Theory of Plate Tectonics and Convection Currents
... is heated and rises again. If this sinking and rising motion continues, it is called a convection current a motion that transfers heat in a material. Convection currents in the mantle are much slower than those in boiling water. The rock creeps only a few centimeters a year. The diagram below shows ...
... is heated and rises again. If this sinking and rising motion continues, it is called a convection current a motion that transfers heat in a material. Convection currents in the mantle are much slower than those in boiling water. The rock creeps only a few centimeters a year. The diagram below shows ...
Continental Drift
... – Earth has a magnetic field, and new rocks align themselves to this field as they cool and crystallize, serving as a “compass needle” record of the magnetic field at that time – Every few million years or so, a magnetic reversal occurs, where Earth’s magnetic field “flip-flops” (so that our compass ...
... – Earth has a magnetic field, and new rocks align themselves to this field as they cool and crystallize, serving as a “compass needle” record of the magnetic field at that time – Every few million years or so, a magnetic reversal occurs, where Earth’s magnetic field “flip-flops” (so that our compass ...
Unit 9 ~ Learning Guide Name
... the magma moves to the surface where the plates are moving apart ocean floor and the cooling magma forms a ridge some ridges are high enough that eventually an island could be visible magma is moving slowly no steam or gases can escape so great pressure builds up Pressure is released in a great expl ...
... the magma moves to the surface where the plates are moving apart ocean floor and the cooling magma forms a ridge some ridges are high enough that eventually an island could be visible magma is moving slowly no steam or gases can escape so great pressure builds up Pressure is released in a great expl ...
Instructions: Moving Plates Questions
... the magma moves to the surface where the plates are moving apart ocean floor and the cooling magma forms a ridge some ridges are high enough that eventually an island could be visible magma is moving slowly no steam or gases can escape so great pressure builds up Pressure is released in a great expl ...
... the magma moves to the surface where the plates are moving apart ocean floor and the cooling magma forms a ridge some ridges are high enough that eventually an island could be visible magma is moving slowly no steam or gases can escape so great pressure builds up Pressure is released in a great expl ...
Sedimentary Rocks
... Magma is a hot liquid made of melted minerals. When magma pours onto the earth’s surface it is called lava. Igneous rock can form underground, where the magma cools slowly. Or, igneous rock can form above ground, where the magma cools quickly. The crystals grow together and form one igneous rock. ...
... Magma is a hot liquid made of melted minerals. When magma pours onto the earth’s surface it is called lava. Igneous rock can form underground, where the magma cools slowly. Or, igneous rock can form above ground, where the magma cools quickly. The crystals grow together and form one igneous rock. ...
Earth Science Bulls Eye We are all surrounded by air. We are all
... calderas, and magma are terms associated with volcanic eruptions. The Earth’s dense core is made of iron and nickel. Winds cause waves on the surface of oceans and lakes. ...
... calderas, and magma are terms associated with volcanic eruptions. The Earth’s dense core is made of iron and nickel. Winds cause waves on the surface of oceans and lakes. ...
EmilyB
... Most earthquakes have been occurring around mainly Japan, China, Indonesia, Malaysia, and much around eastern Asia. Also many have occurred around the Ring of Fire. Most earthquakes are more likely to occur at plate boundaries. The plates smash and grind against each other sometimes causing earthqua ...
... Most earthquakes have been occurring around mainly Japan, China, Indonesia, Malaysia, and much around eastern Asia. Also many have occurred around the Ring of Fire. Most earthquakes are more likely to occur at plate boundaries. The plates smash and grind against each other sometimes causing earthqua ...
Second Circular and Call for Abstracts AGS Colloquium Delta
... recognition that the tectonic evolution of the Appalachians was far more complex than previously envisioned. The Gander and Avalon zones came to be viewed as separate ribbon microcontinents that were rifted at different times from different parts of the Gondwanan margin - Ganderia from the Amazonian ...
... recognition that the tectonic evolution of the Appalachians was far more complex than previously envisioned. The Gander and Avalon zones came to be viewed as separate ribbon microcontinents that were rifted at different times from different parts of the Gondwanan margin - Ganderia from the Amazonian ...
Archean sedimentary rocks
... Origin of Plate Tectonics • By about 4 b.y. ago, the Earth had probably cooled sufficiently for plate formation. • Once plate tectonics was in progress, it generated crustal rock that could be partially melted in subduction zones and added to the continental crust. • Continents also increased in si ...
... Origin of Plate Tectonics • By about 4 b.y. ago, the Earth had probably cooled sufficiently for plate formation. • Once plate tectonics was in progress, it generated crustal rock that could be partially melted in subduction zones and added to the continental crust. • Continents also increased in si ...
Inner Structure of the Earth - Relevance to Earthquakes
... (felsic) sodium potassium aluminium silicate rocks, like granite. The rocks of the crust fall into two major categories – sial and sima (Suess,1831–1914). It is estimated that sima starts about 11 km below the Conrad discontinuity (a second order discontinuity). The uppermost mantle together with th ...
... (felsic) sodium potassium aluminium silicate rocks, like granite. The rocks of the crust fall into two major categories – sial and sima (Suess,1831–1914). It is estimated that sima starts about 11 km below the Conrad discontinuity (a second order discontinuity). The uppermost mantle together with th ...
Reforming the Earth Jeopardy (Ch 10-13)
... This forms in the ocean where one plate is subducted ...
... This forms in the ocean where one plate is subducted ...
