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Class notes: Earth`s Interior
Class notes: Earth`s Interior

... Seismic waves are used to study the interior of the Earth They show several layers or zones inside Earth (Similar to X-rays) The deepest drill hole on Earth is only 12-16 km Less than 0.2 % of the distance to the core Layers of the Earth (See ESRT page 10) ...
Astronomy - Geneva 304
Astronomy - Geneva 304

... 3. Draw two red arrows to indicate the direction of plate movement along the ridge. (0.25 points) ...
9 - Cengage
9 - Cengage

... The light, ancient granitic continents ride high in the lithospheric plates, rafting on the moving asthenosphere below. In subduction, heavy basaltic ocean floor (and its overlying layer of sediment) plunges into the mantle at a subduction zone to be partially remelted, but the light granitic contin ...
Topic 3 Notes - Gouverneur Central School District
Topic 3 Notes - Gouverneur Central School District

... Uplift- the strata is raised up, ex. marine fossils found in the mountains Subsidence- the strata sinks, ex. Land derived or shallow ocean fossils found in deeper ocean Passive margin basin- shallow basin where sediment is deposited, not at a plate boundary, the crust subsides Isostacy- lithosphere ...
The Theory of Plate Tectonics
The Theory of Plate Tectonics

... 2. Divergent boundaries occur where two plates slide apart from each other. Midocean ridges (e.g., Mid-Atlantic Ridge) and active zones of rifting (such as Africa's Great Rift Valley) are both examples of divergent boundaries. 3. Convergent boundaries (or active margins) occur where two plates slide ...
Plate Motion
Plate Motion

...  Aleutian Islands /Aleutian Trench in the North Pacific Ocean ...
PLATE TECTONICS
PLATE TECTONICS

... several times at divergent boundaries. ...
Theory of Plate tectonics
Theory of Plate tectonics

... Transform Plate Boundaries • These are where plates move side-to-side. ...
Earth 50: Plate Tectonics 9-25-06 Continental Drift James Hutton
Earth 50: Plate Tectonics 9-25-06 Continental Drift James Hutton

... Benioff Zone: The zone from the trench to a depth of ~670 km in which earthquakes are associated with the subducting slab; deeper than this, flow between the slab and surrounding rocks is probably too plastic to generate earthquakes. In Continent-continent convergent margins, two continents collide. ...
Oceanic Crust
Oceanic Crust

... continental lithosphere • Oceanic lithosphere heats and dehydrates as it subsides • The melt rises forming volcanism • E.g. The Andes ...
Earthquake Unit Assessment Retake Preparation
Earthquake Unit Assessment Retake Preparation

... 3) Draw diagrams of the three types of plate boundaries: convergent (C-C, O-C, O-O), divergent (O-O, transform (any combination); then, write the characteristics of each. ...
Chapter 10-3 - Theory of Plate Tectonics
Chapter 10-3 - Theory of Plate Tectonics

... Turn to page 283 in your text to help you see more of the Divergent Boundaries↓ Convergent Boundaries↓ “Constructive” “Destructive” Boundary between 2 plates 2 plates get together and that are moving apart. the older lithosphere is Ex. Seafloor spreading destroyed. ...
D-1_Study_Guide_2014
D-1_Study_Guide_2014

... 16. What does the Richter scale measure? _________________________________________________ 17. Which earthquake waves cause the greatest amount of damage to buildings, roads, and other surface features? ____________________________________ 18. What commonly occurs along a transform boundary________ ...
Name - RCSD
Name - RCSD

... 16. What does the Richter scale measure? _________________________________________________ 17. Which earthquake waves cause the greatest amount of damage to buildings, roads, and other surface features? ____________________________________ 18. What commonly occurs along a transform boundary________ ...
Part B - Bakersfield College
Part B - Bakersfield College

... north pole. Evidence shows north pole switches location to the south pole over geologic time (magnetic reversals). ...
1 MAY 2011 Oceanogra phy Ch 2 Plate Tectonics and the Ocean
1 MAY 2011 Oceanogra phy Ch 2 Plate Tectonics and the Ocean

...  Hot Spots and Mantle Plumes. Volcanoes near the middle of plates (Hawaii). Some plumes are sourced from the core- mantle boundary, while others are from much shallower depths. Many >100 hot spots do not coincide with plate boundaries. Many occur near divergent boundaries where the lithosphere is t ...
Name:
Name:

... 1. What is a volcano? ________________________________________________________________ 2. A molten mixture of rock-forming substance, gases, and water from the mantle is referred to as __________. 3. When magma reaches the surface, it is called ___________. Volcanoes and Plate Boundaries (p. 217-218 ...
File - Ms Hicks` Classes
File - Ms Hicks` Classes

... • The plates are pushing toward each other • Ex: the boundary between the Eurasian and the Indian plates under the Himalayas ...
Name: #: Date: Section: HR: Inside Earth WebQuest: Worksheet Part
Name: #: Date: Section: HR: Inside Earth WebQuest: Worksheet Part

... What new information led to the theory of plate tectonics? ...
Aim: How do the different types of plate boundaries differ?
Aim: How do the different types of plate boundaries differ?

... to help you name them.) ...
Dynamic Crust 4 Plate Tectonics
Dynamic Crust 4 Plate Tectonics

... Widely accepted theory for plate movement in scientific community.  Earth’s ...
Unit 4.PlateTectonics Regents Review Packet Answers
Unit 4.PlateTectonics Regents Review Packet Answers

... continents were once joined together as Pangaea and separated to their current positions. Evidences: 1) Continents coastlines fit together like a puzzle. 2) Same fossils (plant and animal), rocks types, mountain ranges, and glacial striations found on different continents. 3) Coal deposits found in ...
Slide 1
Slide 1

... How are volcanoes formed? • Plate movement • Subduction zones ...
Plate Tectonics Earth`s outer shell, the lithosphere, long thought to
Plate Tectonics Earth`s outer shell, the lithosphere, long thought to

... When an oceanic plate pushes into and subducts under a continental plate, the overriding continental plate is lifted up and a mountain range is created. Even though the oceanic plate as a whole sinks smoothly and continuously into the subduction trench, the deepest part of the subducting plate break ...
Plate Tectonics Earth`s outer shell, the lithosphere, long
Plate Tectonics Earth`s outer shell, the lithosphere, long

... When an oceanic plate pushes into and subducts under a continental plate, the overriding continental plate is lifted up and a mountain range is created. Even though the oceanic plate as a whole sinks smoothly and continuously into the subduction trench, the deepest part of the subducting plate break ...
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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.
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