Untitled
... At a constructive plate boundary, two plates move apart. As the two plates move apart, magma rises up to fill the gap. This causes volcanoes at this type of boundary. However, since the magma can escape easily at the surface the volcano does not erupt with much force. Earthquakes are also found at c ...
... At a constructive plate boundary, two plates move apart. As the two plates move apart, magma rises up to fill the gap. This causes volcanoes at this type of boundary. However, since the magma can escape easily at the surface the volcano does not erupt with much force. Earthquakes are also found at c ...
Document
... • Magma rising along the mid oceanic ridge exerts a force that pushes an oceanic plate away from the ridge. • The force of gravity causes plate movement by pulling cooler, denser oceanic plates down toward the mantle. • Slab push and pull work together with convection currents to move the plates. ...
... • Magma rising along the mid oceanic ridge exerts a force that pushes an oceanic plate away from the ridge. • The force of gravity causes plate movement by pulling cooler, denser oceanic plates down toward the mantle. • Slab push and pull work together with convection currents to move the plates. ...
formation of Plate tectonic theory
... The Earth's magnetic field had reversed its polarity in the past. • The discovery of Palaeomagnetic methods in the 1950’s coupled with newly developed radiometric dating techniques was a major step forward. • Showed that the continents had been moving around differently since the Mesozoic. Focussed ...
... The Earth's magnetic field had reversed its polarity in the past. • The discovery of Palaeomagnetic methods in the 1950’s coupled with newly developed radiometric dating techniques was a major step forward. • Showed that the continents had been moving around differently since the Mesozoic. Focussed ...
Plate Tectonics Vocabulary PPP- Sidney
... surface In 1915, the German geologist and meteorologist Alfred Wegener first proposed the theory of continental drift, which states that parts of the Earth's crust slowly drift atop a liquid core. The fossil record supports and gives credence to the theories of continental drift and plate tecton ...
... surface In 1915, the German geologist and meteorologist Alfred Wegener first proposed the theory of continental drift, which states that parts of the Earth's crust slowly drift atop a liquid core. The fossil record supports and gives credence to the theories of continental drift and plate tecton ...
The lithosphere, geodynamics and Archean mineral systems
... many magmatic and hydrothermal ore deposits, have been active since about 3.9Ga. The emergence of the Sub-Continental Lithospheric Mantle (SCLM) between ca 3.6–3.0 Ga provided the ability to preserve such deposits for the first time. Pristine SCLM, a residue of high temperature plume melting, is dep ...
... many magmatic and hydrothermal ore deposits, have been active since about 3.9Ga. The emergence of the Sub-Continental Lithospheric Mantle (SCLM) between ca 3.6–3.0 Ga provided the ability to preserve such deposits for the first time. Pristine SCLM, a residue of high temperature plume melting, is dep ...
7 Volcano-tectonic Interactions in Kyushu and Implications for Future
... Many previous workers have noted that most of the arc volcanoes in Kyushu (with the exception of Unzen) lie in a region generally above the 100 km contour of the subducting slab. Due to a southward increase in back-arc extension rate and southward steepening of the subducting slab, there is a south ...
... Many previous workers have noted that most of the arc volcanoes in Kyushu (with the exception of Unzen) lie in a region generally above the 100 km contour of the subducting slab. Due to a southward increase in back-arc extension rate and southward steepening of the subducting slab, there is a south ...
Ch 9 - Mr. Neason`s Earth Science
... 2. And heat from the core. How does mantle convection produce plate motion? 1. The plates are on the top part of mantle convection currents 2. The weakness of the asthenosphere allows the stiff lithosphere above to slide across it. 3. At the “top” of these convection currents, ocean plates cool and ...
... 2. And heat from the core. How does mantle convection produce plate motion? 1. The plates are on the top part of mantle convection currents 2. The weakness of the asthenosphere allows the stiff lithosphere above to slide across it. 3. At the “top” of these convection currents, ocean plates cool and ...
File - Hoblitzell`s Science Spot
... EX: MORs - Mid-Atlantic Ridge - North America & Europe slowly moving away from each other EX: On Land - East African Rift Valley - valley formed where plates are separating ...
