Earthquakes Presentation
... The main types of seismic waves are: - compressional or P (for primary) waves - transverse or S (for secondary) waves ...
... The main types of seismic waves are: - compressional or P (for primary) waves - transverse or S (for secondary) waves ...
Evidence Statements: HS-ESS2-1
... and interacting, cause feedback effects that can increase or decrease the original changes. ESS2.B: Plate Tectonics and Large-Scale System Interactions Plate tectonics is the unifying theory that explains the past and current movements of the rocks at Earth’s surface and provides a framework for u ...
... and interacting, cause feedback effects that can increase or decrease the original changes. ESS2.B: Plate Tectonics and Large-Scale System Interactions Plate tectonics is the unifying theory that explains the past and current movements of the rocks at Earth’s surface and provides a framework for u ...
Recent Rapid Uplift of Today`s Mountains
... thinking because the driving forces responsible for mountain building are assumed to have been operating steadily at roughly the same slow rates as observed in today’s world for at least the past several hundred million years. But the uplift history of today’s mountains is anything but uniformitaria ...
... thinking because the driving forces responsible for mountain building are assumed to have been operating steadily at roughly the same slow rates as observed in today’s world for at least the past several hundred million years. But the uplift history of today’s mountains is anything but uniformitaria ...
Plate Tectonics Graham Cracker Lab File
... 3. What actually happens to crust material that is subducted (pushed below other crustal plates)? 4. What features are formed on the continent along this boundary? 5. What feature is formed in the ocean along the subduction zone? Part 3 – Convergent Plate Boundaries (Continental and Continental) 1. ...
... 3. What actually happens to crust material that is subducted (pushed below other crustal plates)? 4. What features are formed on the continent along this boundary? 5. What feature is formed in the ocean along the subduction zone? Part 3 – Convergent Plate Boundaries (Continental and Continental) 1. ...
Lecture Powerpoint 1-17
... Hydrothermal vents • 1977: discovered by Ballard and Grassle of the Woods Hole Oceanographic Institution – Chimneys – East Pacific Rise – 350 degrees Celsius ...
... Hydrothermal vents • 1977: discovered by Ballard and Grassle of the Woods Hole Oceanographic Institution – Chimneys – East Pacific Rise – 350 degrees Celsius ...
Jeopardy game
... How do Seismic waves (P and S) tell us about the composition of the earth’s core? Secondary waves can not pass through liquids so by monitoring waves from earthquakes you can detect that the outer core must be liquid. ...
... How do Seismic waves (P and S) tell us about the composition of the earth’s core? Secondary waves can not pass through liquids so by monitoring waves from earthquakes you can detect that the outer core must be liquid. ...
Document
... _____ 11. When rock layers break, the resulting surface they break and slide on is a a. wall. c. fault. b. slide. d. fold. _____ 12. When tension pulls rocks apart, it creates a a. normal fault. c. reverse fault. b. fold. d. strike-slip fault. _____ 13. When compression pushes rocks together, it cre ...
... _____ 11. When rock layers break, the resulting surface they break and slide on is a a. wall. c. fault. b. slide. d. fold. _____ 12. When tension pulls rocks apart, it creates a a. normal fault. c. reverse fault. b. fold. d. strike-slip fault. _____ 13. When compression pushes rocks together, it cre ...
The spatial extent and characteristics of block fields in Alpine areas
... Experiments using a layer of hornblendite sandwiched between two layers of moderately depleted peridotite were performed at 1.5 GPa and temperature of 1225° and 1325° C in order to simulate the reaction between melting hornblendite and adjacent mantle. At the same temperature, the silica contents of ...
... Experiments using a layer of hornblendite sandwiched between two layers of moderately depleted peridotite were performed at 1.5 GPa and temperature of 1225° and 1325° C in order to simulate the reaction between melting hornblendite and adjacent mantle. At the same temperature, the silica contents of ...
Geoscience 10: Geology of The National Parks Unit 3 - e
... breaks in upper mantle and crust (lithosphere) floating on top; ...
... breaks in upper mantle and crust (lithosphere) floating on top; ...
FREE Sample Here
... Radiometric dating reveals that the oldest oceanic crust is less than 180 million years old, whereas the oldest continental crust is approximately 4 billion years old. Fossil evidence and the thickness of sediments overlying the oceanic crust further support and confirm that ocean basins are recent ...
... Radiometric dating reveals that the oldest oceanic crust is less than 180 million years old, whereas the oldest continental crust is approximately 4 billion years old. Fossil evidence and the thickness of sediments overlying the oceanic crust further support and confirm that ocean basins are recent ...
FREE Sample Here
... Radiometric dating reveals that the oldest oceanic crust is less than 180 million years old, whereas the oldest continental crust is approximately 4 billion years old. Fossil evidence and the thickness of sediments overlying the oceanic crust further support and confirm that ocean basins are recent ...
... Radiometric dating reveals that the oldest oceanic crust is less than 180 million years old, whereas the oldest continental crust is approximately 4 billion years old. Fossil evidence and the thickness of sediments overlying the oceanic crust further support and confirm that ocean basins are recent ...
Chapter 5 The Thermal Evolution of an Earth with Strong Subduction
... 280-3]. It has been suggested that oceanic plates only thicken for 80 Ma, the age at which sea oor attening is observed to begin [e.g., Sclater et al., 1980]. If additional heat transport for older plates limits their thickness to some maximum value hm < hs, then N should be larger than that given ...