AN HYPOTHESIS ON THE ORIGIN OF ATKALINE ROCKS
... melting. The processis self-stabilizing and tends to lead to extended periods o[ alkaline igneous activity. Within the mantle it leads to conversion of basaltic magmas into olivine nephelinites, the parent magma of mafic alkaline rod
... melting. The processis self-stabilizing and tends to lead to extended periods o[ alkaline igneous activity. Within the mantle it leads to conversion of basaltic magmas into olivine nephelinites, the parent magma of mafic alkaline rod
Earth Science 2: Earthquakes
... http://volcanoes.usgs.gov/about/edu/dynamicplanet/ballglobe/ — Tennis ball tectonic globes http://gearthhacks.com/dlfile20572/Tectonic-Plates.htm — Plate boundaries for Google Earth, preview in G. Maps http://earthquake.usgs.gov/learn/kml.php — Additional Google Earth (KML) files; to view with Googl ...
... http://volcanoes.usgs.gov/about/edu/dynamicplanet/ballglobe/ — Tennis ball tectonic globes http://gearthhacks.com/dlfile20572/Tectonic-Plates.htm — Plate boundaries for Google Earth, preview in G. Maps http://earthquake.usgs.gov/learn/kml.php — Additional Google Earth (KML) files; to view with Googl ...
2PlateTectonicsPowerPoint4
... – Molten rock rises through these cracks. – Molten material cools and forms new crust. – Old ocean floor crust is pulled away-to make room for newly formed floor. – Sea floor slowly spreads apart. ...
... – Molten rock rises through these cracks. – Molten material cools and forms new crust. – Old ocean floor crust is pulled away-to make room for newly formed floor. – Sea floor slowly spreads apart. ...
Sample 5.3.B.2 Complete
... years if it moved at the rate of 3 cm per year. Ask students to consult reference sources to find out the width of the Atlantic Ocean. Then have them discuss how their calculations and findings relate to the theory of plate tectonics. (5.4.6.D.1) ...
... years if it moved at the rate of 3 cm per year. Ask students to consult reference sources to find out the width of the Atlantic Ocean. Then have them discuss how their calculations and findings relate to the theory of plate tectonics. (5.4.6.D.1) ...
presentation source
... The crust, and particularly the upper crust, is assumed to act in a brittle fashion. Progressive formation of a rift valley through extension of the lithosphere and continental crust (by about 50 km). Note that uprise and decompression of the underlying asthenosphere results in magma formation. The ...
... The crust, and particularly the upper crust, is assumed to act in a brittle fashion. Progressive formation of a rift valley through extension of the lithosphere and continental crust (by about 50 km). Note that uprise and decompression of the underlying asthenosphere results in magma formation. The ...
Folding and Faulting Powerpoint
... enormous like the newly formed Rocky Mountains in Western Canada and the United States To the top right is a picture of an anticline. Beneath is a picture of the Rocky Mountains. ...
... enormous like the newly formed Rocky Mountains in Western Canada and the United States To the top right is a picture of an anticline. Beneath is a picture of the Rocky Mountains. ...
Scaling models into their natural prototypes ensures
... Scaling models into their natural prototypes ensures fulfillment of similarity in geometry, ...
... Scaling models into their natural prototypes ensures fulfillment of similarity in geometry, ...
Earth Science Chapter 18: Volcanic Activity Chapter Overview
... • Divergent volcanism – at divergent boundaries tectonic plates move apart and new ocean floor is produced as magma rises to fill the gap. At these ridges, the lava takes the form of giant pillows. Volcanism at divergent boundaries tends to be non-explosive. • Hot spots – some volcanoes form far fro ...
... • Divergent volcanism – at divergent boundaries tectonic plates move apart and new ocean floor is produced as magma rises to fill the gap. At these ridges, the lava takes the form of giant pillows. Volcanism at divergent boundaries tends to be non-explosive. • Hot spots – some volcanoes form far fro ...
Folding and Faulting
... enormous like the newly formed Rocky Mountains in Western Canada and the United States To the top right is a picture of an anticline. Beneath is a picture of the Rocky Mountains. ...
... enormous like the newly formed Rocky Mountains in Western Canada and the United States To the top right is a picture of an anticline. Beneath is a picture of the Rocky Mountains. ...
Magma Emplacement Room Problem How to Accommodate Plutons
... • Pluton contact is subparallel and concordant with foliation in the country rock. • Magmatic minerals have the same isotopic age as minerals that define the age of foliation in the country rock ...
... • Pluton contact is subparallel and concordant with foliation in the country rock. • Magmatic minerals have the same isotopic age as minerals that define the age of foliation in the country rock ...
The Science Behind Volcanoes
... for example the Mid-Atlantic Ridge, has examples of volcanoes caused by divergent tectonic plates pulling apart; the Pacific Ring of Fire has examples of volcanoes caused by convergent tectonic plates coming together. By contrast, volcanoes are usually not created where two tectonic plates slide pas ...
... for example the Mid-Atlantic Ridge, has examples of volcanoes caused by divergent tectonic plates pulling apart; the Pacific Ring of Fire has examples of volcanoes caused by convergent tectonic plates coming together. By contrast, volcanoes are usually not created where two tectonic plates slide pas ...
Large igneous province
A large igneous province (LIP) is an extremely large accumulation of igneous rocks, including liquid rock (intrusive) or volcanic rock formations (extrusive), when hot magma extrudes from inside the Earth and flows out. The source of many or all LIPs is variously attributed to mantle plumes or to processes associated with plate tectonics. Types of LIPs can include large volcanic provinces (LVP), created through flood basalt and large plutonic provinces (LPP). Eleven distinct flood basalt episodes occurred in the past 250 million years, creating volcanic provinces, which coincided with mass extinctions in prehistoric times. Formation depends on a range of factors, such as continental configuration, latitude, volume, rate, duration of eruption, style and setting (continental vs. oceanic), the preexisting climate state, and the biota resilience to change.