960s.The lithosphere, which is the rigid outermost shell of a planet (on Earth, the crust and upper mantle), is broken up into tectonic plates. On Earth, there are seven or eight major plates (depending on how they are defined) and many minor plates. Where plates meet, their relative motion determines the type of boundary; convergent, divergent, or transform. Earthquakes, volcanic activity, mountain-building, and oceanic trench formation occur along these plate boundaries. The lateral relative movement of the plates typically varies from zero to 100 mm annually.Tectonic plates are composed of oceanic lithosphere and thicker continental lithosphere, each topped by its own kind of crust. Along convergent boundaries, subduction carries plates into the mantle; the material lost is roughly balanced by the formation of new (oceanic) crust along divergent margins by seafloor spreading. In this way, the total surface of the globe remains the same. This prediction of plate tectonics is also referred to as the conveyor belt principle. Earlier theories (that still have some supporters) propose gradual shrinking (contraction) or gradual expansion of the globe.Tectonic plates are able to move because the Earth's lithosphere has greater strength than the underlying asthenosphere. Lateral density variations in the mantle result in convection. Plate movement is thought to be driven by a combination of the motion of the seafloor away from the spreading ridge (due to variations in topography and density of the crust, which result in differences in gravitational forces) and drag, with downward suction, at the subduction zones. Another explanation lies in the different forces generated by the rotation of the globe and the tidal forces of the Sun and Moon. The relative importance of each of these factors and their relationship to each other is unclear, and still the subject of much debate.