... 280-3]. It has been suggested that oceanic plates only thicken for 80 Ma, the age at which sea oor attening is observed to begin [e.g., Sclater et al., 1980]. If additional heat transport for older plates limits their thickness to some maximum value hm < hs, then N should be larger than that given ...
Secular Variation in the Composition of the Subcontinental
... The Archean-Proterozoic boundary represents a major change in the processes that form continental lithospheric mantle; since 2.5 Ga there has been a pronounced, but more gradual, secular change in the nature of these processes. Actualistic models of lithosphere formation based on modern processes ma ...
... The Archean-Proterozoic boundary represents a major change in the processes that form continental lithospheric mantle; since 2.5 Ga there has been a pronounced, but more gradual, secular change in the nature of these processes. Actualistic models of lithosphere formation based on modern processes ma ...
Structural Geology and Plate Tectonics Sections 21.1-21.6
... Continental plates float higher because they are less dense than oceanic plates. At any given time, all of the plates are in isostatic ...
... Continental plates float higher because they are less dense than oceanic plates. At any given time, all of the plates are in isostatic ...
Title
... plateaus result from the initial massive, rapid eruptions caused by these rising plumes. Such upwellings occasionally occur on the continents where we can study them directly. Exotically named regions such as the Parana Basalts of Brazil, the Deccan Traps of western India and the Siberian Traps of ...
... plateaus result from the initial massive, rapid eruptions caused by these rising plumes. Such upwellings occasionally occur on the continents where we can study them directly. Exotically named regions such as the Parana Basalts of Brazil, the Deccan Traps of western India and the Siberian Traps of ...
The Theory of Plate Tectonics
... 0Ridge Push At mid-ocean ridges, the oceanic lithosphere is higher than it is where it sinks into the .asthenosphere. Because of ridge push, the oceanic lithosphere slides downhill under the force of gravity. ...
... 0Ridge Push At mid-ocean ridges, the oceanic lithosphere is higher than it is where it sinks into the .asthenosphere. Because of ridge push, the oceanic lithosphere slides downhill under the force of gravity. ...
137 Amazing Facts of Earth Science
... mantle (Si, O, Fe, Ni) and a thin rocky crust (Si & O) 18. The lithosphere is the crust and upper mantle. 19. Ocean Crust is thinner, younger, & denser than continental crust. Oceanic crust is made of basaltic rock. 20. Convection currents move tectonic plates. Hot material rises, cools, becomes mor ...
... mantle (Si, O, Fe, Ni) and a thin rocky crust (Si & O) 18. The lithosphere is the crust and upper mantle. 19. Ocean Crust is thinner, younger, & denser than continental crust. Oceanic crust is made of basaltic rock. 20. Convection currents move tectonic plates. Hot material rises, cools, becomes mor ...
137 Amazing Facts of Earth Science
... mantle (Si, O, Fe, Ni) and a thin rocky crust (Si & O) 18. The lithosphere is the crust and upper mantle. 19. Ocean Crust is thinner, younger, & denser than continental crust. Oceanic crust is made of basaltic rock. 20. Convection currents move tectonic plates. Hot material rises, cools, becomes mor ...
... mantle (Si, O, Fe, Ni) and a thin rocky crust (Si & O) 18. The lithosphere is the crust and upper mantle. 19. Ocean Crust is thinner, younger, & denser than continental crust. Oceanic crust is made of basaltic rock. 20. Convection currents move tectonic plates. Hot material rises, cools, becomes mor ...
Document
... Types of crustal motion and deformation: Crustal heating a. Hot magma near the surface may decrease its density and cause it to bulge upward. As rocks cool they increase in density and are downwarped more by gravity b. Radioactive decay in the mantle heats up the overlying continental crust and caus ...
... Types of crustal motion and deformation: Crustal heating a. Hot magma near the surface may decrease its density and cause it to bulge upward. As rocks cool they increase in density and are downwarped more by gravity b. Radioactive decay in the mantle heats up the overlying continental crust and caus ...
Giant impacts and the initiation of plate tectonics on terrestrial
... triggering mechanism to operate. In any case, giant impacts are a ...
... triggering mechanism to operate. In any case, giant impacts are a ...
Ocean Basins
... continental and oceanic plates move in same direction at same speed examples – margins around Atlantic Ocean contain: coastal plain (was continental shelf during higher sea level) broad continental shelf continental slope and rise Collision margins continental and oceanic plates move toward each oth ...
... continental and oceanic plates move in same direction at same speed examples – margins around Atlantic Ocean contain: coastal plain (was continental shelf during higher sea level) broad continental shelf continental slope and rise Collision margins continental and oceanic plates move toward each oth ...
PPT
... continental and oceanic plates move in same direction at same speed examples – margins around Atlantic Ocean contain: coastal plain (was continental shelf during higher sea level) broad continental shelf continental slope and rise Collision margins continental and oceanic plates move toward each oth ...
... continental and oceanic plates move in same direction at same speed examples – margins around Atlantic Ocean contain: coastal plain (was continental shelf during higher sea level) broad continental shelf continental slope and rise Collision margins continental and oceanic plates move toward each oth ...
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.