INSIDE THE EARTH
... the rocks get older as you move further from the ridge. EQ6: What happens at deep-ocean trenches? Subduction occurs at deep-ocean trenches. This is where the sea floor goes back into the mantle. ...
... the rocks get older as you move further from the ridge. EQ6: What happens at deep-ocean trenches? Subduction occurs at deep-ocean trenches. This is where the sea floor goes back into the mantle. ...
Testing Plate Tectonics & Mechanisms of Plate Motion
... deep-sea drilling into the sediments on the ocean floor The data on the ages of seafloor sediment confirmed what the seafloor spreading hypothesis predicted The youngest oceanic crust is at the ridge crest and the oldest oceanic crust is at the continental margins No sediment older than 180 mi ...
... deep-sea drilling into the sediments on the ocean floor The data on the ages of seafloor sediment confirmed what the seafloor spreading hypothesis predicted The youngest oceanic crust is at the ridge crest and the oldest oceanic crust is at the continental margins No sediment older than 180 mi ...
The Solid Earth
... Continent-continental convergence Lighter continental lithosphere can’t sink into mantle Collision produces folded mountains ...
... Continent-continental convergence Lighter continental lithosphere can’t sink into mantle Collision produces folded mountains ...
9.5 Mechanisms of Plate Motion
... 9.5 Mechanisms of Plate Motion Driving force for plate movement is the unequal distribution of heat in earth. Convection – method of heat transfer in fluids where hot material rises and cold material sinks ...
... 9.5 Mechanisms of Plate Motion Driving force for plate movement is the unequal distribution of heat in earth. Convection – method of heat transfer in fluids where hot material rises and cold material sinks ...
Earth`s Structure notes 5/26/15 • Crust
... • Mantle- 80 % 0f the volume of the earth. – Upper mantle is rigid, below is the asthenosphere which is a plastic like layer on which the tectonic plates float. – There is a huge difference in temperature between the outer mantle and the inner mantle. – This difference in temperature sets up a conve ...
... • Mantle- 80 % 0f the volume of the earth. – Upper mantle is rigid, below is the asthenosphere which is a plastic like layer on which the tectonic plates float. – There is a huge difference in temperature between the outer mantle and the inner mantle. – This difference in temperature sets up a conve ...
Magma Supply Vs Magma Plumbing
... 3. Continuous plate boundaries 4. Volcanic Island chains - plates moving over fixed mantle plume (melt source) 5. Topography variations consistent with aging plates. ...
... 3. Continuous plate boundaries 4. Volcanic Island chains - plates moving over fixed mantle plume (melt source) 5. Topography variations consistent with aging plates. ...
Plate Tectonics - Chapter Review Part 1
... 4. The hypothesis of _________________________ was that all the continents once were joined as a single supercontinent and have since drifted apart. ...
... 4. The hypothesis of _________________________ was that all the continents once were joined as a single supercontinent and have since drifted apart. ...
Convection Currents and Hot Spots
... hot rock expands, decreasing its density and begins to rise; • Colder and/or denser rock sinks ...
... hot rock expands, decreasing its density and begins to rise; • Colder and/or denser rock sinks ...
HOT SPOTS - Norwich High School
... hot rock expands, decreasing its density and begins to rise; • Colder and/or denser rock sinks ...
... hot rock expands, decreasing its density and begins to rise; • Colder and/or denser rock sinks ...
Plate Tectonics.common.assessment.studyguide
... 6. When you touch a hot pot or pan, the heat moves from the pot to your hand (example) 7. Mantle or asthenosphere 8. the name of the supercontinent that existed millions of years ago 9. the continents were once joined together in a single landmass 10. evidence from landforms, fossils, and climate 11 ...
... 6. When you touch a hot pot or pan, the heat moves from the pot to your hand (example) 7. Mantle or asthenosphere 8. the name of the supercontinent that existed millions of years ago 9. the continents were once joined together in a single landmass 10. evidence from landforms, fossils, and climate 11 ...
Chapter 4 Section 3 – The Theory of Plate Tectonics
... 3) What is the force strong enough to move the plates? convection/convection currents ...
... 3) What is the force strong enough to move the plates? convection/convection currents ...
Hot Spot Volcanism on Venus, Earth and Mars
... originating from the core/mantle boundary. Possible plume-related features like the Hawaiian Islands exhibit characteristics consistent with the general predictions of the interaction of a mantle plume with a planet’s surface, including a topographic swell, abundant volcanism, and a positive gravity ...
... originating from the core/mantle boundary. Possible plume-related features like the Hawaiian Islands exhibit characteristics consistent with the general predictions of the interaction of a mantle plume with a planet’s surface, including a topographic swell, abundant volcanism, and a positive gravity ...
