Chapter 20: Mountain Building
... 1. When did the formation of the Appalachians begin? 2. When did the plate movements reverse in forming the Appalachians? 3. According to Figure 20-11, when did the fragment that was to become the Blue Ridge Province attached to N. America? 4. According to Figure 20-11, what does the island arc that ...
... 1. When did the formation of the Appalachians begin? 2. When did the plate movements reverse in forming the Appalachians? 3. According to Figure 20-11, when did the fragment that was to become the Blue Ridge Province attached to N. America? 4. According to Figure 20-11, what does the island arc that ...
geol_15_patton_fall_..
... distance from the fault)? Where are some places that I discussed examples of earthquakes? What type of plate boundaries and what type of earthquakes were they (Denali 2002, San Francisco 1906, Aleutians 2013, Sea of Okhotsk, 2013, Pakistan 2013)? Where do earthquakes occur (related to depth of hypoc ...
... distance from the fault)? Where are some places that I discussed examples of earthquakes? What type of plate boundaries and what type of earthquakes were they (Denali 2002, San Francisco 1906, Aleutians 2013, Sea of Okhotsk, 2013, Pakistan 2013)? Where do earthquakes occur (related to depth of hypoc ...
3rd Nine Weeks Study Guide Earth + Space 6.6B Calculate density
... The upper and lower mantle make up the largest layer of the Earth. The rock in these layers are hotter than the layers above it, but high pressure prevents melting. ...
... The upper and lower mantle make up the largest layer of the Earth. The rock in these layers are hotter than the layers above it, but high pressure prevents melting. ...
Geology 8: Plate Tectonics Homework
... 79. The hypothesis, which proposed that sea floor was continually forming at the mid-ocean ridges while older sea floor was being destroyed at the trenches, was later termed: 80. The Himalayan Mountains formed when two ______________ collided. 81. The Aleutian, Mariana, and Tonga islands all contain ...
... 79. The hypothesis, which proposed that sea floor was continually forming at the mid-ocean ridges while older sea floor was being destroyed at the trenches, was later termed: 80. The Himalayan Mountains formed when two ______________ collided. 81. The Aleutian, Mariana, and Tonga islands all contain ...
Layer of the Earth
... Research: Read chapter 5, section 1 (pages 124-131) of your Earth Science textbook to learn more about the layers of the Earth. As you read, answer the following questions, label the diagram, and complete the table. ...
... Research: Read chapter 5, section 1 (pages 124-131) of your Earth Science textbook to learn more about the layers of the Earth. As you read, answer the following questions, label the diagram, and complete the table. ...
word doc leoce study guide with answers
... Canyon: Water erodes through layers of rock Sinkhole: limestone bedrock is chemically eroded (dissolves) When underground caves collapse, sinkholes form. Dunes: wind deposits sand or silt; wind can move dunes Alluvial Fans: Depositions of sediments at the base of a mountain. Fan shaped 27. Identify ...
... Canyon: Water erodes through layers of rock Sinkhole: limestone bedrock is chemically eroded (dissolves) When underground caves collapse, sinkholes form. Dunes: wind deposits sand or silt; wind can move dunes Alluvial Fans: Depositions of sediments at the base of a mountain. Fan shaped 27. Identify ...
Oceanic-Continental Boundary
... got stuck in the ice for four years. No one returned until the next century. In 1904, Roald Amundsen found the pole again and discovered that it had moved--at least 50 km since the days of Ross. The pole kept going during the 20th century, north at an average speed of 10 km per year, lately accelera ...
... got stuck in the ice for four years. No one returned until the next century. In 1904, Roald Amundsen found the pole again and discovered that it had moved--at least 50 km since the days of Ross. The pole kept going during the 20th century, north at an average speed of 10 km per year, lately accelera ...
Earth Science Introduction
... • 35 minutes to birth of Christ • 1 hour+ to pyramids • 3 hours to retreat of glaciers from Wisconsin • 12 days = 1 million years • 2 years to extinction of dinosaurs • 14 years to age of Niagara Escarpment • 31 years = 1 billion years ...
... • 35 minutes to birth of Christ • 1 hour+ to pyramids • 3 hours to retreat of glaciers from Wisconsin • 12 days = 1 million years • 2 years to extinction of dinosaurs • 14 years to age of Niagara Escarpment • 31 years = 1 billion years ...
Geology of Oceanography
... sinks at trenches as it is drawn downward by gravity and inertia (eventually it reaches the athenosphere and melts into ...
... sinks at trenches as it is drawn downward by gravity and inertia (eventually it reaches the athenosphere and melts into ...
Plate Tectonics
... Structures of Continents • continents are made and deformed by plate motion • continents are (in general) older than ocean rocks ...
... Structures of Continents • continents are made and deformed by plate motion • continents are (in general) older than ocean rocks ...
Document
... • Outer core is liquid and composed of an iron-nickel alloy. Convective flow of this fluid generates much of the Earth’s magnetic field. • Inner core is solid iron-nickel alloy. It is hotter than the outer core, but the intense pressure keeps it solid. ...
