seismic waves notes-0 - Fort Thomas Independent Schools
... • Mantle: iron-rich rock (FeMg-Peridotite) [3.3–5.7 g/cm3] • Crust: aluminum and magnesium rich rock • Continental Crust: SiAl (rock) less dense [2.7 g/cm3] • Oceanic Crust: SiMa (rock) darker, more dense [3.0 g/cm3] ...
... • Mantle: iron-rich rock (FeMg-Peridotite) [3.3–5.7 g/cm3] • Crust: aluminum and magnesium rich rock • Continental Crust: SiAl (rock) less dense [2.7 g/cm3] • Oceanic Crust: SiMa (rock) darker, more dense [3.0 g/cm3] ...
Structure of Earth
... than the continental sections. It is generally high in magnesium, calcium, and iron, but lower in silicon. The crust in the continents is 30–100 km thick, is less dense than the sea floor crust, and contains more silicon. Under the crust lies the mantle, nearly 3000 km thick. There are three layers ...
... than the continental sections. It is generally high in magnesium, calcium, and iron, but lower in silicon. The crust in the continents is 30–100 km thick, is less dense than the sea floor crust, and contains more silicon. Under the crust lies the mantle, nearly 3000 km thick. There are three layers ...
Sea-Floor Spreading
... Sonar: a device that bounces sound waves off underwater objects and then records the echoes of these sound waves. Scientists used this to map the ocean floor. The time it takes for the echo to arrive indicates the distance from you to an object. Mid-ocean ridges curve along the sea floor and ...
... Sonar: a device that bounces sound waves off underwater objects and then records the echoes of these sound waves. Scientists used this to map the ocean floor. The time it takes for the echo to arrive indicates the distance from you to an object. Mid-ocean ridges curve along the sea floor and ...
Earth`s Layers Online Activity http://homepage.mac.com/cohora/ext
... 8. The Inner core is under so much pressure it does not move like a liquid, it Write the temperature of the center of the Earth. 9. A scientist who studies rocks is called a ____________________________________. What does a Geomorphologist study? ...
... 8. The Inner core is under so much pressure it does not move like a liquid, it Write the temperature of the center of the Earth. 9. A scientist who studies rocks is called a ____________________________________. What does a Geomorphologist study? ...
e-Science Teachers Pack - Faculty of Sciences
... You want the students to realise (if they didn’t already know) that all of the continents on the Earth are on top of tectonic plates. You may want to show some images of how the tectonic plates are laid out in comparison to the continents. Ask the students if they know what causes the changes to the ...
... You want the students to realise (if they didn’t already know) that all of the continents on the Earth are on top of tectonic plates. You may want to show some images of how the tectonic plates are laid out in comparison to the continents. Ask the students if they know what causes the changes to the ...
The Layer`s Of The Earth!
... the skin of an apple. It is very thin compared to the other three layers. *The crust makes up 1% of the Earth. * The crust of the Earth is broken into many pieces called plates. ...
... the skin of an apple. It is very thin compared to the other three layers. *The crust makes up 1% of the Earth. * The crust of the Earth is broken into many pieces called plates. ...
INDEPTH4-Summary v 10
... this region have been cited to argue that a) uplift is due to internal imbricate “stacking” of Asian crust while b) Asian continental lithosphere is being detached and “subducted” into the Tibetan mantle. Such models contrast with a competing paradigm, derived primarily from observations in the sout ...
... this region have been cited to argue that a) uplift is due to internal imbricate “stacking” of Asian crust while b) Asian continental lithosphere is being detached and “subducted” into the Tibetan mantle. Such models contrast with a competing paradigm, derived primarily from observations in the sout ...
Slide 1
... The plate tectonics theory was first proposed by Alfred Wegener, a German meteorologist, in 1912 ~ It is the concept that the Earth’s crust is composed of rigid plates that move over a less rigid interior. ...
... The plate tectonics theory was first proposed by Alfred Wegener, a German meteorologist, in 1912 ~ It is the concept that the Earth’s crust is composed of rigid plates that move over a less rigid interior. ...
Podcast Outline Key - KMS 8th Science
... not in the Allegheny Mountains as that is no longer an active convergent Himalayas or boundary) Allegheny/Appalachian Mountains ...
... not in the Allegheny Mountains as that is no longer an active convergent Himalayas or boundary) Allegheny/Appalachian Mountains ...
oceans - Sir C R R College
... This involves the spreading of ocean-floor on either side of the mid-oceanic ridges (huge mountain chains buried under ocean water) and creation of new crust at the spreading centers. ...
... This involves the spreading of ocean-floor on either side of the mid-oceanic ridges (huge mountain chains buried under ocean water) and creation of new crust at the spreading centers. ...
Palaeoproterozoic Crustal Evolution of the Southern Eyre Peninsula
... Australian Proterozoic terrains (eg, Etheridge et al., 1987), suggesting significantly different mechanisms for both crustal growth and return of continental material to the mantle than presently in operation on the plate tectonic earth. Most scenarios however, involve mass balance arguments that re ...
... Australian Proterozoic terrains (eg, Etheridge et al., 1987), suggesting significantly different mechanisms for both crustal growth and return of continental material to the mantle than presently in operation on the plate tectonic earth. Most scenarios however, involve mass balance arguments that re ...