... EX: MORs - Mid-Atlantic Ridge - North America & Europe slowly moving away from each other EX: On Land - East African Rift Valley - valley formed where plates are separating ...
platetectonics
... The Mariana Trench is the deepest part of the world's oceans, and the lowest elevation of the surface of the Earth's crust. ...
... The Mariana Trench is the deepest part of the world's oceans, and the lowest elevation of the surface of the Earth's crust. ...
Arc Magmatism
... • Activity along arcuate volcanic island chains along subduction zones • Distinctly different from the mainly basaltic provinces – Composition more diverse and silicic – Basalt generally occurs in subordinate quantities – More explosive than the quiescent basalts – Strato-volcanoes are the most comm ...
... • Activity along arcuate volcanic island chains along subduction zones • Distinctly different from the mainly basaltic provinces – Composition more diverse and silicic – Basalt generally occurs in subordinate quantities – More explosive than the quiescent basalts – Strato-volcanoes are the most comm ...
Plate Tectonics and Continental Drift
... Magma rises forming a magmatic arc with the continent (rather than a island arc). e. Andesitic volcanism occurs ...
... Magma rises forming a magmatic arc with the continent (rather than a island arc). e. Andesitic volcanism occurs ...
ES 5-4 HW ss Sea Flr 12
... The longest chain of mountains in the world is the system of mid-ocean ridges. In the mid-1900s, scientists mapped the mid-ocean ridges using sonar. Sonar is a device that bounces sound waves off underwater objects and then records the echoes of these sound waves. The mid-ocean ridges curve along th ...
... The longest chain of mountains in the world is the system of mid-ocean ridges. In the mid-1900s, scientists mapped the mid-ocean ridges using sonar. Sonar is a device that bounces sound waves off underwater objects and then records the echoes of these sound waves. The mid-ocean ridges curve along th ...
Oreo Cookies and Plate Tectonics
... a builder or architect. Plate tectonics suggests that large features on Earth’s surface, such as continents, ocean basins, and mountain ranges, result from interactions along the edges of large plates of Earth’s outer shell. This outer shell is called the lithosphere from the Greek “lithos,” meaning ...
... a builder or architect. Plate tectonics suggests that large features on Earth’s surface, such as continents, ocean basins, and mountain ranges, result from interactions along the edges of large plates of Earth’s outer shell. This outer shell is called the lithosphere from the Greek “lithos,” meaning ...
Lecture 25
... ) Some along-arc as well Antilles → more alkaline N → S Aleutians is segmented with C-A prevalent in segments and tholeiite prevalent at ends ...
... ) Some along-arc as well Antilles → more alkaline N → S Aleutians is segmented with C-A prevalent in segments and tholeiite prevalent at ends ...
Divergent boundaries
... shortly after its formation 4.6 billion years ago. The Earth's unchanging size implies that the crust must be destroyed at about the same rate as it is being created, as Harry Hess surmised. Such destruction (recycling) of ...
... shortly after its formation 4.6 billion years ago. The Earth's unchanging size implies that the crust must be destroyed at about the same rate as it is being created, as Harry Hess surmised. Such destruction (recycling) of ...
Plate Tectonics 10.2
... drift and sea-floor spreading led to the development of a theory called plate tectonics. • Plate tectonics: Theory that Earth's outer shell is divided into several plates that are in motion (glide) over the mantle • Helps explains why and how continents move and is the study of the formation of feat ...
... drift and sea-floor spreading led to the development of a theory called plate tectonics. • Plate tectonics: Theory that Earth's outer shell is divided into several plates that are in motion (glide) over the mantle • Helps explains why and how continents move and is the study of the formation of feat ...
Slide 1
... OCEANIC – OCEANIC • The more dense of the 2 will go under and form a subduction zone / OCEAN TRENCH • The new mantle material produced from the melting of the subducted plate will eventually resurface to produce chain of volcanic islands on the ocean floor called ISLAND ARCS • As magma accumulates ...
... OCEANIC – OCEANIC • The more dense of the 2 will go under and form a subduction zone / OCEAN TRENCH • The new mantle material produced from the melting of the subducted plate will eventually resurface to produce chain of volcanic islands on the ocean floor called ISLAND ARCS • As magma accumulates ...