Mantle Plumes and Intraplate Volcanism Volcanism on the Earth
... • Apparently, the material in mantle plumes has evolved through just a few pathways. What are these? No one is certain. Some ideas: – 1. Mixing between primitive and depleted mantle – 2. Recycling of oceanic crust and sediment – 3. “Delamination” of the mantle lithosphere beneath the continents, whi ...
... • Apparently, the material in mantle plumes has evolved through just a few pathways. What are these? No one is certain. Some ideas: – 1. Mixing between primitive and depleted mantle – 2. Recycling of oceanic crust and sediment – 3. “Delamination” of the mantle lithosphere beneath the continents, whi ...
Transient plume- to continuous plate
... In the frame of plate tectonics, the East African Rift system (EARS) is the largest active tectonic structure illustrating the early stage of continental plate fragmentation. The occurrence of continental flood basalts and large topographic plateaux has long been interpreted as witnessing the key ro ...
... In the frame of plate tectonics, the East African Rift system (EARS) is the largest active tectonic structure illustrating the early stage of continental plate fragmentation. The occurrence of continental flood basalts and large topographic plateaux has long been interpreted as witnessing the key ro ...
Changing Earth Ch. 1 Review
... I’m the huge underwater mountain ranges that are present in every ocean and circle the earth. mid-ocean ridges ...
... I’m the huge underwater mountain ranges that are present in every ocean and circle the earth. mid-ocean ridges ...
Intro to Continenial Drift
... Mechanisms of Plate Motion Causes of Plate Motion Mantle Convection • Mantle plumes are masses of hotter-thannormal mantle material that ascend toward the surface, where they may lead to igneous activity. • The unequal distribution of heat within Earth causes the thermal convection in the mantle ...
... Mechanisms of Plate Motion Causes of Plate Motion Mantle Convection • Mantle plumes are masses of hotter-thannormal mantle material that ascend toward the surface, where they may lead to igneous activity. • The unequal distribution of heat within Earth causes the thermal convection in the mantle ...
Dr. Thorsten Becker, UT Austin Abstract: Plate tectonics can be
... Plate tectonics can be understood from the dynamics of the cold, top thermal boundary layer of Earth's mantle which is convecting over timescales of millions of years. However, how forces are transmitted depends on the flow strength of rocks (viscosity). For example, the low viscosity of the region ...
... Plate tectonics can be understood from the dynamics of the cold, top thermal boundary layer of Earth's mantle which is convecting over timescales of millions of years. However, how forces are transmitted depends on the flow strength of rocks (viscosity). For example, the low viscosity of the region ...
Earth`s Inner Layers Quiz
... 1) The ____________ makes up less than 1% of the Earth by mass. 2) Most of the Earth’s mass is located in the… a) mantle. b) inner core. c) outer core. d) none of these 3) The lithosphere is part of the… a) crust. b) mantle. c) crust and mantle. d) mantle and outer. core 4) The asthenosphere is easi ...
... 1) The ____________ makes up less than 1% of the Earth by mass. 2) Most of the Earth’s mass is located in the… a) mantle. b) inner core. c) outer core. d) none of these 3) The lithosphere is part of the… a) crust. b) mantle. c) crust and mantle. d) mantle and outer. core 4) The asthenosphere is easi ...
Mantle plume
A mantle plume is a mechanism proposed in 1971 to explain volcanic regions of the earth that were not thought to be explicable by the then-new theory of plate tectonics. Some such volcanic regions lie far from tectonic plate boundaries, for example, Hawaii. Others represent unusually large-volume volcanism, whether on plate boundaries, e.g. Iceland, or basalt floods such as the Deccan or Siberian traps.A mantle plume is posited to exist where hot rock nucleates at the core-mantle boundary and rises through the Earth's mantle becoming a diapir in the Earth's crust. The currently active volcanic centers are known as ""hot spots"". In particular, the concept that mantle plumes are fixed relative to one another, and anchored at the core-mantle boundary, was thought to provide a natural explanation for the time-progressive chains of older volcanoes seen extending out from some such hot spots, such as the Hawaiian–Emperor seamount chain.The hypothesis of mantle plumes from depth is not universally accepted as explaining all such volcanism. It has required progressive hypothesis-elaboration leading to variant propositions such as mini-plumes and pulsing plumes. Another hypothesis for unusual volcanic regions is the ""Plate model"". This proposes shallower, passive leakage of magma from the mantle onto the Earth's surface where extension of the lithosphere permits it, attributing most volcanism to plate tectonic processes, with volcanoes far from plate boundaries resulting from intraplate extension.