Lab 2 - Plate TectonicsOct.2014
... The magmas that produce oceanic island volcanism are believed to be generated by a "hotspot" beneath the oceanic lithosphere, in the asthenosphere. This hotspot is caused by the upwelling in the deep mantle (Figure 2-4). In time, this magma migrates through the lithosphere to the surface. Because mo ...
... The magmas that produce oceanic island volcanism are believed to be generated by a "hotspot" beneath the oceanic lithosphere, in the asthenosphere. This hotspot is caused by the upwelling in the deep mantle (Figure 2-4). In time, this magma migrates through the lithosphere to the surface. Because mo ...
Marine Provinces
... Formed by plate convergence Most trenches are in the Pacific Ocean Associated with volcanic arcs Island arc Continental arc ...
... Formed by plate convergence Most trenches are in the Pacific Ocean Associated with volcanic arcs Island arc Continental arc ...
of the same age is form in southern Africa, South America, India, and
... within the continents that scientists began to recognize in the early-mid 1900s. Let’s look through some of those. Fit of the continents: In the 1960s, it was recognized that, especially if you take the continental slope into account, the continents fit together incredibly well. Just look at South A ...
... within the continents that scientists began to recognize in the early-mid 1900s. Let’s look through some of those. Fit of the continents: In the 1960s, it was recognized that, especially if you take the continental slope into account, the continents fit together incredibly well. Just look at South A ...
Slide 1
... inner core is a solid section of the Earth and is unattached to the mantle, being suspended by the molten outer core. The inner core is predominantly iron metal with significant amounts of the element nickel. This inner layer in mutual combination with the rotational motion of the Earth creates a dy ...
... inner core is a solid section of the Earth and is unattached to the mantle, being suspended by the molten outer core. The inner core is predominantly iron metal with significant amounts of the element nickel. This inner layer in mutual combination with the rotational motion of the Earth creates a dy ...
Unit 4 Chapter
... Subsidence- It is the apparent sinking of the ocean floor due to the deposition of mud, sand and gravel flowing from rivers. This deposition is occurring in the Gulf of Mexico at the mouth of the Mississippi River. Glaciers and Isostasy The weight of the ice makes the land sink the ocean floor rises ...
... Subsidence- It is the apparent sinking of the ocean floor due to the deposition of mud, sand and gravel flowing from rivers. This deposition is occurring in the Gulf of Mexico at the mouth of the Mississippi River. Glaciers and Isostasy The weight of the ice makes the land sink the ocean floor rises ...
convection
... Convection is the heat transfer by the movement of a heated ___________________. During _________________, heated particles of _________________ within the earth’s mantle begin to flow, transferring heat energy from one part of the mantle to another. Heat from Earth’s _________________ is the source ...
... Convection is the heat transfer by the movement of a heated ___________________. During _________________, heated particles of _________________ within the earth’s mantle begin to flow, transferring heat energy from one part of the mantle to another. Heat from Earth’s _________________ is the source ...
ScherstenNERCArticle..
... The central iron core of our planet has a solid inner and a liquid outer layer. A silicate mantle surrounds the core, and on top of that is the Earth’s solid crust. The mantle gets heat both from the core, and by the decay of radioactive isotopes. Hot material is buoyant, and this sets up a slow con ...
... The central iron core of our planet has a solid inner and a liquid outer layer. A silicate mantle surrounds the core, and on top of that is the Earth’s solid crust. The mantle gets heat both from the core, and by the decay of radioactive isotopes. Hot material is buoyant, and this sets up a slow con ...
blue (Page 1)
... joined, some while they were joined, others during the splitting of the continents, and still others after they became separated. How can we tell which rock formations and geologic features are significant in trying to find a match between the continents? A logical starting point is to see if the ag ...
... joined, some while they were joined, others during the splitting of the continents, and still others after they became separated. How can we tell which rock formations and geologic features are significant in trying to find a match between the continents? A logical starting point is to see if the ag ...
David Foster - University of Florida Paul Mueller
... • How are cratons stabilized and once “cratonized” how are they reactivated? • Is there a typical crustal/lithospheric structure associated with major mineralization? • How strong is crust in orogenic zones and why does it extend? • The nature of magmatic underplating and repeated mafic magma intrus ...
... • How are cratons stabilized and once “cratonized” how are they reactivated? • Is there a typical crustal/lithospheric structure associated with major mineralization? • How strong is crust in orogenic zones and why does it extend? • The nature of magmatic underplating and repeated mafic magma intrus ...
Earth Systems
... The mantle is the layer of the earth between the crust and the outer core. It has an average thickness of 1,793 miles. The mantle makes up about 84% of the earth’s volume. The mantle is more dense than the crust. ...
... The mantle is the layer of the earth between the crust and the outer core. It has an average thickness of 1,793 miles. The mantle makes up about 84% of the earth’s volume. The mantle is more dense than the crust. ...
GEOG - Unit 1
... • Relief—difference in landform elevation from lowest to highest point • Four categories of relief—mountains, hills, plains, plateaus • Topography—the configurations and distribution of landforms • Topographic map shows vertical dimensions, relationship of landforms ...
... • Relief—difference in landform elevation from lowest to highest point • Four categories of relief—mountains, hills, plains, plateaus • Topography—the configurations and distribution of landforms • Topographic map shows vertical dimensions, relationship of landforms ...
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.