... • Outer core is liquid and composed of an iron-nickel alloy. Convective flow of this fluid generates much of the Earth’s magnetic field. • Inner core is solid iron-nickel alloy. It is hotter than the outer core, but the intense pressure keeps it solid. ...
Deep crustal structure of the northeastern margin of the Arabian
... that developed during the Cainozoic on an underlying extensional Tethyan rifted margin. It contains the world’s largest and best-exposed thrust sheet of oceanic crust and upper mantle (Semail Ophiolite), which was obducted onto the Arabian rifted continental margin during the Late Cretaceous. Althou ...
... that developed during the Cainozoic on an underlying extensional Tethyan rifted margin. It contains the world’s largest and best-exposed thrust sheet of oceanic crust and upper mantle (Semail Ophiolite), which was obducted onto the Arabian rifted continental margin during the Late Cretaceous. Althou ...
Convergent Plates - Earthquake Explorers
... 4. What is the approximate rate at which these two plates are moving towards each other each year? ____________________________ 5. What is the term for the movement of the oceanic crust beneath the continental crust? ____________________________ 6. Describe what happens to the oceanic crust that is ...
... 4. What is the approximate rate at which these two plates are moving towards each other each year? ____________________________ 5. What is the term for the movement of the oceanic crust beneath the continental crust? ____________________________ 6. Describe what happens to the oceanic crust that is ...
Why Volcanoes Form
... Where Volcanoes Form Divergent Boundary Boundary between two tectonic plates that are pulling away from each-other. Molten rock also forms submarine volcanoes The denser plates forms to make a trench Fissures form Mid-ocean ridges are formed Molten rock flows through the fissures onto th ...
... Where Volcanoes Form Divergent Boundary Boundary between two tectonic plates that are pulling away from each-other. Molten rock also forms submarine volcanoes The denser plates forms to make a trench Fissures form Mid-ocean ridges are formed Molten rock flows through the fissures onto th ...
Crustal Deformations
... another and one plate moves under the other Creates mountains, volcanoes, and ...
... another and one plate moves under the other Creates mountains, volcanoes, and ...
Extreme Earth - Introduction
... Surface tilting: recognition of changes in the land surface due to building pressure in the conduit. Earthquakes: generated as the magma moves up the feeder conduit to the vent. ...
... Surface tilting: recognition of changes in the land surface due to building pressure in the conduit. Earthquakes: generated as the magma moves up the feeder conduit to the vent. ...
Plate Boundaries
... to move) are located along the crests of oceanic ridges and can be thought of as constructive plate margins because this is where new ocean floor is generated (Figure 13). Here, two adjacent plates move away from each other, producing long, narrow fractures in the ocean crust. As a result, hot rock ...
... to move) are located along the crests of oceanic ridges and can be thought of as constructive plate margins because this is where new ocean floor is generated (Figure 13). Here, two adjacent plates move away from each other, producing long, narrow fractures in the ocean crust. As a result, hot rock ...
Sea Floor Spreading
... • Symmetric pattern of age distribution about mid-ocean ridges • Oldest ocean floor only 180 million years old ...
... • Symmetric pattern of age distribution about mid-ocean ridges • Oldest ocean floor only 180 million years old ...
Earth Revealed Plate Dynamics Video Exercise
... 12. List the three types of convergent plate boundaries. 13. What mountain range is the volcanic rock type "Andesite" named after? Where is it located. 14. True or False: volcanism occurs at both divergent and convergent plate boundaries. 15. What type of plate boundary has caused uplift of the Hima ...
... 12. List the three types of convergent plate boundaries. 13. What mountain range is the volcanic rock type "Andesite" named after? Where is it located. 14. True or False: volcanism occurs at both divergent and convergent plate boundaries. 15. What type of plate boundary has caused uplift of the Hima ...
Plate Tectonics of the Pacific Northwest
... Explore Spreading Ocean Ridges and Transform Plate Boundaries ...
... Explore Spreading Ocean Ridges and Transform Plate Boundaries ...
Continental Drift and Plate
... According to the theory of continental drift, the world was made up of a single continent through most of geologic time. That continent eventually separated and drifted apart, forming into the seven continents we have today. The first comprehensive theory of continental drift was suggested by the Ge ...
... According to the theory of continental drift, the world was made up of a single continent through most of geologic time. That continent eventually separated and drifted apart, forming into the seven continents we have today. The first comprehensive theory of continental drift was suggested by the Ge ...
Our Changing Planet
... Today it is believed that the Earth’s crust is cracked into a number of large pieces (tectonic plates). These plates are constantly moving at relative speeds of a few centimetres per year as a result of convection currents within the Earth’s mantle, driven by heat released by natural radioactive pro ...
... Today it is believed that the Earth’s crust is cracked into a number of large pieces (tectonic plates). These plates are constantly moving at relative speeds of a few centimetres per year as a result of convection currents within the Earth’s mantle, driven by heat released by natural radioactive pro ...
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.