9.3 Actions at Plate Boundaries
... These stretching forces by themselves are not large enough to actually tear the lithosphere apart. Rather, the rupture of the lithosphere is thought to begin in those areas where plumes of hot rock rise from the mantle. This hot-spot activity weakens the lithosphere and creates domes in the crust di ...
... These stretching forces by themselves are not large enough to actually tear the lithosphere apart. Rather, the rupture of the lithosphere is thought to begin in those areas where plumes of hot rock rise from the mantle. This hot-spot activity weakens the lithosphere and creates domes in the crust di ...
Convergent Plates - Earthquake Explorers
... 1. What type of tectonic plate boundary is found where the Nazca plate meets the South American plate? (i.e. name the boundary type) ______________________________________________________________ 2. What type of crustal material is present in the (i.e. oceanic or continental): (a) Nazca plate: _____ ...
... 1. What type of tectonic plate boundary is found where the Nazca plate meets the South American plate? (i.e. name the boundary type) ______________________________________________________________ 2. What type of crustal material is present in the (i.e. oceanic or continental): (a) Nazca plate: _____ ...
Questions
... Some seismic waves–energy associated with earthquakes–can pass through Earth. Analysis of how these waves are changed, and the time required for their passage, has told researchers much about conditions inside Earth. Earth is composed of concentric spherical layers, with the least dense layer on the ...
... Some seismic waves–energy associated with earthquakes–can pass through Earth. Analysis of how these waves are changed, and the time required for their passage, has told researchers much about conditions inside Earth. Earth is composed of concentric spherical layers, with the least dense layer on the ...
plate tectonics - Hobbs High School
... • Denser oceanic slab sinks into the asthenosphere. A subduction zone occurs when one oceanic plate is forced down into the mantle underneath a second plate. • Pockets of magma develop and rise to the surface. • Continental volcanic arcs form in part by volcanic activity caused by the subduction of ...
... • Denser oceanic slab sinks into the asthenosphere. A subduction zone occurs when one oceanic plate is forced down into the mantle underneath a second plate. • Pockets of magma develop and rise to the surface. • Continental volcanic arcs form in part by volcanic activity caused by the subduction of ...
File - Coach Marker`s World of earth Science
... The rigid lithospheric plates move constantly, but slowly (centimeters per year) on top of the asthenosphere. As the plates move around, they push into each other, move away from each other, or slide past each other along their boundaries. There are many possible forces driving these motions, includ ...
... The rigid lithospheric plates move constantly, but slowly (centimeters per year) on top of the asthenosphere. As the plates move around, they push into each other, move away from each other, or slide past each other along their boundaries. There are many possible forces driving these motions, includ ...
EARTH SYSTEMS SCIENCE LECTURE TEST # 2
... 29. ? is the direction of a horizontal line in the plane of bedding. A.strike B.dip C.this describes both strike and dip 30. The Hawaiian Islands are examples of a ? plate boundary. A.divergent B.oceanic-oceanic convergent C.oceanic-continental convergent D.transform E.the Hawaiian Islands are not a ...
... 29. ? is the direction of a horizontal line in the plane of bedding. A.strike B.dip C.this describes both strike and dip 30. The Hawaiian Islands are examples of a ? plate boundary. A.divergent B.oceanic-oceanic convergent C.oceanic-continental convergent D.transform E.the Hawaiian Islands are not a ...
Oceanic trench
The oceanic trenches are hemispheric-scale long but narrow topographic depressions of the sea floor. They are also the deepest parts of the ocean floor. Oceanic trenches are a distinctive morphological feature of convergent plate boundaries, along which lithospheric plates move towards each other at rates that vary from a few mm to over ten cm per year. A trench marks the position at which the flexed, subducting slab begins to descend beneath another lithospheric slab. Trenches are generally parallel to a volcanic island arc, and about 200 km (120 mi) from a volcanic arc. Oceanic trenches typically extend 3 to 4 km (1.9 to 2.5 mi) below the level of the surrounding oceanic floor. The greatest ocean depth to be sounded is in the Challenger Deep of the Mariana Trench, at a depth of 11,034 m (36,201 ft) below sea level. Oceanic lithosphere moves into trenches at a global rate of about 3 km2/yr.